Voltage regulator

Abstract

This voltage regulator comprises: a current source that outputs a reference current and a second current with respect to an input voltage or an output voltage; a load resistor that conducts a load current generated by combining one or more current sources; and a pass transistor controlled by the reference current, the second current, and the load current, wherein the voltage regulator maintains the output voltage stably and controls a constant voltage value according to fluctuations in the input voltage.

Description

Constant voltage device

[0001] The present invention relates to a constant voltage device, and more specifically, to a constant voltage device that maintains an output voltage stably and controls a constant voltage value according to fluctuations in an input voltage.

[0002]

[0003] Related to the present invention, there is a constant voltage device in the related art. Patent Document 1, a nonvolatile semiconductor memory device and a constant voltage generation circuit thereof, can prevent transient overcharging of a bit line immediately after activation of a constant voltage generation circuit control signal, and can prevent the occurrence of a soft write phenomenon or a decrease in read speed. In addition, Patent Document 2, a constant voltage generation circuit and a semiconductor memory device can generate a high output voltage even when the power supply voltage drops. In addition, Patent Document 3, a constant voltage generation device can quickly and stably recover an output voltage when the output voltage fluctuates due to a change in load current.

[0004]

[0005] [Prior Art Literature]

[0006] [Patent Document]

[0007] Patent Registration No. 10-0295564 (July 12, 2001)

[0008] Patent Registration No. 10-0464897 (January 7, 2005)

[0009] Patent Publication No. 10-2015-0031054 (March 23, 2015)

[0010]

[0011] The present invention aims to provide a constant voltage device that stabilizes an output voltage by forming a constant voltage feedback loop using a current source without using a conventional error amplifier.

[0012]

[0013] The present invention aims to provide a constant voltage device that stabilizes an output voltage by forming a constant voltage feedback loop using a current source without using a conventional error amplifier.

[0014] In addition, the current source is characterized by having an input voltage as input.

[0015] In addition, the current source is characterized by having an output voltage as an input.

[0016] In addition, the constant voltage device is characterized by including a reference voltage unit that outputs a reference voltage compared to an input voltage; a comparator that compares the reference voltage and the output voltage to output a control voltage; an RC filter that filters the control voltage and outputs the filtered control voltage; and a pass transistor controlled by the filtered control voltage.

[0017] In addition, the RC filter is characterized in that it is replaced with a load resistor and an LC filter.

[0018] In addition, the output voltage is characterized in that it is distributed.

[0019] In addition, the reference voltage unit is characterized by receiving an output voltage.

[0020] Additionally, the voltage regulator is characterized by including a Schmitt trigger for triggering an output voltage; an RC filter for filtering the triggered voltage; and a pass transistor controlled by the filtered voltage.

[0021] In addition, the Schmitt trigger is characterized by being a digital Schmitt trigger or an analog Schmitt trigger.

[0022]

[0023] The present invention can have the effect of stabilizing the output voltage and controlling the constant voltage value according to fluctuations in the input voltage by configuring a constant voltage feedback loop using a current source without using a conventional error amplifier, thereby stabilizing the output voltage.

[0024]

[0025] Figure 1 is an exemplary diagram showing a first embodiment of a conventional constant voltage device.

[0026] Figure 2 is an exemplary diagram showing a second embodiment of a conventional constant voltage device.

[0027] Figure 3 is an exemplary diagram showing a first embodiment of a constant voltage device of the present invention.

[0028] Figure 4 is an exemplary diagram showing a second embodiment of a constant voltage device of the present invention.

[0029] Figure 5 is an exemplary diagram showing a third embodiment of a constant voltage device of the present invention.

[0030] Figure 6 is an exemplary diagram showing a fourth embodiment of a constant voltage device of the present invention.

[0031] Fig. 7 is an exemplary diagram showing a fifth embodiment of a constant voltage device of the present invention.

[0032] Figure 8 is an exemplary diagram showing a sixth embodiment of a constant voltage device of the present invention.

[0033] Figure 9 is an exemplary diagram showing a seventh embodiment of a constant voltage device of the present invention.

[0034] Fig. 10 is an exemplary diagram showing an eighth embodiment of a constant voltage device of the present invention.

[0035] Fig. 11 is an exemplary diagram showing a ninth embodiment of a constant voltage device of the present invention.

[0036] Fig. 12 is an exemplary diagram showing a tenth embodiment of a constant voltage device of the present invention.

[0037] Fig. 13 is an exemplary diagram showing an 11th embodiment of a constant voltage device of the present invention.

[0038] Fig. 14 is an exemplary diagram showing a twelfth embodiment of a constant voltage device of the present invention.

[0039] Fig. 15 is an exemplary diagram showing a 13th embodiment of a constant voltage device of the present invention.

[0040] Fig. 16 is an exemplary diagram showing a 14th embodiment of a constant voltage device of the present invention.

[0041] Fig. 17 is an exemplary diagram showing the gate voltage of a pass transistor in a constant voltage device of the present invention.

[0042] Fig. 18 is an exemplary diagram showing a 15th embodiment of a constant voltage device of the present invention.

[0043] Fig. 19 is an exemplary diagram showing a 16th embodiment of a constant voltage device of the present invention.

[0044] Figure 20 is an exemplary diagram showing a 17th embodiment of a constant voltage device of the present invention.

[0045] Fig. 21 is an exemplary diagram showing an 18th embodiment of a constant voltage device of the present invention.

[0046] Figure 22 is an exemplary diagram showing a 19th embodiment of a constant voltage device of the present invention.

[0047] Figure 23 is an exemplary diagram showing a current source applied to the constant voltage device of the present invention.

[0048]

[0049] Hereinafter, a voltage regulator according to a preferred embodiment of the present invention will be described in detail with reference to the drawings. Descriptions of previously known matters will be omitted or simplified to clarify the gist of the present invention. The components included in the description of the present invention operate individually or in a combined configuration.

