Voltage adjustment circuit and memory therefor

Abstract

The embodiment of the present disclosure relates to the technical field of semiconductor, and provides a voltage adjustment circuit and a memory thereof, the voltage adjustment circuit comprising: a reference voltage generation module configured to output a first reference voltage varying with ambient temperature based on an ambient temperature where the reference voltage generation module is located; a comparison module configured to receive the first reference voltage, a second reference voltage and a third reference voltage, and compare the size of the first reference voltage and the second reference voltage or the size of the first reference voltage and the third reference voltage to output a control signal; and a voltage output module receiving the first reference voltage, the second reference voltage and the third reference voltage, and outputting an output voltage based on the first reference voltage, the second reference voltage and the third reference voltage as a first input voltage of the voltage output module based on the control signal. The embodiment of the present disclosure is at least beneficial to adjusting the output voltage based on the ambient temperature.

Description

Technical Field

[0001] This disclosure relates to the field of semiconductor technology, and in particular to a voltage regulation circuit and its memory. Background Technology

[0002] Current memory systems have multiple power states to reduce power consumption when idle or stagnant (e.g., low power state). In memory power supply systems, various different supply voltages are required. For example, some supply voltages need to vary with temperature to improve memory performance or extend memory lifespan, while certain supply voltages need a temperature coefficient within a specific temperature range, meaning the supply voltage needs to change with temperature within that range.

[0003] However, for existing power supply systems, ensuring a stable output voltage while enabling temperature-based voltage regulation to improve the diversity of output voltages is a challenge. Summary of the Invention

[0004] This disclosure provides a voltage regulation circuit and its memory, which at least facilitates the regulation of the output voltage based on ambient temperature.

[0005] According to some embodiments of this disclosure, one aspect of this disclosure provides a voltage adjustment circuit, including: a reference voltage generation module configured to output a first reference voltage based on the ambient temperature at which the reference voltage generation module is located, wherein the first reference voltage varies with changes in the ambient temperature; a comparison module configured to receive the first reference voltage, a second reference voltage, and a third reference voltage, and compare the magnitudes of the first reference voltage and the second reference voltage, or compare the magnitudes of the first reference voltage and the third reference voltage, to output a control signal characterizing the comparison result, wherein the second reference voltage and the third reference voltage are different fixed values; and a voltage output module receiving the first reference voltage, the second reference voltage, and the third reference voltage, and using one of the first reference voltage, the second reference voltage, and the third reference voltage as a first input voltage of the voltage output module based on the control signal, and outputting an output voltage based on the first input voltage.

[0006] In some embodiments, the reference voltage generation module is configured to increase the first reference voltage as the ambient temperature decreases.

[0007] In some embodiments, the voltage output module is configured to: if the ambient temperature is greater than a first temperature, use the received second reference voltage as the first input voltage based on the control signal; if the ambient temperature is less than the first temperature but greater than a second temperature, use the received first reference voltage as the first input voltage based on the control signal; and if the ambient temperature is less than the second temperature, use the received third reference voltage as the first input voltage based on the control signal.

[0008] In some embodiments, if the ambient temperature is equal to the first temperature, the first reference voltage is equal to the second reference voltage; if the ambient temperature is equal to the second temperature, the first reference voltage is equal to the third reference voltage.

[0009] In some embodiments, the control signal includes a first control signal and a second control signal, and the comparison module includes: a first comparison unit configured to receive the first reference voltage and the second reference voltage, and compare the magnitudes of the first reference voltage and the second reference voltage to output the first control signal characterizing a first comparison result; and a second comparison unit configured to receive the first reference voltage and the third reference voltage, and compare the magnitudes of the first reference voltage and the third reference voltage to output the second control signal characterizing a second comparison result.

[0010] In some embodiments, the voltage output module includes: a switching unit configured to receive a first reference voltage, a second reference voltage, and a third reference voltage, and output one of the first reference voltage, the second reference voltage, and the third reference voltage as the first input voltage based on the first control signal and the second control signal; and a voltage output unit configured to receive the first input voltage and a second input voltage and output the output voltage, wherein the second input voltage is a feedback voltage provided based on the output voltage.

[0011] In some embodiments, the voltage output unit includes a first input terminal and a second input terminal, the first input terminal receiving the first input voltage and the second input terminal receiving the second input voltage; the switching unit includes: a first switching unit configured to turn on or off the transmission path between the first input terminal and the first reference voltage based on the first control signal and the second control signal; a second switching unit configured to turn on or off the transmission path between the first input terminal and the second reference voltage based on the first control signal; and a third switching unit configured to turn on or off the transmission path between the first input terminal and the third reference voltage based on the second control signal.

[0012] In some embodiments, the first control signal and the second control signal change based on the change in ambient temperature. The first switching unit includes a logic judgment circuit, which is configured to output a third control signal based on the first control signal and the second control signal. If the ambient temperature is less than the first temperature and greater than the second temperature, the output third control signal is high; if the ambient temperature is greater than the first temperature or less than the second temperature, the output third control signal is low.

[0013] In some embodiments, the first switching unit is configured to: if the third control signal is high, conduct the transmission path between the first input terminal and the first reference voltage; if the third control signal is low, turn off the transmission path between the first input terminal and the first reference voltage.

[0014] In some embodiments, the first comparison unit includes a first positive input terminal and a first negative input terminal, the first positive input terminal receiving the second reference voltage, and the first negative input terminal receiving the first reference voltage; the first comparison unit is configured to: if the ambient temperature is greater than the first temperature, the second reference voltage is greater than the first reference voltage, and the first control signal is high; if the ambient temperature is less than the first temperature, the second reference voltage is less than the first reference voltage, and the first control signal is low.

[0015] In some embodiments, the second switching unit is configured to: if the first control signal is high, conduct the transmission path between the first input terminal and the second reference voltage; if the first control signal is low, turn off the transmission path between the first input terminal and the second reference voltage.

[0016] In some embodiments, the second comparison unit includes a second positive input terminal and a second negative input terminal, the second positive input terminal receiving the third reference voltage and the second negative input terminal receiving the first reference voltage; the second comparison unit is configured to: if the ambient temperature is greater than the second temperature, the third reference voltage is greater than the first reference voltage, and the second control signal is high; if the ambient temperature is less than the second temperature, the third reference voltage is less than the first reference voltage, and the second control signal is low.

[0017] In some embodiments, the third switching unit is further configured to: if the second control signal is high, shut off the transmission path between the first input terminal and the third reference voltage; if the second control signal is low, turn on the transmission path between the first input terminal and the third reference voltage.

[0018] In some embodiments, the logic judgment circuit includes an XOR gate circuit. If both the first control signal and the second control signal are high, the third control signal output by the XOR gate circuit is low; if the first control signal is low and the second control signal is high, the third control signal output by the XOR gate circuit is high; if both the first control signal and the second control signal are low, the third control signal output by the XOR gate circuit is low.

[0019] In some embodiments, the second comparison unit includes a second positive input terminal and a second negative input terminal, the second positive input terminal receiving the first reference voltage and the second negative input terminal receiving the third reference voltage; the second comparison unit is configured to: if the ambient temperature is greater than the second temperature, the first reference voltage is less than the third reference voltage, and the second control signal is low; if the ambient temperature is less than the second temperature, the first reference voltage is greater than the third reference voltage, and the second control signal is high.