[0050] Figure 1 is an exemplary diagram showing a first embodiment of a conventional constant voltage device.

[0051] Referring to FIG. 1, the voltage regulator includes an error amplifier (30) that compares a reference voltage (20) and an output voltage, and a pass transistor (10) that is controlled by the output of the error amplifier (30) and transfers the input voltage to the output voltage.

[0052] The voltage regulator is composed of an error amplifier (30) and a pass transistor (10), and is connected through a feedback loop to stabilize and control the output voltage.

[0053] The error amplifier (30) plays an important role in the feedback loop of the voltage regulator, and compares the reference voltage (20) and the output voltage to amplify the error (difference) of the output voltage, and the error represents the difference between the desired output voltage and the current output voltage. The output of the error amplifier (30) controls the pass transistor (10) with the amplified error signal and is transmitted to the gate of the pass transistor, thereby regulating the output voltage. If the output voltage is different from the reference voltage, the error amplifier (30) detects the difference and generates a control signal to control the operation of the pass transistor, thereby maintaining the output voltage at the desired value.

[0054] The pass transistor (10) transfers the input voltage to the output voltage and operates according to a control signal controlled by the error amplifier (30). The pass transistor (10), controlled by the output of the error amplifier (30), regulates the output voltage and maintains a constant voltage value. The constant voltage device transfers the output signal of the error amplifier (10) to the gate of the pass transistor, thereby allowing the pass transistor (10) to regulate the input voltage and minimize the error of the output voltage.

[0055] An error amplifier (30) and a pass transistor (10) are connected through a feedback loop, which monitors the output voltage and detects the difference from the constant voltage to perform the necessary adjustments. The constant voltage device maintains the output voltage stable even when the input voltage fluctuates and controls the constant voltage value.

[0056] Figure 2 is an exemplary diagram showing a second embodiment of a conventional constant voltage device.

[0057] Referring to FIG. 2, the voltage regulator includes an error amplifier (30) that compares a reference voltage (20) and a division voltage of an output voltage, and a pass transistor (10) that is controlled by the output of the error amplifier (30) and transfers the input voltage to the output voltage.

[0058] The voltage regulator is composed of an error amplifier (30) and a pass transistor (10), and is connected through a feedback loop to stabilize and control the output voltage.

[0059] The error amplifier (30) plays an important role in the feedback loop of the voltage regulator, and compares the reference voltage (20) and the divider voltage of the output voltage to amplify the error (difference) of the output voltage, and the error represents the difference between the desired output voltage and the current output voltage. The output of the error amplifier controls the pass transistor (10) as an amplified value of the error signal, and is transmitted to the gate of the pass transistor (10), thereby regulating the output voltage. If the output voltage is different from the reference voltage or the divider voltage, the error amplifier (30) detects the difference and generates a control signal to control the operation of the pass transistor (10) to maintain the output voltage at a desired value.

[0060] The pass transistor (10) transfers the input voltage to the output voltage and operates according to a control signal controlled by the error amplifier (30). The pass transistor (10) controlled by the output of the error amplifier (30) adjusts the input voltage to minimize the error of the output voltage, and transfers the output signal of the error amplifier (30) to the gate of the pass transistor (10), thereby adjusting the output voltage to match the reference voltage or the divided voltage.

[0061] An error amplifier (30) and a pass transistor (10) are connected through a feedback loop, which monitors the output voltage and detects the difference from the reference voltage or the divided voltage to perform the necessary adjustment. The voltage regulator maintains the output voltage stable according to fluctuations in the input voltage and controls the constant voltage value.

[0062] Figure 3 is an exemplary diagram showing a first embodiment of a constant voltage device of the present invention.

[0063] Referring to FIG. 3, the constant voltage device includes a first current source (21) that outputs a reference current compared to an input voltage to the gate of a pass transistor (10); a second current source (22) that inputs a second current compared to the output voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current that is a difference between the reference current and the second current; and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

[0064] The first current source (21) is one of the important components of the feedback loop, and outputs a reference current relative to the input voltage to the gate of the pass transistor (10). In the feedback loop, the first current source (21) serves to set an accurate value of the output voltage and provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

[0065] The second current source (22) is a component of another feedback loop, and inputs a second current relative to the output voltage at the gate of the pass transistor (10). In the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage, and the output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

[0066] The load resistor (Rj) plays a very important role in the feedback loop, and carries the load current, which is the difference between the reference current and the secondary current. Within the feedback loop, the output of the load resistor (Rj) affects the first current source (21) and the second current source (22), thereby regulating and stabilizing the output voltage.

[0067] The pass transistor (10) is a key component that transfers the input voltage to the output voltage, and in the feedback loop, the pass transistor (10) is controlled by the outputs of the first current source (21), the second current source (22), and the load resistor (Rj), accurately regulates the input voltage to the output voltage, and achieves the main goal of the constant voltage device. The pass transistor (10) is an NMOS, NPN TR.

[0068] The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable according to the fluctuation of the input voltage and controls the voltage regulator value.

[0069] Even if the input voltage changes, the reference current is always constant V J It flows into the point. At this time, assuming that the input voltage increases, the output voltage V that passes through the pass transistor (10) out This increases. At this time, the second current source, I2, also increases due to the increased output voltage.

[0070] Here, I J =I ref -I2, the increase in the second current source is I J Reduces .

[0071] Accordingly, V J =I J R J The voltage is lowered. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V JWhen this is lowered, the pass transistor (10) is controlled (resistance change occurs), which results in the output voltage V being raised again. out It plays a role in lowering the voltage. At this time, the pass transistor (10) used is NMOS, NPN TR.

[0072] As a result, this lowered output voltage again reduces the second current source, I2.

[0073] And again I J is increased (V J (The output voltage also increases) and this is performed continuously (repeatedly) to maintain a stable output voltage.

[0074] On the other hand, the opposite case is as follows: the reference current is always constant V even when the input voltage changes. J It flows into the point. At this time, assuming that the input voltage is reduced, the output voltage V passing through the pass transistor (10) out This is reduced. At this time, the second current source, I2, also decreases due to the reduced output voltage.

[0075] Here, I J =I ref -I2, the decrease in the second current source is I J Increases.

[0076] Accordingly, V J =I J R J The voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V J When this rises, the pass transistor (10) is controlled (resistance change occurs), which results in the output voltage V again. out It plays a role in increasing the level. At this time, the pass transistor (10) used is NMOS, NPN TR.

[0077] Consequently, this increased output voltage again increases the second current source, I2.

[0078] And again I J is reduced (V J (The output voltage also decreases) and this is performed continuously (repeatedly) to maintain a stable output voltage.

[0079] Figure 4 is an exemplary diagram showing a second embodiment of a constant voltage device of the present invention.

[0080] Referring to FIG. 4, the constant voltage device includes a first current source (21) that inputs a reference current compared to an input voltage at the gate of a pass transistor (10); a second current source (22) that outputs a second current compared to an output voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current that is a difference between the reference current and the second current at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

[0081] The first current source (21) is one of the important components of the feedback loop, and inputs a reference current compared to the input voltage to the gate of the pass transistor (10), and in the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage. The first current source (21) provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

[0082] The second current source (22) is a component of another feedback loop, which outputs a second current relative to the output voltage to the gate of the pass transistor (10), and in the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage. The output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

[0083] The load resistor (Rj) plays a very important role in the feedback loop, and flows a load current, which is the difference between the reference current and the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) affects the first current source (21) and the second current source (22), and controls the input voltage to the gate of the pass transistor (10) and regulates the output voltage.

[0084] The pass transistor (10) is a key component that transfers the input voltage to the output voltage, and in the feedback loop, the pass transistor (10) is controlled by the outputs of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) precisely regulates the input voltage to the output voltage to achieve the goal of the constant voltage device.

[0085] The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj) and the pass transistor (10), and the voltage regulator maintains the output voltage stable according to the fluctuation of the input voltage and controls the voltage regulator value.

[0086] Even if the input voltage changes, the reference current is always constant V J It flows out from the point. At this time, assuming that the input voltage increases, the output voltage V that passes through the pass transistor (10) out This increases. At this time, the second current source, I2, also increases due to the increased output voltage.

[0087] Here, I J =I2-I ref However, the increase in the second current source is I J Increases.

[0088] Accordingly, V J =I J R J The voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V JAs this increases, the pass transistor (10) is controlled (resistance change occurs), which results in the output voltage V again. out It plays a role in lowering the voltage. At this time, the pass transistor (10) used is PMOS, PNP TR.

[0089] As a result, this lowered output voltage again reduces the second current source, I2. And again, I J is reduced (V J (The output voltage is lowered and then the output voltage is increased again) and this is performed continuously (repeatedly) to maintain a stable output voltage.

[0090] On the other hand, the opposite case is as follows: the reference current is always constant V even when the input voltage changes. J It flows out from the point. At this time, assuming that the input voltage is reduced, the output voltage V that passes through the pass transistor (10) out This is reduced. At this time, the second current source, I2, also decreases due to the reduced output voltage.

[0091] Here, I J =I2-I ref However, the decrease in the second current source is I J Reduces .

[0092] Accordingly, V J =I J R J The voltage is lowered. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V J When this is lowered, the pass transistor (10) is controlled (resistance change occurs), which results in the output voltage V being raised again. out It plays a role in increasing the level. At this time, the pass transistor (10) used is PMOS, PNP TR.

[0093] As a result, this increased output voltage again increases the second current source, I2. And again, I J is increased (VJ (The output voltage increases and then decreases again) and this is performed continuously (repeatedly) to maintain a stable output voltage.

[0094] Figure 5 is an exemplary diagram showing a third embodiment of a constant voltage device of the present invention.

[0095] Referring to FIG. 5, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an input voltage; a comparator (23) that compares the reference voltage and an output voltage to a gate of a pass transistor (10) and outputs a control voltage; a load resistor (Rj) that flows a load current compared to the control voltage at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

[0096] The reference voltage unit (20) is one of the core components of the constant voltage device, and generates and outputs a reference voltage. Within the feedback loop, the reference voltage acts as a reference value for the desired output voltage, is compared with the control voltage generated by the comparator (23), and is used to regulate the output voltage.

[0097] The comparator (23) is an important part of the feedback loop of the voltage regulator, and generates a control voltage by comparing the reference voltage and the output voltage with the gate of the pass transistor (10). In the feedback loop, the comparator (23) monitors the output voltage and detects the difference from the reference voltage, and the difference is amplified into a control voltage and used to control the pass transistor (10).

[0098] The load resistor (Rj) is an important component within the feedback loop, and flows the load current relative to the control voltage at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and if necessary, the value of the load resistor is adjusted to control the load current and stabilize the output voltage.

[0099] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the control voltage generated by the comparator (23) and the output of the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0100] The feedback loop detects changes in the output voltage and performs necessary adjustments through interactions between the reference voltage unit (20), comparator (23), load resistor (Rj), and pass transistor (10), and the constant voltage device maintains the output voltage stably according to fluctuations in the input voltage and maintains the desired constant voltage value.

[0101] Even if the input voltage changes, the reference voltage is always constant, V out I depending on voltage J =(V ref -V fb )G m is variable. Here, assuming that the input voltage increases, the output voltage V passing through the pass transistor (10) out This increases. At this time, G m Output current, I J decreases. (Since the reference voltage is fixed, when the feedback voltage increases, G m The output current of the device decreases)

[0102] Accordingly, V J =I J R J The voltage is lowered. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V J When this is lowered, the pass transistor (10) is controlled (resistance change occurs), which results in the output voltage V being raised again. out It plays a role in lowering the voltage. At this time, the pass transistor (10) used is NMOS, NPN TR.