[0020] In some embodiments, the third switching unit is further configured to: if the second control signal is high, conduct the transmission path between the first input terminal and the third reference voltage; if the second control signal is low, turn off the transmission path between the first input terminal and the third reference voltage.

[0021] In some embodiments, the logic judgment circuit includes a NOR gate circuit. If the first control signal is high and the second control signal is low, the third control signal output by the NOR gate circuit is low; if both the first control signal and the second control signal are low, the third control signal output by the NOR gate circuit is high; if the first control signal is low and the second control signal is high, the third control signal output by the NOR gate circuit is low.

[0022] In some embodiments, the first comparison unit includes a first positive input terminal and a first negative input terminal, the first positive input terminal receiving the first reference voltage, and the first negative input terminal receiving the second reference voltage; the first comparison unit is configured to: if the ambient temperature is greater than the first temperature and the first reference voltage is less than the second reference voltage, the first control signal is at a low level; if the ambient temperature is less than the first temperature and the first reference voltage is greater than the second reference voltage, the first control signal is at a high level; the second switching unit is configured to: if the ambient temperature is greater than the first temperature, conduct the transmission path between the first input terminal and the second reference voltage based on the first control signal; if the ambient temperature is less than the first temperature, deactivate the transmission path between the first input terminal and the second reference voltage based on the first control signal.

[0023] In some embodiments, the voltage adjustment circuit further includes: a second reference voltage supply module, the second reference voltage supply module including at least two second gear switches, one of the second gear switches corresponding to a first preset voltage; the second reference voltage supply module is configured to selectively turn on one of the second gear switches and output the first preset voltage as the second reference voltage.

[0024] In some embodiments, the voltage adjustment circuit further includes: a third reference voltage supply module, the third reference voltage supply module including at least two third gear switches, one of the third gear switches corresponding to a second preset voltage; the third reference voltage supply module is configured to selectively turn on one of the third gear switches and output a second preset voltage as the third reference voltage.

[0025] According to some embodiments of this disclosure, another aspect of this disclosure also provides a memory including the voltage regulation circuit described in any of the above claims.

[0026] The technical solution provided in this disclosure has at least the following advantages:

[0027] A reference voltage generation module generates a first reference voltage that varies with ambient temperature. Additionally, a second and third reference voltage, each with a different fixed value, are provided. A comparison module compares the magnitudes of the first and second reference voltages, or compares the magnitudes of the first and third reference voltages, and outputs a control signal. This causes the voltage output module to use one of the first, second, or third reference voltages as its first input voltage. Thus, within a certain range of ambient temperature, the voltage output module uses the first reference voltage as its first input voltage and can output a voltage that varies with ambient temperature based on the temperature-varying first reference voltage. Furthermore, within other ambient temperature ranges, the voltage output module uses either the second or third reference voltage as its first input voltage and can output a fixed output voltage based on either the fixed second or third reference voltage. This allows for temperature-based adjustment of the output voltage, improving the versatility of output voltage variations. Attached Figure Description

[0028] One or more embodiments are illustrated by way of example with corresponding pictures in the accompanying drawings. These illustrations do not constitute a limitation on the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the figures in the drawings do not constitute a limitation on scale. In order to more clearly illustrate the technical solutions in the embodiments of this disclosure or the conventional technology, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of a functional module of a voltage adjustment circuit provided in an embodiment of the present disclosure;

[0030] Figure 2 A line graph showing the change of output voltage with ambient temperature in a voltage regulation circuit provided in one embodiment of this disclosure;

[0031] Figure 3 Another line graph showing how the output voltage of a voltage regulation circuit provided in an embodiment of this disclosure changes with ambient temperature;

[0032] Figure 4 A circuit diagram of a reference voltage generation module in a voltage adjustment circuit provided in an embodiment of this disclosure;

[0033] Figure 5 This is a schematic diagram of another functional module of a voltage regulation circuit provided in one embodiment of the present disclosure;

[0034] Figure 6 This is yet another line graph showing how the output voltage of a voltage regulation circuit provided in an embodiment of the present disclosure changes with ambient temperature.

[0035] Figure 7 A circuit diagram of a comparison module in a voltage adjustment circuit provided in an embodiment of this disclosure;

[0036] Figure 8 This is a schematic diagram of a functional module of a voltage output module in a voltage regulation circuit provided in an embodiment of the present disclosure;

[0037] Figure 9 , Figure 10 and Figure 13 Three circuit diagrams of the voltage output module in a voltage regulation circuit provided in one embodiment of this disclosure;

[0038] Figure 11 and Figure 12 Two other circuit diagrams for the comparison module in a voltage regulation circuit provided in one embodiment of this disclosure. Detailed Implementation

[0039] As can be seen from the background technology, memory needs to provide a power supply voltage that can be adjusted based on temperature, and the diversity of power supply voltages needs to be improved.

[0040] This disclosure provides a voltage adjustment circuit and its memory. In the voltage adjustment circuit, a reference voltage generation module generates a first reference voltage that varies with the ambient temperature. A control signal generated by a comparison module causes the voltage output module to use one of the first, second, and third reference voltages as its first input voltage. Thus, within a certain range of ambient temperature, the voltage output module uses the first reference voltage as its first input voltage and can output an output voltage that varies with the ambient temperature based on the first reference voltage. Furthermore, within other ambient temperature ranges, the voltage output module uses either the second or third reference voltage as its first input voltage and can output a fixed output voltage based on the fixed value of the second or third reference voltage. This achieves output voltage adjustment based on ambient temperature, thereby increasing the diversity of output voltage variations.

[0041] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings. However, those skilled in the art will understand that many technical details have been provided in the embodiments of this disclosure to facilitate a better understanding of the embodiments. However, the technical solutions claimed in the embodiments of this disclosure can be implemented even without these technical details and various variations and modifications based on the following embodiments.

[0042] This disclosure provides a voltage adjustment circuit according to one embodiment. The voltage adjustment circuit provided by this disclosure will be described in detail below with reference to the accompanying drawings.

[0043] Figure 1 This is a schematic diagram of a functional module of a voltage adjustment circuit provided in an embodiment of the present disclosure; Figure 2 A line graph showing the change of output voltage with ambient temperature in a voltage regulation circuit provided in one embodiment of this disclosure; Figure 3 Another line graph showing how the output voltage of a voltage regulation circuit provided in an embodiment of this disclosure changes with ambient temperature; Figure 4 A circuit diagram of a reference voltage generation module in a voltage adjustment circuit provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of another functional module of a voltage regulation circuit provided in one embodiment of the present disclosure; Figure 6 This is yet another line graph showing how the output voltage of a voltage regulation circuit provided in an embodiment of the present disclosure changes with ambient temperature. Figure 7 A circuit diagram of a comparison module in a voltage adjustment circuit provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of a functional module of a voltage output module in a voltage regulation circuit provided in an embodiment of the present disclosure; Figure 9 , Figure 10 and Figure 13 Three circuit diagrams of the voltage output module in a voltage regulation circuit provided in one embodiment of this disclosure; Figure 11 and Figure 12 Two other circuit diagrams for the comparison module in a voltage regulation circuit provided in one embodiment of this disclosure.

[0044] refer to Figure 1The voltage adjustment circuit includes: a reference voltage generation module 100, configured to output a first reference voltage Vref1 based on the ambient temperature Temp at which the reference voltage generation module 100 is located, the first reference voltage Vref1 changing with the ambient temperature Temp; a comparison module 101, configured to receive the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3, and compare the magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2, or compare the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3, to output a control signal op characterizing the comparison result, the second reference voltage Vref2 and the third reference voltage Vref3 being different fixed values; and a voltage output module 102, receiving the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3, and based on the control signal op, using one of the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3 as the first input voltage Vin1 of the voltage output module 102, and outputting an output voltage Vout based on the first input voltage Vin1.

[0045] The reference voltage generation module 100 generates a first reference voltage Vref1 that changes with ambient temperature. It also provides second and third reference voltages Vref2 and Vref3, which are fixed values ​​and do not change with ambient temperature (Temp).

[0046] Then, the comparison module 101 compares the magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2. Since the first reference voltage Vref1 changes with the ambient temperature Temp, there are cases where the magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2 are equal when the ambient temperature Temp is the first temperature, and unequal when the ambient temperature Temp is not the first temperature. Thus, the comparison module 101 can generate different control signals op based on the difference in magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2, so that the voltage output module 102 uses the first reference voltage Vref1 or the second reference voltage Vref2 as the first input voltage Vin1 based on the different control signals op.

[0047] Alternatively, the comparison module 101 can be used to compare the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3. Since the first reference voltage Vref1 changes with the ambient temperature Temp, there are cases where the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3 are equal when the ambient temperature Temp is the second temperature, and unequal when the ambient temperature Temp is not the second temperature. Thus, the comparison module 101 can generate different control signals op based on the difference in the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3, so that the voltage output module 102 uses either the first reference voltage Vref1 or the third reference voltage Vref3 as the first input voltage Vin1 based on the different control signals op.

[0048] Thus, in one example, within a certain range of ambient temperature, for example, when the ambient temperature Temp is greater than the second temperature and less than the first temperature, the change in the first reference voltage Vref1 causes the control signal op output by the comparison module 101 to enable the voltage output module 102 to use the first reference voltage Vref1 as the first input voltage Vin1, and to output an output voltage Vout that varies with the ambient temperature Temp based on the first reference voltage Vref1 that varies with the ambient temperature Temp. Moreover, in other ambient temperature ranges, for example, when the ambient temperature Temp is less than or equal to the second temperature or greater than or equal to the first temperature, the change in the first reference voltage Vref1 causes the control signal op output by the comparison module 101 to enable the voltage output module 102 to use the second reference voltage Vref2 or the third reference voltage Vref3 as the first input voltage Vin1, and to output a fixed output voltage Vout based on the second reference voltage Vref2 or the third reference voltage Vref3 that is a fixed value, thereby realizing the adjustment of the output voltage Vout based on the ambient temperature Temp to improve the diversity of the output voltage Vout variation.

[0049] It should be noted that the above example uses the condition that the first temperature is greater than the second temperature. In practical applications, the second temperature can also be greater than the first temperature. Furthermore, when the ambient temperature Temp equals the first temperature, the first reference voltage Vref1 is equal to one of the second reference voltage Vref2 and the third reference voltage Vref3. When the ambient temperature Temp equals the second temperature, the first reference voltage Vref1 is equal to the other of the second reference voltage Vref2 and the third reference voltage Vref3.

[0050] The embodiments of this disclosure will now be described in more detail with reference to the accompanying drawings.

[0051] In some embodiments, reference Figure 2 The reference voltage generation module 100 can be configured to increase the first reference voltage Vref1 as the ambient temperature Temp decreases. It should be noted that in practical applications, the reference... Figure 3 The reference voltage generation module 100 can also be configured to increase the first reference voltage Vref1 as the ambient temperature Temp increases. This embodiment of the present disclosure does not limit the trend of the first reference voltage Vref1 changing with the ambient temperature Temp; it can be set according to actual needs. For the sake of subsequent detailed description of the voltage adjustment circuit, an example is given where the reference voltage generation module 100 increases the first reference voltage Vref1 as the ambient temperature Temp decreases.

[0052] In some embodiments, reference Figure 4 The reference voltage generation module 100 may include: a first node net1, a first resistor R1, and a second resistor R2, wherein the voltage at one end of the first resistor R1 is a first voltage Vbg, and the other end of the first resistor R1 and one end of the second resistor R2 are both electrically connected to the first node net1, and the voltage at the first node net1 is a first reference voltage Vref1; a transistor Triode, the base and collector of the transistor Triode are both electrically connected to the other end of the second resistor R2, the emitter of the transistor Triode is grounded, and the voltage between the base and collector of the transistor Triode is a second voltage Vbe. Understandably, with this connection method, the voltage difference Vbe between the base and emitter of the transistor can have a negative temperature coefficient, meaning that the voltage difference Vbe between the base and emitter increases as the ambient temperature Temp decreases. This causes the current flowing through the transistor, the first resistor R1, and the second resistor R2 to decrease as the ambient temperature Temp decreases, thereby causing the voltage at the first node net1 to increase as the ambient temperature Temp decreases, i.e., the first reference voltage Vref1 increases as the ambient temperature Temp decreases.

[0053] It should be noted that the base and emitter / collector of the triode are both electrically connected to the other end of the second resistor R2, and the collector and emitter of the triode are grounded. With this connection, the triode is equivalent to a diode. Figure 4 The triode is drawn as a diode.

[0054] In one example, the first voltage Vbg can be the bandgap reference voltage, which does not change with the ambient temperature Temp.

[0055] In some embodiments, the reference voltage generation module 100 may further include a third resistor R3, one end of which is electrically connected to the first node net1, and the other end is grounded.

[0056] The following describes in detail the voltage output module 102 receiving the first input voltage Vin1 based on the control signal op through four embodiments.

[0057] In some embodiments, reference Figure 1 and Figure 2 The voltage output module 102 can be configured to: if the ambient temperature Temp is greater than the first temperature Temp1, use the received second reference voltage Vref2 as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the first temperature Temp1 but greater than the second temperature Temp2, use the received first reference voltage Vref1 as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the second temperature Temp2, use the received third reference voltage Vref3 as the first input voltage Vin1 based on the control signal op.

[0058] In other embodiments, the first reference voltage Vref1 may increase with the increase of the ambient temperature Temp, and the second reference voltage Vref2 may be greater than the third reference voltage Vref3. The voltage output module 102 may be configured to: if the ambient temperature Temp is greater than the first temperature Temp1, use the received second reference voltage Vref2 as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the second temperature Temp2, use the received third reference voltage Vref3 as the first input voltage Vin1 based on the control signal op.

[0059] In the two embodiments described above, if the ambient temperature Temp equals the first temperature Temp1, the first reference voltage Vref1 equals the second reference voltage Vref2; if the ambient temperature Temp equals the second temperature Temp2, the first reference voltage Vref1 equals the third reference voltage Vref3.

[0060] In some other embodiments, reference is made to Figure 1 and Figure 3The voltage output module 102 can be configured as follows: if the ambient temperature Temp is greater than the first temperature Temp1, the received third reference voltage Vref3 is used as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the first temperature Temp1 but greater than the second temperature Temp2, the received first reference voltage Vref1 is used as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the second temperature Temp2, the received second reference voltage Vref2 is used as the first input voltage Vin1 based on the control signal op. The first reference voltage Vref1 increases with the increase of the ambient temperature Temp, and the second reference voltage Vref2 is less than the third reference voltage Vref3.