[0103] As a result, the output voltage is lowered again. J is increased (VJ (The output voltage also increases) and this is performed continuously (repeatedly) to maintain a stable output voltage.

[0104] Meanwhile, the reference voltage is always constant even if the input voltage changes, V out I depending on voltage J =(V ref -V fb )G m is variable. Here, assuming that the input voltage is reduced, the output voltage V passing through the pass TR out This decreases. At this time, G m Output current, I J increases. (Since the reference voltage is fixed, when the feedback voltage increases, G m The output current increases)

[0105] Accordingly, V J =I J R J The voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V J As this increases, the pass TR is controlled (resistance changes), which in turn results in the output voltage V out It plays a role of increasing the level. At this time, the pass transistor (10) used is NMOS, NPN TR.

[0106] As a result, the output voltage increased this way again I J Reduces (V J (The output voltage also decreases) and this is performed continuously (repeatedly) to maintain a stable output voltage.

[0107] Also, R J Instead, capacitors and inductors can be used. In reality, even capacitors can be used to make semiconductor chips.

[0108] Figure 6 is an exemplary diagram showing a fourth embodiment of a constant voltage device of the present invention.

[0109] Referring to FIG. 6, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an input voltage; a comparator (23) that compares a division voltage of the reference voltage and an output voltage to a gate of a pass transistor (10) and outputs a control voltage; a load resistor (Rj) that flows a load current compared to the control voltage at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

[0110] The reference voltage unit (20) is one of the core components of the constant voltage device, and generates and outputs a reference voltage. Within the feedback loop, the reference voltage acts as a reference value for the desired output voltage, is compared with the control voltage generated by the comparator (23), and is used to regulate the output voltage.

[0111] The comparator (23) is an important part of the feedback loop of the voltage regulator, and generates a control voltage by comparing the reference voltage and the output voltage division voltage with the gate of the pass transistor (10). In the feedback loop, the comparator (23) monitors the output voltage and detects the difference from the reference voltage, and the difference is amplified as a control voltage and used to control the pass transistor (10).

[0112] The load resistor (Rj) is an important component within the feedback loop, and flows the load current relative to the control voltage at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and if necessary, the value of the load resistor is adjusted to control the load current and stabilize the output voltage.

[0113] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the control voltage generated by the comparator (23) and the output of the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0114] The feedback loop detects changes in the output voltage and performs necessary adjustments through interactions between the reference voltage unit (20), comparator (23), load resistor (Rj), and pass transistor (10), and the constant voltage device maintains the output voltage stably according to fluctuations in the input voltage and maintains the desired constant voltage value.

[0115] Fig. 7 is an exemplary diagram showing a fifth embodiment of a constant voltage device of the present invention.

[0116] Referring to FIG. 7, the constant voltage device includes a first current source (21) that outputs a reference current compared to an input voltage to the gate of a pass transistor (10); a second current source (22) that inputs a second current compared to the input voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current that is a difference between the reference current and the second current to the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

[0117] The first current source (21) is one of the important components of the feedback loop, and outputs a reference current relative to the input voltage to the gate of the pass transistor (10). In the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage, and the first current source (21) provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

[0118] The second current source (22) is a component of another feedback loop, and inputs a second current relative to the input voltage at the gate of the pass transistor (10). In the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage, and the output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

[0119] The load resistor (Rj) plays a very important role in the feedback loop, and flows a load current, which is the difference between the reference current and the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) affects the first current source (21) and the second current source (22), and regulates the operation of the pass transistor (10) to stabilize the output voltage.

[0120] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the outputs of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0121] The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable according to the fluctuation of the input voltage and controls the voltage regulator value.

[0122] Figure 8 is an exemplary diagram showing a sixth embodiment of a constant voltage device of the present invention.

[0123] Referring to FIG. 8, the constant voltage device includes a first current source (21) that inputs a reference current compared to an input voltage to the gate of a pass transistor (10); a second current source (22) that outputs a second current compared to the input voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current that is a difference between the reference current and the second current to the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

[0124] The first current source (21) is one of the important components of the feedback loop, and inputs a reference current in comparison to the input voltage at the gate of the pass transistor (10), and in the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage. The first current source (21) provides a reference current to the gate of the pass transistor to control the operation of the pass transistor (10).

[0125] The second current source (22) is a component of another feedback loop, which outputs a second current relative to the input voltage to the gate of the pass transistor (10), and in the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage. The output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

[0126] The load resistor (Rj) plays a very important role in the feedback loop, and flows the load current, which is the difference between the reference current and the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and if necessary, the value of the load resistor (Rj) is adjusted to control the load current and stabilize the output voltage.

[0127] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the outputs of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0128] The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable according to the fluctuation of the input voltage and controls the voltage regulator value.

[0129] Figure 9 is an exemplary diagram showing a seventh embodiment of a constant voltage device of the present invention.

[0130] Referring to FIG. 9, the constant voltage device includes a first current source (21) that outputs a reference current compared to an output voltage to the gate of a pass transistor (10); a second current source (22) that inputs a second current compared to the output voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current that is a difference between the reference current and the second current to the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

[0131] The first current source (21) is one of the important components of the feedback loop, and outputs a reference current relative to the output voltage to the gate of the pass transistor (10). Within the feedback loop, the first current source (21) plays a role in setting the exact value of the output voltage. The first current source (21) provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

[0132] The second current source (22) is a component of another feedback loop, which inputs a second current relative to the output voltage at the gate of the pass transistor (10), and in the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage. The output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

[0133] The load resistor (Rj) plays a very important role in the feedback loop, and flows the load current, which is the difference between the reference current and the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and if necessary, the value of the load resistor is adjusted to control the load current and stabilize the output voltage.

[0134] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the outputs of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0135] The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable according to the fluctuation of the input voltage and controls the voltage regulator value.

[0136] Fig. 10 is an exemplary diagram showing an eighth embodiment of a constant voltage device of the present invention.