[0061] In some embodiments, the first reference voltage Vref1 increases as the ambient temperature Temp decreases, and the second reference voltage Vref2 can be greater than the third reference voltage Vref3. The voltage output module 102 can be configured to: if the ambient temperature Temp is greater than the first temperature Temp1, use the received third reference voltage Vref3 as the first input voltage Vin1 based on the control signal op; if the ambient temperature Temp is less than the second temperature Temp2, use the received second reference voltage Vref2 as the first input voltage Vin1 based on the control signal op.

[0062] In the two embodiments described above, if the ambient temperature Temp equals the first temperature Temp1, the first reference voltage Vref1 equals the third reference voltage Vref3; if the ambient temperature Temp equals the second temperature Temp2, the first reference voltage Vref1 equals the second reference voltage Vref2.

[0063] In the four embodiments described above, the first temperature Temp1 is greater than the second temperature Temp2. ​​In one example, the first temperature can be 20°C and the second temperature can be -10°C.

[0064] In some embodiments, reference Figure 5 The voltage adjustment circuit may further include: a second reference voltage supply module 103, which includes at least two second-position switches 113, each second-position switch 113 corresponding to a first preset voltage; the second reference voltage supply module 103 may be configured to selectively turn on one of the second-position switches 113, outputting the first preset voltage as the second reference voltage Vref2. Furthermore, the reference... Figure 5 The second reference voltage supply module 103 also includes a second reference voltage supply unit 123, which is configured to provide a first preset voltage with a different voltage value.

[0065] Figure 5The second reference voltage supply module 103 includes three second-position switches 113, with first preset voltages Vref21, Vref22, and Vref23 corresponding to the second-position switches 113, respectively. Taking this as an example, the second reference voltage supply module 103 selectively activates one of the second-position switches 113 to output one of Vref21, Vref22, and Vref23 as the second reference voltage Vref2. The voltage values ​​of Vref21, Vref22, and Vref23 are different. In practical applications, the number of second-position switches 113 included in the second reference voltage supply module 103 is not limited, as long as there is a one-to-one correspondence between the second-position switches 113 and the first preset voltage.

[0066] Thus, in conjunction with references Figure 5 and Figure 6 Since the second reference voltage supply unit 123 can provide first preset voltages with different voltage values, such as Vref21, Vref22, and Vref23, and then turns on one of the three second level switches 113, one of the three first preset voltages is output as the second reference voltage Vref2. This makes the voltage value of the second reference voltage Vref2 adjustable, so that the second reference voltage Vref2 has different levels. That is, different sizes of second reference voltage Vref2 can be provided to the comparison module 101. The first temperature Temp1 can also have a level corresponding to the level of the second reference voltage Vref2. That is, one first preset voltage corresponds to one first temperature Temp1, so as to realize the adjustment of the second reference voltage Vref2 and the adjustment of the first temperature Temp1. This is beneficial to adjust the range of the temperature range formed by the first temperature Temp1 and the second temperature Temp2, so as to increase the diversity of the changes of the second reference voltage Vref2 and the first reference voltage Vref1, thereby increasing the diversity of the changes of the output voltage Vout.

[0067] In some embodiments, continue to refer to Figure 5 The voltage adjustment circuit may further include: a third reference voltage supply module 104, which may include at least two third-position switches 114, one of which corresponds to a second preset voltage; the third reference voltage supply module 104 may be configured to selectively turn on one of the third-position switches 114, outputting the second preset voltage as the third reference voltage Vref3. Furthermore, the reference... Figure 5 The third reference voltage supply module 104 also includes a third reference voltage supply unit 124, which is configured to provide a second preset voltage with a different voltage value.

[0068] Figure 5The third reference voltage supply module 104 includes three third-position switches 114, with the second preset voltages corresponding to the third-position switches 114 being Vref31, Vref32, and Vref33, respectively. Taking this as an example, the third reference voltage supply module 104 selectively activates one of the third-position switches 114 to output one of Vref31, Vref32, and Vref33 as the third reference voltage Vref3. The voltage values ​​of Vref31, Vref32, and Vref33 are different. In practical applications, the number of third-position switches 114 included in the third reference voltage supply module 104 is not limited, as long as the third-position switches 114 correspond one-to-one with the second preset voltage.

[0069] Thus, in conjunction with references Figure 5 and Figure 6 Since the third reference voltage supply unit 124 can provide second preset voltages with different voltage values, such as Vref31, Vref32, and Vref33, and then turns on one of the three third level switches 114, one of the three second preset voltages is output as the third reference voltage Vref3. This makes the voltage value of the third reference voltage Vref3 adjustable, so that the third reference voltage Vref has different levels. That is, different sizes of the third reference voltage Vref3 can be provided to the comparison module 101. The second temperature Temp2 can also have a level corresponding to the level of the third reference voltage Vref3. That is, one second preset voltage corresponds to one second temperature Temp2, so as to realize the adjustment of the third reference voltage Vref3 and the adjustment of the second temperature Temp2. ​​This is beneficial to adjust the range of the temperature range formed by the first temperature Temp1 and the second temperature Temp2, so as to increase the diversity of the changes of the third reference voltage Vref3 and the first reference voltage Vref1, thereby increasing the diversity of the changes of the output voltage Vout.

[0070] It should be noted that, Figure 5 Taking the voltage adjustment circuit as an example, which includes both the second reference voltage supply module 103 and the third reference voltage supply module 104, in practical applications, the voltage adjustment circuit may include only one of the second reference voltage supply module 103 and the third reference voltage supply module 104. Figure 6 Taking the example that both the first temperature Temp1 and the second temperature Temp2 include multiple settings, in practical applications, only one of the first temperature Temp1 and the second temperature Temp2 may include multiple settings.

[0071] The comparison module 101 and the voltage output module 102 are described in detail below.

[0072] In some embodiments, reference Figures 7 to 10The control signal op may include a first control signal op1 and a second control signal op2. The comparison module 101 may include: a first comparison unit 111, configured to receive a first reference voltage Vref1 and a second reference voltage Vref2, and compare the magnitudes of the first reference voltage Vref1 and the second reference voltage Vref2 to output a first control signal op1 representing a first comparison result; and a second comparison unit 121, configured to receive a first reference voltage Vref1 and a third reference voltage Vref3, and compare the magnitudes of the first reference voltage Vref1 and the third reference voltage Vref3 to output a second control signal op2 representing a second comparison result.

[0073] In some embodiments, reference Figure 8 The voltage output module 102 may include: a switching unit 112, configured to receive a first reference voltage Vref, a second reference voltage Vref2, and a third reference voltage Vref3, and output one of the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref as a first input voltage Vin1 based on a first control signal op1 and a second control signal op2; and a voltage output unit 122, configured to receive the first input voltage Vin1 and the second input voltage Vin2 and output an output voltage Vout, wherein the second input voltage Vin2 is a feedback voltage provided based on the output voltage Vout.

[0074] In some embodiments, reference Figures 8 to 10 The voltage output unit 122 may include an operational amplifier 132, which includes a first input terminal, a second input terminal, and an output terminal. The first input terminal receives a first input voltage Vin1, the second input terminal receives a second input voltage Vin2, and the output terminal outputs an output voltage Vout.

[0075] In some embodiments, reference Figures 8 to 10 The voltage output unit 122 may further include: a second node net2, a third node net3, a fourth resistor R4, and a fifth resistor R5. The second node net2 is the connection point between the output terminal of the operational amplifier 132 and one end of the fourth resistor R4. The voltage at the second node net2 is the output voltage Vout. The other end of the fourth resistor R4 and one end of the fifth resistor R5 are both electrically connected to the third node net3. The other end of the fifth resistor R5 is grounded. The third node net3 is also electrically connected to the second input terminal of the operational amplifier 132. The voltage at the third node net3 is the second input voltage Vin2.

[0076] In this configuration, the fourth resistor R4 and the fifth resistor R5 act as a voltage divider. When the operational amplifier 132 adjusts the output voltage Vout based on the received first input voltage Vin1 and second input voltage Vin2, if the first input voltage Vin1 is greater than the second input voltage Vin2, the operational amplifier 132 outputs a larger output voltage Vout, resulting in a larger current flowing through the fourth resistor R4 and the fifth resistor R5. This increases the voltage at the third node net3, i.e., the second input voltage Vin2, until the second input voltage Vin2 equals the first input voltage Vin1, resulting in a stable output voltage Vout. Conversely, if the first input voltage Vin1 is less than the second input voltage Vin2, the operational amplifier 132 outputs a smaller output voltage Vout, resulting in a smaller current flowing through the fourth resistor R4 and the fifth resistor R5. This decreases the voltage at the third node net3, i.e., the second input voltage Vin2, until the second input voltage Vin2 equals the first input voltage Vin1, resulting in a stable output voltage Vout.

[0077] In some embodiments, reference Figure 9 and Figure 10 The voltage output unit 122 may include a first input terminal and a second input terminal, the first input terminal receiving a first input voltage Vin1 and the second input terminal receiving a second input voltage Vin2; the switching unit 112 may include: a first switching unit 142, configured to turn on or off the transmission path between the first input terminal and the first reference voltage Vref1 based on a first control signal op1 and a second control signal op2; a second switching unit 152, configured to turn on or off the transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op1; and a third switching unit 162, configured to turn on or off the transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op2.

[0078] It is understandable that when the voltage adjustment circuit is in operation, based on the first control signal op1 and the second control signal op2, only one of the first switching unit 142, the second switching unit 152, and the third switching unit 162 controls a transmission path that is in a conducting state, while the conducting paths of the other two are in a closed state. Furthermore, the first control signal op1 and the second control signal op2 are related to the magnitudes of the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3. Based on the differences in the magnitudes of the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3, it is determined that the ambient temperature Temp of the voltage adjustment circuit is different. Therefore, the first control signal op1 and the second control signal op2 generated by the comparison module 101 are different, causing the operating states of the first switching unit 142, the second switching unit 152, and the third switching unit 162 to be different. This causes the first input voltage Vin1 received by the voltage output module 102 to change with the ambient temperature Temp, so that the output voltage Vout changes with the ambient temperature Temp.

[0079] In some embodiments, continue to refer to Figure 9 and Figure 10 The first control signal op1 and the second control signal op2 change based on the change of ambient temperature Temp. The first switching unit 142 includes a logic judgment circuit 172, which is configured to output a third control signal op3 based on the first control signal op1 and the second control signal op2. If the ambient temperature Temp is less than the first temperature Temp1 and greater than the second temperature Temp2, the output third control signal op3 is high; if the ambient temperature Temp is greater than the first temperature Temp1 or less than the second temperature Temp2, the output third control signal op3 is low.

[0080] In some embodiments, the first switching unit 142 can be configured to: if the third control signal op3 is high, conduct the transmission path between the first input terminal and the first reference voltage Vref1; if the third control signal op3 is low, turn off the transmission path between the first input terminal and the first reference voltage Vref1.

[0081] It should be noted that, in practical applications, the first switching unit 142 can also be configured to: if the third control signal op3 is low, conduct the transmission path between the first input terminal and the first reference voltage Vref1; if the third control signal op3 is high, turn off the transmission path between the first input terminal and the first reference voltage Vref1. Furthermore, Figure 9 and Figure 10The diagram uses a simplified drawing of a switch to illustrate the control of the transmission path between the first input terminal and the first reference voltage Vref1 by the first switch unit 142. In practical applications, there are no restrictions on the device that controls the transmission path between the first input terminal and the first reference voltage Vref1. It is only necessary that the device can turn on and off the transmission path between the first input terminal and the first reference voltage Vref1 based on the high and low levels of the third control signal op3.

[0082] The following provides a detailed description of the cooperation relationship between the first comparison unit 111, the second comparison unit 121, and the switching unit 112.

[0083] In some embodiments, in conjunction with reference Figure 2 and Figure 7 The first comparison unit 111 may include a first positive input terminal and a first negative input terminal. The first positive input terminal receives a second reference voltage Vref2, and the first negative input terminal receives a first reference voltage Vref1. The first comparison unit 111 is configured such that: if the ambient temperature Temp is greater than the first temperature Temp1, the second reference voltage Vref2 is greater than the first reference voltage Vref1, and the first control signal op1 is high; if the ambient temperature Temp is less than the first temperature Temp1, the second reference voltage Vref2 is less than the first reference voltage Vref1, and the first control signal op1 is low.

[0084] Among them, reference Figure 9 and Figure 10 The second switching unit 152 can be configured to: if the first control signal op1 is high, conduct the transmission path between the first input terminal and the second reference voltage Vref2; if the first control signal op1 is low, turn off the transmission path between the first input terminal and the second reference voltage Vref2.

[0085] It should be noted that, in practical applications, the second switching unit 152 can also be configured to: if the first control signal op1 is low, conduct the transmission path between the first input terminal and the second reference voltage Vref2; if the first control signal op1 is high, turn off the transmission path between the first input terminal and the second reference voltage Vref2. Furthermore, Figure 9 and Figure 10 The diagram uses a simplified drawing of a switch to illustrate the control of the transmission path between the first input terminal and the second reference voltage Vref2 by the second switch unit 152. In practical applications, there are no restrictions on the device that controls the transmission path between the first input terminal and the second reference voltage Vref2, as long as the device can turn on and off the transmission path between the first input terminal and the second reference voltage Vref2 based on the high and low levels of the first control signal op1.

[0086] The following is Figure 7 The first positive input terminal receives the second reference voltage Vref2, and the first negative input terminal receives the first reference voltage Vref1. When the first control signal op1 is high, the transmission path between the first input terminal and the second reference voltage Vref2 is turned on; when the first control signal op1 is low, the transmission path between the first input terminal and the second reference voltage Vref2 is turned off. When the third control signal op3 is high, the transmission path between the first input terminal and the first reference voltage Vref1 is turned on; when the third control signal op3 is low, the transmission path between the first input terminal and the first reference voltage Vref1 is turned off. Taking this as an example, the second comparison unit 121 and the switching unit 112 will be described in detail.

[0087] In some embodiments, in conjunction with reference Figure 2 and Figure 7 The second comparison unit 121 includes a second positive input terminal and a second negative input terminal. The second positive input terminal receives a third reference voltage Vref3, and the second negative input terminal receives a first reference voltage Vref1. The second comparison unit 121 is configured such that: if the ambient temperature Temp is greater than the second temperature Temp2, the third reference voltage Vref3 is greater than the first reference voltage Vref1, and the second control signal op2 is at a high level; if the ambient temperature Temp is less than the second temperature Temp2, the third reference voltage Vref3 is less than the first reference voltage Vref1, and the second control signal op2 is at a low level.