[0137] Referring to FIG. 10, the constant voltage device includes a first current source (21) that inputs a reference current compared to an output voltage at the gate of a pass transistor (10); a second current source (22) that outputs a second current compared to an output voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is a difference between the reference current and the second current, at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

[0138] The first current source (21) is one of the important components of the feedback loop, and inputs a reference current in comparison to the output voltage at the gate of the pass transistor (10), and in the feedback loop, the first current source (21) plays a role in setting an accurate value of the output voltage. The first current source (21) provides a reference current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

[0139] The second current source (22) is a component of another feedback loop, which outputs a second current relative to the output voltage to the gate of the pass transistor (10), and in the feedback loop, the second current source (22) works together with the first current source (21) to achieve precise setting of the output voltage. The output of the second current source (22) serves to regulate the input voltage to the gate of the pass transistor (10).

[0140] The load resistor (Rj) plays a very important role in the feedback loop, and flows the load current, which is the difference between the reference current and the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and if necessary, the value of the load resistor is adjusted to control the load current and stabilize the output voltage.

[0141] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the outputs of the first current source (21), the second current source (22), and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0142] The feedback loop monitors the change in the output voltage and performs the necessary adjustment by controlling the interaction between the first current source (21), the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable according to the fluctuation of the input voltage and controls the voltage regulator value.

[0143] Fig. 11 is an exemplary diagram showing a ninth embodiment of a constant voltage device of the present invention.

[0144] Referring to FIG. 11, the constant voltage device includes a second current source (22) that outputs a second current relative to the output voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows the second current, that is, the load current, from the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

[0145] The second current source (22) is one of the important components of the feedback loop, and outputs a second current relative to the output voltage to the gate of the pass transistor (10), and within the feedback loop, the second current source (22) plays a role in setting an accurate value of the output voltage. The second current source (22) provides a second current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

[0146] The load resistor (Rj) plays a very important role in the feedback loop, and flows the load current, which is the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and by adjusting the value of the load resistor (Rj), the load current is controlled and the output voltage is stabilized.

[0147] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the second current source (22) and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0148] The feedback loop monitors changes in the output voltage and performs necessary adjustments by controlling the interaction between the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable and controls the constant voltage value according to fluctuations in the input voltage.

[0149] Assuming that there is no change in the input voltage, this is only the case when there is a change in the output load. If the output load increases, the output voltage decreases, and the second current source, I2, also decreases. Here, I2 = I J am.

[0150] Accordingly, V J =I J R J The voltage is lowered. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V J When this is lowered, the pass transistor (10) is controlled (resistance change occurs), which results in the output voltage V being raised again. out It plays a role of increasing the voltage. At this time, the pass transistor (10) used is PMOS, PNP TR.

[0151] Consequently, this increased output voltage again increases the second current source, I2.

[0152] And again I J is increased (V J (The output voltage increases and the output voltage decreases). This is characterized by continuously (repeatedly) performing this to maintain a stable output voltage. It can be said to be the simplest circuit configuration.

[0153] Meanwhile, assuming no change in input voltage, this is only the case when there is a change in output load. If the output load decreases, the output voltage increases, and the second current source, I2, also increases.

[0154] Accordingly, V J =I J R J The voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V J When this increases, it controls the pass transistor (10) (causing a change in resistance), which in turn results in the output voltage V again. outIt plays a role of lowering. At this time, the pass transistor (10) used is PMOS, PNP TR.

[0155] As a result, this lowered output voltage again reduces the second current source, I2.

[0156] And again I J is reduced (V J (The output voltage is lowered and the output voltage is increased) This is performed continuously (repeatedly) to maintain a stable output voltage. It can be said to be the simplest circuit configuration.

[0157] Fig. 12 is an exemplary diagram showing a tenth embodiment of a constant voltage device of the present invention.

[0158] Referring to FIG. 12, the constant voltage device includes a second current source (22) that inputs a second current compared to the output voltage at the gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is the second current, at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

[0159] The second current source (22) is one of the important components of the feedback loop, and inputs a second current compared to the output voltage at the gate of the pass transistor (10), and within the feedback loop, the second current source (22) plays a role in setting an accurate value of the output voltage. The second current source (22) provides a second current to the gate of the pass transistor (10) to control the operation of the pass transistor (10).

[0160] The load resistor (Rj) plays a very important role in the feedback loop, and flows the load current, which is the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and by adjusting the value of the load resistor (Rj), the load current is controlled and the output voltage is stabilized.

[0161] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the second current source (22) and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0162] The feedback loop monitors changes in the output voltage and performs necessary adjustments by controlling the interaction between the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable and controls the constant voltage value according to fluctuations in the input voltage.

[0163] Fig. 13 is an exemplary diagram showing an 11th embodiment of a constant voltage device of the present invention.

[0164] Referring to FIG. 13, the constant voltage device includes a second current source (22) that outputs a second current relative to the input voltage to the gate of the pass transistor (10); a load resistor (Rj) that flows a second current, that is, a load current, from the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to the output voltage.

[0165] The second current source (22) is one of the important components of the feedback loop, and outputs a second current relative to the input voltage to the gate of the pass transistor (10), and within the feedback loop, the second current source (22) plays a role in setting an accurate value of the output voltage. The second current source (22) provides a second current to the gate of the pass transistor (10) to control the operation of the pass transistor.

[0166] The load resistor (Rj) plays a very important role in the feedback loop, and flows the load current, which is the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and by adjusting the value of the load resistor (Rj), the load current is controlled and the output voltage is stabilized.

[0167] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the second current source (22) and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0168] The feedback loop monitors changes in the output voltage and performs necessary adjustments by controlling the interaction between the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable and controls the constant voltage value according to fluctuations in the input voltage.

[0169] Assuming that there is no change in the load voltage, this is only the case when there is a change in the input. If the input increases, the output voltage increases, and the second current source, I2, also increases. Here, I2 = I J am.

[0170] Accordingly, V J =I J R J The voltage increases. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V J As this increases, the pass TR is controlled (resistance changes), which in turn results in the output voltage V out It plays a role in lowering the voltage. At this time, the pass transistor (10) used is PMOS, PNP TR.

[0171] As a result, the output voltage is lowered. However, because the input voltage is high, the second current source, I2, is immediately increased.

[0172] And again I J is increased (V J (The output voltage increases and the output voltage decreases). This is characterized by continuously (repeatedly) performing this to maintain a stable output voltage. It can be said to be the simplest circuit configuration.

[0173] On the other hand, assuming that there is no change in the load voltage, this is only the case when there is a change in the input. If the input decreases, the output voltage decreases, and the second current source, I2, also decreases. Here, I2 = I J am.

[0174] Accordingly, V J =I J R J The voltage is lowered. This voltage controls the gate or base voltage of the pass element, MOS or BJT. That is, V J When this is lowered, it controls the pass transistor (10) (causing a change in resistance), which in turn results in the output voltage V again. out It plays a role of increasing the voltage. At this time, the pass transistor (10) used is PMOS, PNP TR.

[0175] As a result, the output voltage increases. However, the second current source, I2, of the input is immediately reduced due to the low input voltage change.

[0176] And again I J is reduced (V J (The output voltage is lowered and the output voltage is increased) This is performed continuously (repeatedly) to maintain a stable output voltage. It can be said to be the simplest circuit configuration.

[0177] Fig. 14 is an exemplary diagram showing a twelfth embodiment of a constant voltage device of the present invention.

[0178] Referring to FIG. 14, the constant voltage device includes a second current source (22) that inputs a second current compared to an input voltage at the gate of the pass transistor (10); a load resistor (Rj) that flows a load current, which is a second current, at the gate of the pass transistor (10); and a pass transistor (10) that is controlled by the output of the load resistor (Rj) and transfers the input voltage to an output voltage.

[0179] The second current source (22) is one of the important components of the feedback loop, and inputs a second current relative to the input voltage at the gate of the pass transistor (10). Within the feedback loop, the second current source (22) plays a role in setting an accurate value of the output voltage. The second current source (22) provides a second current to the gate of the pass transistor (10) to control the operation of the pass transistor.

[0180] The load resistor (Rj) plays a very important role in the feedback loop, and flows the load current, which is the second current, at the gate of the pass transistor (10). Within the feedback loop, the output of the load resistor (Rj) is related to the output voltage, and by adjusting the value of the load resistor (Rj), the load current is controlled and the output voltage is stabilized.

[0181] The pass transistor (10) is a main component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the second current source (22) and the load resistor (Rj). The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0182] The feedback loop monitors changes in the output voltage and performs necessary adjustments by controlling the interaction between the second current source (22), the load resistor (Rj), and the pass transistor (10), and the voltage regulator maintains the output voltage stable and controls the constant voltage value according to fluctuations in the input voltage.

[0183] It cannot be realized when the direction of the current is reversed.

[0184] In the above invention R J can be realized using other passive components. That is, it is characterized by being able to create an output voltage using a capacitor or an inductor instead of a resistor. That is, V out =J m I J R J

[0185] Vout =J m I J Z CJ

[0186] Z CJ =(1 / 2πC)T, the voltage is 0 at the beginning and gradually charges as time passes.

[0187] V out =J m I J Z LJ

[0188] Z LJ =(2πL)T, the voltage is infinite at the beginning and gradually decreases as time passes.

[0189] Here, this is another completely new configuration. The constant voltage device can be configured with completely new constant voltage characteristics by introducing inductors and capacitors. This allows for the design of high-power devices.

[0190] Fig. 15 is an exemplary diagram showing a 13th embodiment of a constant voltage device of the present invention.

[0191] Referring to FIG. 15, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an input voltage; a comparator (23) that compares the reference voltage and the output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transfers the input voltage to the output voltage.

[0192] The reference voltage unit (20) is one of the core components of the constant voltage device and outputs a reference voltage compared to the input voltage. The reference voltage is used as a setting value for the desired output voltage, and the output is compared with the reference voltage.

[0193] The comparator (23) compares the reference voltage and the output voltage to output a control voltage, and is one of the core elements of the feedback loop, monitoring the output voltage and comparing it with the reference voltage to generate a control voltage.

[0194] The RC filter filters the control voltage, reducing fluctuations and providing smooth control. The output of the RC filter smooths out fluctuations in the control voltage and improves stability.

[0195] The pass transistor (10) is a key component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0196] The feedback loop monitors changes in the output voltage and adjusts the control voltage through a comparator (23) to maintain the desired output voltage. The RC filter stabilizes and smooths the control voltage, and the voltage regulator maintains the output voltage stable and controls the constant voltage value according to fluctuations in the input voltage.

[0197] Figure 16 is an exemplary diagram showing a 14th embodiment of a constant voltage device of the present invention.

[0198] Referring to FIG. 16, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an input voltage; a comparator (23) that compares a division voltage of the reference voltage and an output voltage and outputs a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transfers the input voltage to the output voltage.

[0199] The reference voltage unit (20) is one of the core components of the constant voltage device and outputs a reference voltage compared to the input voltage. The reference voltage is used as a setting value for the desired output voltage, and the output is compared with the reference voltage.

[0200] The comparator (23) outputs a control voltage by comparing the reference voltage and the divided voltage of the output voltage, and is one of the core elements of the feedback loop, monitoring the output voltage and comparing it with the reference voltage to generate a control voltage.

[0201] The RC filter filters the control voltage, reducing fluctuations and providing smooth control. The output of the RC filter smooths out fluctuations in the control voltage and improves stability.