[0088] Among them, reference Figure 9 The third switching unit 162 can also be configured to: if the second control signal op2 is high, turn off the transmission path between the first input terminal and the third reference voltage Vref3; if the second control signal op2 is low, turn on the transmission path between the first input terminal and the third reference voltage Vref3.

[0089] It should be noted that, in practical applications, the third switching unit 162 can also be configured such that: if the second control signal op2 is high, the transmission path between the first input terminal and the third reference voltage Vref3 is turned on; if the second control signal op2 is low, the transmission path between the first input terminal and the third reference voltage Vref3 is turned off. This will be described in detail later through another embodiment. Furthermore, Figure 9 The diagram uses a simplified drawing of a switch to illustrate the control of the transmission path between the first input terminal and the third reference voltage Vref3 by the third switch unit 162. In practical applications, there are no restrictions on the device that controls the transmission path between the first input terminal and the third reference voltage Vref3. It is only necessary that the device can turn on and off the transmission path between the first input terminal and the third reference voltage Vref3 based on the high and low levels of the second control signal op2.

[0090] The logic judgment circuit 172 includes an XOR gate circuit. If both the first control signal op1 and the second control signal op2 are high, the third control signal op3 output by the XOR gate circuit is low; if the first control signal op1 is low and the second control signal op2 is high, the third control signal op3 output by the XOR gate circuit is high; if both the first control signal op1 and the second control signal op2 are low, the third control signal op3 output by the XOR gate circuit is low.

[0091] The following combination Figure 1 , Figure 2 , Figure 7 , Figure 9 Table 1 provides a detailed explanation of the working principle of the voltage regulation circuit provided in the above embodiments.

[0092] Table 1

[0093] First control signal op1 Second control signal op2 Third control signal op3 1 1 0 0 1 1 0 0 0

[0094] If the ambient temperature Temp is greater than the first temperature Temp1, and the first reference voltage Vref1 is less than the second reference voltage Vref2 and the third reference voltage Vref3, the first control signal op1 and the second control signal op2 are at high levels, and the third control signal op3 is at a low level. At this time, the second switching unit 152 conducts the transmission path between the first input terminal and the second reference voltage Vref2 based on the high-level first control signal op1; the first switching unit 142 disconnects the transmission path between the first input terminal and the first reference voltage Vref1 based on the low-level third control signal op3; and the third switching unit 162 disconnects the transmission path between the first input terminal and the third reference voltage Vref3 based on the high-level second control signal op2. Thus, if the ambient temperature Temp is greater than the first temperature Temp1, the received second reference voltage Vref2 is used as the first input voltage Vin1 based on the control signal op.

[0095] If the ambient temperature Temp is less than the first temperature Temp1 and greater than the second temperature Temp2, and the first reference voltage Vref1 is less than the third reference voltage Vref3 and greater than the second reference voltage Vref2, the first control signal op1 is low, and the second control signal op2 and the third control signal op3 are high. At this time, the first switching unit 142 conducts the transmission path between the first input terminal and the first reference voltage Vref1 based on the high-level third control signal op3; the second switching unit 152 disconnects the transmission path between the first input terminal and the second reference voltage Vref2 based on the low-level first control signal op1; and the third switching unit 162 disconnects the transmission path between the first input terminal and the third reference voltage Vref3 based on the high-level second control signal op2. Thus, if the ambient temperature Temp is less than the first temperature Temp1 and greater than the second temperature Temp2, the received first reference voltage Vref1 is used as the first input voltage Vin1 based on the control signal op.

[0096] If the ambient temperature Temp is less than the second temperature Temp2, and the first reference voltage Vref1 is greater than the third reference voltage Vref3 and the second reference voltage Vref2, then the first control signal op1, the second control signal op2, and the third control signal op3 are all at a low level. At this time, the third switching unit 162, based on the low-level second control signal op2, opens the transmission path between the first input terminal and the third reference voltage Vref3; the first switching unit 142, based on the low-level third control signal op3, disconnects the transmission path between the first input terminal and the first reference voltage Vref1; and the second switching unit 152, based on the low-level first control signal op1, disconnects the transmission path between the first input terminal and the second reference voltage Vref2. Thus, if the ambient temperature Temp is less than the second temperature Temp2, the received third reference voltage Vref3 is used as the first input voltage Vin1 based on the control signal op.

[0097] In other embodiments, in conjunction with reference to Figure 2 and Figure 11 The second comparison unit 121 includes a second positive input terminal and a second negative input terminal. The second positive input terminal receives a first reference voltage Vref1, and the second negative input terminal receives a third reference voltage Vref3. The second comparison unit 121 is configured such that: if the ambient temperature Temp is greater than the second temperature Temp2, the first reference voltage Vref1 is less than the third reference voltage Vref3, and the second control signal op2 is low; if the ambient temperature Temp is less than the second temperature Temp2, the first reference voltage Vref1 is greater than the third reference voltage Vref3, and the second control signal op2 is high.

[0098] The third switching unit 162 can also be configured to: if the second control signal op2 is high, conduct the transmission path between the first input terminal and the third reference voltage Vref3; if the second control signal op2 is low, turn off the transmission path between the first input terminal and the third reference voltage Vref3.

[0099] Among them, reference Figure 10 The logic judgment circuit 172 may include an NOR gate circuit. If the first control signal op1 is high and the second control signal op2 is low, the third control signal op3 output by the NOR gate circuit is low; if both the first control signal op1 and the second control signal op2 are low, the third control signal op3 output by the NOR gate circuit is high; if the first control signal op1 is low and the second control signal op2 is high, the third control signal op3 output by the NOR gate circuit is low.

[0100] The following combination Figure 1 , Figure 2 , Figure 10 , Figure 11 Table 2 provides a detailed explanation of the working principle of the voltage adjustment circuit provided in the above embodiments.

[0101] Table 2

[0102] First control signal op1 Second control signal op2 Third control signal op3 1 0 0 0 0 1 0 1 0

[0103] If the ambient temperature Temp is greater than the first temperature Temp1, and the first reference voltage Vref1 is less than the second reference voltage Vref2 and the third reference voltage Vref3, the first control signal op1 is high, and the second control signal op2 and the third control signal op3 are low. At this time, the second switching unit 152 conducts the transmission path between the first input terminal and the second reference voltage Vref2 based on the high-level first control signal op1; the first switching unit 142 disconnects the transmission path between the first input terminal and the first reference voltage Vref1 based on the low-level third control signal op3; and the third switching unit 162 disconnects the transmission path between the first input terminal and the third reference voltage Vref3 based on the low-level second control signal op2. Thus, if the ambient temperature Temp is greater than the first temperature Temp1, the received second reference voltage Vref2 is used as the first input voltage Vin1 based on the control signal op.