[0202] The pass transistor (10) is a key component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0203] The feedback loop monitors changes in the output voltage and adjusts the control voltage through a comparator (23) to maintain the desired output voltage. The RC filter stabilizes and smooths the control voltage, and the voltage regulator maintains the output voltage stable and controls the constant voltage value according to fluctuations in the input voltage.

[0204] Fig. 17 is an exemplary diagram showing the gate voltage of a pass transistor in a constant voltage device of the present invention.

[0205] Referring to Figure 17, the gate voltage of the pass transistor repeatedly rises and falls depending on the on / off of the pass transistor.

[0206] The gate voltage of the pass transistor (10) repeatedly changes according to the on / off operation of the pass transistor (10).

[0207] In the initial state, the pass transistor (10) is in an inactive state (off), so the gate voltage is at a low level, and the output voltage should be equal to or very close to the constant voltage.

[0208] When the output load fluctuates due to load change, the feedback loop of the voltage regulator detects this, and the feedback loop checks the change in the output voltage through the comparator and increases the gate voltage of the pass transistor to adjust the control voltage.

[0209] As the gate voltage increases, the feedback loop increases the gate voltage of the pass transistor (10), thereby activating (turning on) the pass transistor (10). The input voltage will try to regulate and increase the output voltage.

[0210] When the gate voltage rises in output stabilization and the pass transistor (10) is activated, the output voltage is regulated and stabilized.

[0211] The feedback loop continuously adjusts the gate voltage until the output approaches the reference voltage.

[0212] In a stable state, the gate voltage is regulated so that the pass transistor (10) is kept on. The output voltage is stabilized to a desired value, and the gate voltage is maintained.

[0213] If the output load changes again during load change and readjustment, the feedback loop again adjusts the gate voltage to stabilize the output. The process is repeated continuously.

[0214] The gate voltage of the pass transistor (10) continuously fluctuates according to the operation of the feedback loop, thereby controlling the output voltage to a desired value.

[0215] Fig. 18 is an exemplary diagram showing a 15th embodiment of a constant voltage device of the present invention.

[0216] Referring to FIG. 18, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an output voltage; a comparator (23) that compares the reference voltage and the output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transfers the input voltage to the output voltage.

[0217] The reference voltage unit (20) is one of the core components of the constant voltage device, outputs a reference voltage compared to the output voltage, and the reference voltage is used as a setting value for the desired output voltage, and the output is compared with the reference voltage.

[0218] The comparator (23) compares the reference voltage and the output voltage to output a control voltage. The comparator (23) is one of the core elements of the feedback loop, monitors the output voltage, compares it with the reference voltage, and generates a control voltage.

[0219] The RC filter filters the control voltage, reducing fluctuations and providing smooth control. The output of the RC filter smooths out fluctuations in the control voltage and improves stability.

[0220] The pass transistor (10) is a key component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0221] The feedback loop monitors changes in the output voltage and adjusts the control voltage via a comparator (23) to maintain the desired output voltage. The RC filter stabilizes and smooths the control voltage, and the voltage regulator detects fluctuations in the output voltage and adjusts the control voltage by comparing it to a reference voltage to maintain the desired output voltage. This maintains a stable output voltage despite fluctuations in the input voltage.

[0222] Fig. 19 is an exemplary diagram showing a 16th embodiment of a constant voltage device of the present invention.

[0223] Referring to FIG. 19, the constant voltage device includes a reference voltage unit (20) that outputs a reference voltage compared to an output voltage; a comparator (23) that compares a division voltage of the reference voltage and the output voltage and outputs a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transfers an input voltage to an output voltage.

[0224] The reference voltage unit (20) is one of the core components of the constant voltage device, and generates a reference voltage compared to the output voltage, and the reference voltage is used as a setting value for the desired output voltage.

[0225] The comparator (23) generates a control voltage by comparing the reference voltage and the divided voltage of the output voltage, and is an important part of the feedback loop, monitoring the output voltage and measuring the difference from the reference voltage to generate the control voltage.

[0226] The RC filter filters the control voltage to smooth it, improve the stability of the feedback loop, and reduce unstable fluctuations.

[0227] The pass transistor (10) is a key component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0228] The feedback loop monitors changes in the output voltage and adjusts the control voltage via a comparator (23) to maintain the desired output voltage. The RC filter stabilizes and smooths this control voltage, and the voltage regulator detects fluctuations in the output voltage and adjusts the control voltage by comparing it to a reference voltage to maintain the desired output voltage. This maintains a stable output voltage despite fluctuations in the input voltage.

[0229] Figure 20 is an exemplary diagram showing a 17th embodiment of a constant voltage device of the present invention.

[0230] Referring to FIG. 20, the voltage regulator includes a Schmitt trigger (24) that triggers an output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transmits an input voltage to an output voltage.

[0231] A Schmitt trigger (Schmitt trigger) is a type of nonlinear logic gate that triggers an output voltage to output a control voltage. It has the characteristic of switching the output voltage when the input voltage exceeds a certain threshold. This characteristic provides stability against noise or fluctuating inputs. The Schmitt trigger (24) is used in a feedback loop to generate a control voltage and trigger an output based on the previous output state.

[0232] The RC filter filters the control voltage. As a low-pass filter, it removes high-frequency noise and rapid voltage fluctuations, generating a stabilized control voltage. The filtering characteristics of the RC filter are determined by the time constant RC, and the output of the RC filter is used to improve the stability and accuracy of the feedback loop.

[0233] The pass transistor (10) plays a role in transferring the input voltage to the output voltage, and receives a control voltage at the gate, appropriately amplifies or stabilizes the input voltage, and then transfers it to the output. The pass transistor (10) regulates the flow of current according to the control voltage to maintain the output voltage at the desired value.

[0234] In connection with the feedback loop, the Schmitt trigger (24) monitors changes in the input voltage, the RC filter improves the stability of the control voltage, and the pass transistor (10) ultimately generates and maintains the desired output voltage.

[0235] Fig. 21 is an exemplary diagram showing an 18th embodiment of a constant voltage device of the present invention.