[0104] If the ambient temperature Temp is less than the first temperature Temp1 and greater than the second temperature Temp2, and the first reference voltage Vref1 is less than the third reference voltage Vref3 and greater than the second reference voltage Vref2, then the first control signal op1 and the second control signal op2 are at low levels, and the third control signal op3 is at a high level. At this time, the first switching unit 142 conducts the transmission path between the first input terminal and the first reference voltage Vref1 based on the high-level third control signal op3; the second switching unit 152 disconnects the transmission path between the first input terminal and the second reference voltage Vref2 based on the low-level first control signal op1; and the third switching unit 162 disconnects the transmission path between the first input terminal and the third reference voltage Vref3 based on the low-level second control signal op2. Thus, if the ambient temperature Temp is less than the first temperature Temp1 and greater than the second temperature Temp2, the received first reference voltage Vref1 is used as the first input voltage Vin1 based on the control signal op.

[0105] If the ambient temperature Temp is less than the second temperature Temp2, the first reference voltage Vref1 is greater than the third reference voltage Vref3 and the second reference voltage Vref2. The second control signal op2 is high, while the first control signal op1 and the third control signal op3 are both low. At this time, the third switching unit 162, based on the high-level second control signal op2, opens the transmission path between the first input terminal and the third reference voltage Vref3. The first switching unit 142, based on the low-level third control signal op3, disconnects the transmission path between the first input terminal and the first reference voltage Vref1. The second switching unit 152, based on the low-level first control signal op1, disconnects the transmission path between the first input terminal and the second reference voltage Vref2. Thus, if the ambient temperature Temp is less than the second temperature Temp2, the received third reference voltage Vref3 is used as the first input voltage Vin1 based on the control signal op.

[0106] It should be noted that, in practical applications, the first comparison unit 111 may include a first positive input terminal and a first negative input terminal. The first positive input terminal receives a first reference voltage Vref1, and the first negative input terminal receives a second reference voltage Vref2. The first comparison unit 111 may be configured such that: if the ambient temperature Temp is greater than the first temperature Temp1 and the first reference voltage Vref1 is less than the second reference voltage Vref2, the first control signal op1 is at a low level; if the ambient temperature Temp is less than the first temperature Temp1 and the first reference voltage Vref1 is greater than the second reference voltage Vref2, the first control signal op1 is at a high level. The second switching unit 152 is configured such that: if the ambient temperature Temp is greater than the first temperature Temp1, the transmission path between the first input terminal and the second reference voltage Vref2 is turned on based on the first control signal op1; if the ambient temperature Temp is less than the first temperature Temp1, the transmission path between the first input terminal and the second reference voltage Vref2 is turned off based on the first control signal op1.

[0107] It is understood that in the first comparison unit 111 provided in one embodiment of this disclosure, there is no restriction on which input terminal of the first comparison unit 111 receives the first reference voltage Vref1 and the second reference voltage Vref2. It is sufficient that one of the first positive input terminal and the first negative input terminal receives the first reference voltage Vref1 and the other receives the second reference voltage Vref2. Similarly, in the second comparison unit 121, there is no restriction on which input terminal of the second comparison unit 121 receives the first reference voltage Vref1 and the third reference voltage Vref3. It is sufficient that one of the second positive input terminal and the second negative input terminal receives the first reference voltage Vref1 and the other receives the third reference voltage Vref3. Then, the logic judgment circuit 172 that generates the third control signal op3 based on the first control signal op1 and the second control signal op2 is adjusted. The control logic of the first switching unit 142 that turns on or off the transmission path between the first input terminal and the first reference voltage Vref1 based on the third control signal op3 is adjusted. The control logic of the second switching unit 152 that turns on or off the transmission path between the first input terminal and the second reference voltage Vref2 based on the first control signal op1 is adjusted. Alternatively, the control logic of the third switching unit 162 that turns on or off the transmission path between the first input terminal and the third reference voltage Vref3 based on the second control signal op2 is adjusted. This ensures that at any given time, only one of the first switching unit 142, the second switching unit 152, and the third switching unit 162 controls a transmission path that is in the on state.

[0108] In some embodiments, reference Figure 5 , Figure 12 and Figure 13Based on the voltage adjustment circuit including the second reference voltage supply module 103 and the third reference voltage supply module 104, the first non-inverting input terminal of the first comparison unit 111 is as follows: Figure 12 As shown, it includes multiple second-position switches 113 to provide different second reference voltages Vref2 to the first non-inverting input terminal of the first comparison unit 111 according to actual needs; the second non-inverting input terminal of the second comparison unit 121 is as follows: Figure 12 As shown, it includes multiple third-position switches 114 to provide different third reference voltages Vref3 to the second non-inverting input terminal of the second comparator unit 121 according to actual needs; and, the reference... Figure 13 Each first preset voltage has a switch on or off based on a first control signal op1 on the transmission path between the first input terminal of the voltage output module 102 and the first input terminal of the voltage output module 102. Each second preset voltage has a switch on or off based on a second control signal op2 on the transmission path between the first input terminal of the voltage output module 102 and the first input terminal of the voltage output module 102.

[0109] In summary, in the voltage adjustment circuit, the reference voltage generation module 100 generates a first reference voltage Vref1 that varies with the ambient temperature (Temp) of the clubhouse. The control signal op generated by the comparison module 101 causes the voltage output module 102 to use one of the first reference voltage Vref1, the second reference voltage Vref2, and the third reference voltage Vref3 as its first input voltage Vin1. Thus, within a certain range of ambient temperature, the voltage output module 102 uses the first reference voltage Vref1 as its first input voltage Vin1 and outputs an output voltage Vout that varies with the ambient temperature (Temp) based on the first reference voltage Vref1. Furthermore, in other ambient temperature ranges, the voltage output module 102 uses either the second reference voltage Vref2 or the third reference voltage Vref3 as its first input voltage Vin1 and outputs a fixed output voltage Vout based on the fixed value of the second reference voltage Vref2 or the third reference voltage Vref3. This achieves adjustment of the output voltage Vout based on the ambient temperature, thereby increasing the diversity of the output voltage Vout's variation.

[0110] Another embodiment of this disclosure provides a memory including the voltage regulation circuit provided in one embodiment of this disclosure. Thus, the memory can utilize the voltage regulation circuit to generate an output voltage Vout that varies based on changes in ambient temperature, thereby meeting the different power supply voltage requirements of different functional devices within the memory and improving memory performance.

[0111] In some embodiments, the memory may be a DDR memory, such as a DDR4 memory, DDR5 memory, DDR6 memory, LPDDR4 memory, LPDDR5 memory, or LPDDR6 memory.

[0112] Those skilled in the art will understand that the above embodiments are specific examples of implementing this disclosure, and in practical applications, various changes in form and detail may be made without departing from the spirit and scope of the embodiments of this disclosure. Any person skilled in the art can make their own modifications and alterations without departing from the spirit and scope of the embodiments of this disclosure; therefore, the scope of protection of the embodiments of this disclosure should be determined by the scope defined in the claims.

Claims

1. A voltage regulation circuit, characterized in that, include: A reference voltage generation module is configured to output a first reference voltage based on the ambient temperature at which the reference voltage generation module is located, wherein the first reference voltage varies with the ambient temperature. The comparison module is configured to receive a first reference voltage, a second reference voltage, and a third reference voltage, and compare the magnitudes of the first reference voltage and the second reference voltage, or compare the magnitudes of the first reference voltage and the third reference voltage, to output a control signal characterizing the comparison result, wherein the second reference voltage and the third reference voltage are different fixed values; A voltage output module receives a first reference voltage, a second reference voltage, and a third reference voltage, and uses one of the first reference voltage, the second reference voltage, and the third reference voltage as a first input voltage based on the control signal, and outputs an output voltage based on the first input voltage. The voltage output module is configured to: if the ambient temperature is greater than the first temperature, use the received second reference voltage as the first input voltage based on the control signal; If the ambient temperature is lower than the first temperature but higher than the second temperature, the received first reference voltage is used as the first input voltage based on the control signal. If the ambient temperature is lower than the second temperature, the received third reference voltage is used as the first input voltage based on the control signal; The control signal includes a first control signal and a second control signal, and the comparison module includes: The first comparison unit is configured to receive the first reference voltage and the second reference voltage, and compare the magnitudes of the first reference voltage and the second reference voltage to output the first control signal characterizing the first comparison result. The second comparison unit is configured to receive the first reference voltage and the third reference voltage, and compare the magnitudes of the first reference voltage and the third reference voltage to output a second control signal characterizing the second comparison result. The voltage output module includes: The switching unit is configured to receive the first reference voltage, the second reference voltage, and the third reference voltage, and output one of the first reference voltage, the second reference voltage, and the third reference voltage as the first input voltage based on the first control signal and the second control signal. A voltage output unit is configured to receive a first input voltage and a second input voltage and output the output voltage, wherein the second input voltage is a feedback voltage provided based on the output voltage; The voltage output unit includes a first input terminal and a second input terminal, the first input terminal receiving the first input voltage, and the second input terminal receiving the second input voltage; the switching unit includes: The first switching unit is configured to turn on or off the transmission path between the first input terminal and the first reference voltage based on the first control signal and the second control signal. The second switching unit is configured to turn on or off the transmission path between the first input terminal and the second reference voltage based on the first control signal. The third switching unit is configured to turn on or off the transmission path between the first input terminal and the third reference voltage based on the second control signal. The first control signal and the second control signal change based on the change in ambient temperature. The first switching unit includes a logic judgment circuit, which is configured to output a third control signal based on the first control signal and the second control signal. If the ambient temperature is less than the first temperature and greater than the second temperature, the output third control signal is high; if the ambient temperature is greater than the first temperature or less than the second temperature, the output third control signal is low.

2. The voltage adjustment circuit as described in claim 1, characterized in that, The reference voltage generation module is configured to increase the first reference voltage as the ambient temperature decreases.

3. The voltage adjustment circuit as described in claim 1, characterized in that, If the ambient temperature is equal to the first temperature, the first reference voltage is equal to the second reference voltage; if the ambient temperature is equal to the second temperature, the first reference voltage is equal to the third reference voltage.

4. The voltage regulation circuit as described in claim 1, characterized in that, The first switching unit is configured to: if the third control signal is high, conduct the transmission path between the first input terminal and the first reference voltage; if the third control signal is low, turn off the transmission path between the first input terminal and the first reference voltage.

5. The voltage regulation circuit as described in claim 1, characterized in that, The first comparison unit includes a first positive input terminal and a first negative input terminal. The first positive input terminal receives the second reference voltage, and the first negative input terminal receives the first reference voltage. The first comparison unit is configured to: if the ambient temperature is greater than the first temperature and the second reference voltage is greater than the first reference voltage, the first control signal is at a high level; if the ambient temperature is less than the first temperature and the second reference voltage is less than the first reference voltage, the first control signal is at a low level.

6. The voltage regulation circuit as described in claim 5, characterized in that, The second switching unit is configured to: if the first control signal is high, conduct the transmission path between the first input terminal and the second reference voltage; if the first control signal is low, turn off the transmission path between the first input terminal and the second reference voltage.

7. The voltage regulation circuit as described in claim 5, characterized in that, The second comparison unit includes a second positive input terminal and a second negative input terminal. The second positive input terminal receives the third reference voltage, and the second negative input terminal receives the first reference voltage. The second comparison unit is configured such that: if the ambient temperature is greater than the second temperature, the third reference voltage is greater than the first reference voltage, and the second control signal is high; if the ambient temperature is less than the second temperature, the third reference voltage is less than the first reference voltage, and the second control signal is low.

8. The voltage adjustment circuit as described in claim 7, characterized in that, The third switching unit is further configured to: if the second control signal is high, shut off the transmission path between the first input terminal and the third reference voltage; if the second control signal is low, turn on the transmission path between the first input terminal and the third reference voltage.

9. The voltage adjustment circuit as described in claim 7, characterized in that, The logic judgment circuit includes an XOR gate circuit. If both the first control signal and the second control signal are high, the third control signal output by the XOR gate circuit is low; if the first control signal is low and the second control signal is high, the third control signal output by the XOR gate circuit is high; if both the first control signal and the second control signal are low, the third control signal output by the XOR gate circuit is low.

10. The voltage regulation circuit as described in claim 5, characterized in that, The second comparison unit includes a second positive input terminal and a second negative input terminal. The second positive input terminal receives the first reference voltage, and the second negative input terminal receives the third reference voltage. The second comparison unit is configured such that: if the ambient temperature is greater than the second temperature, the first reference voltage is less than the third reference voltage, and the second control signal is low; if the ambient temperature is less than the second temperature, the first reference voltage is greater than the third reference voltage, and the second control signal is high.

11. The voltage regulation circuit as described in claim 10, characterized in that, The third switching unit is further configured to: if the second control signal is high, conduct the transmission path between the first input terminal and the third reference voltage; if the second control signal is low, turn off the transmission path between the first input terminal and the third reference voltage.

12. The voltage regulation circuit as described in claim 10, characterized in that, The logic judgment circuit includes a NOR gate circuit. If the first control signal is high and the second control signal is low, the third control signal output by the NOR gate circuit is low; if both the first control signal and the second control signal are low, the third control signal output by the NOR gate circuit is high; if the first control signal is low and the second control signal is high, the third control signal output by the NOR gate circuit is low.

13. The voltage regulation circuit as described in claim 1, characterized in that, The first comparison unit includes a first positive input terminal and a first negative input terminal. The first positive input terminal receives the first reference voltage, and the first negative input terminal receives the second reference voltage. The first comparison unit is configured to: if the ambient temperature is greater than the first temperature and the first reference voltage is less than the second reference voltage, the first control signal is at a low level; if the ambient temperature is less than the first temperature and the first reference voltage is greater than the second reference voltage, the first control signal is at a high level. The second switching unit is configured to: if the ambient temperature is greater than the first temperature, conduct the transmission path between the first input terminal and the second reference voltage based on the first control signal; if the ambient temperature is less than the first temperature, turn off the transmission path between the first input terminal and the second reference voltage based on the first control signal.

14. The voltage regulation circuit as described in claim 1, characterized in that, Also includes: The second reference voltage supply module includes at least two second-position switches, each second-position switch corresponding to a first preset voltage; the second reference voltage supply module is configured to selectively turn on one of the second-position switches and output the first preset voltage as the second reference voltage.

15. The voltage regulation circuit as described in claim 1, characterized in that, Also includes: The third reference voltage supply module includes at least two third-position switches, one of which corresponds to a second preset voltage; the third reference voltage supply module is configured to selectively turn on one of the third-position switches and output the second preset voltage as the third reference voltage.

16. A memory, characterized in that, Includes the voltage regulation circuit as described in any one of claims 1 to 15.

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