[0236] Referring to FIG. 21, the voltage regulator includes a digital Schmitt trigger (25) that triggers an output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transmits an input voltage to an output voltage.

[0237] The digital Schmitt trigger (25) triggers the output voltage to generate a control voltage and is an important part of the feedback loop, monitoring fluctuations in the output voltage and generating a control voltage when it detects a change above a certain threshold.

[0238] The RC filter filters the control voltage to smooth it, improve the stability of the feedback loop, and reduce unstable fluctuations.

[0239] The pass transistor (10) is a key component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0240] The feedback loop monitors fluctuations in the output voltage and generates a control voltage via a digital Schmitt trigger (25) to maintain the desired output voltage. The RC filter stabilizes and smooths the control voltage, and the voltage regulator detects fluctuations in the output voltage and maintains a stable output voltage via the digital Schmitt trigger (25) and the RC filter. The voltage regulator maintains a stable output voltage despite fluctuations in the input voltage.

[0241] Figure 22 is an exemplary diagram showing a 19th embodiment of a constant voltage device of the present invention.

[0242] Referring to FIG. 22, the voltage regulator includes an analog Schmitt trigger (26) that triggers an output voltage to output a control voltage; an RC filter that filters the control voltage; and a pass transistor (10) that is controlled by the output of the RC filter and transmits an input voltage to an output voltage.

[0243] The analog Schmitt trigger (26) triggers the output voltage to generate a control voltage. It is an important part of the feedback loop, monitoring fluctuations in the output voltage and generating a control voltage when it detects a change above a certain threshold. The analog Schmitt trigger (26) converts an analog input signal into a digital signal and generates a control voltage based on the digital signal.

[0244] The RC filter filters the control voltage to smooth it, improve the stability of the feedback loop, and reduce unstable fluctuations.

[0245] The pass transistor (10) is a key component that transfers the input voltage to the output voltage, is controlled through a feedback loop, and is controlled by the output of the RC filter. The pass transistor (10) regulates the input voltage to maintain the output voltage at a desired value.

[0246] The feedback loop monitors fluctuations in the output voltage and generates a control voltage via an analog Schmitt trigger (26) to maintain the desired output voltage. The RC filter stabilizes and smooths this control voltage, and the voltage regulator detects fluctuations in the output voltage and maintains a stable output voltage via the analog Schmitt trigger (26) and the RC filter. The voltage regulator maintains a stable output voltage despite fluctuations in the input voltage.

[0247] Figure 23 is an exemplary diagram showing a current source applied to the constant voltage device of the present invention.

[0248] Referring to FIG. 23, (a) of FIG. 23 shows a current mirror that flows a reference current relative to the output voltage or input voltage, (b) of FIG. 23 shows a triple current mirror that flows a reference current relative to the output voltage or input voltage, and (c) of FIG. 23 shows a transistor that flows a reference current relative to the output voltage or input voltage.

[0249] A current mirror flows a reference current relative to the output or input voltage, and typically consists of one or more transistors and a resistor. When a reference current is injected into one transistor, the transistor helps replicate the reference current. The replicated reference current flows depending on the input or output voltage.

[0250] A triple current mirror is an extended version of the current mirror, which performs more precise current replication. It typically uses three transistors, which are interconnected to replicate the current at a constant rate. This provides more precise control and stability in constant-voltage devices. A triple current mirror enables accurate current replication in constant-voltage devices.

[0251] A transistor is a semiconductor device that controls current by adjusting its gate voltage based on the output or input voltage. Transistors conduct current, and the gate voltage controls the flow of current. Transistors replicate or regulate current to generate a desired output voltage or control the input voltage. In voltage regulators, transistors are used to regulate current and stabilize voltage.

[0252] Current mirrors, triple current mirrors, and transistors play an important role in the feedback loop and control system of the voltage regulator. Current mirrors and triple current mirrors are used to replicate and stabilize current, and transistors are used to control current and voltage.

[0253] The present invention is not limited to the specific preferred embodiments described above, and anyone with ordinary skill in the art to which the invention pertains can make various modifications without departing from the gist of the present invention claimed in the claims, and such modifications are within the scope of the claims.

[0254]

[0255] [Explanation of symbols]

[0256] 10: Pass transistor

[0257] 20: Reference voltage section

[0258] 21: First current source

[0259] 22: Second current source

[0260] 23: Comparator

[0261] 24: Schmidt Trigger

[0262] 25: Digital Schmitt Trigger

[0263] 26: Analog Schmitt Trigger

[0264] 30: Error amplifier

Claims

1. A current source that outputs a reference current and a second current compared to the input voltage or output voltage; A load resistor that flows a load current generated by combining one or more of the above current sources; and A constant voltage device, characterized by including a pass transistor controlled by the reference current, the second current, and the load current.

2. In paragraph 1, The above current source is a constant voltage device characterized in that it takes an input voltage as input.

3. In paragraph 1, The above current source is a constant voltage device characterized in that it takes an output voltage as an input.

4. Reference voltage section that outputs a reference voltage compared to the input voltage; A comparator that compares the reference voltage and the output voltage and outputs a control voltage; An RC filter that filters the above control voltage and outputs the filtered control voltage; and A constant voltage device, characterized by including a pass transistor controlled by a filtered control voltage.

5. In paragraph 4, A constant voltage device, characterized in that the RC filter is replaced with a load resistor and an LC filter.

6. In paragraph 4, A constant voltage device, characterized in that the above output voltage is distributed.

7. In paragraph 4, A constant voltage device, characterized in that the above reference voltage unit receives an output voltage.

8. Schmitt trigger to trigger the output voltage; RC filter that filters the triggered voltage; A constant voltage device, characterized by including a pass transistor controlled by a filtered voltage.

9. In paragraph 8, A constant voltage device, characterized in that the above Schmitt trigger is a digital Schmitt trigger or an analog Schmitt trigger.

Images