Voltage conversion circuit and voltage conversion system

Abstract

The utility model provides a voltage conversion circuit and a voltage conversion system, and relates to the technical field of voltage bias control. In the voltage conversion circuit, when a first bias switch is switched on, a first bias resistor is equivalently connected in parallel to two ends of a first divider resistor or a second divider resistor, so that the resistance between the output end of a voltage converter and a voltage feedback end or the resistance between the voltage feedback end of the voltage converter and the ground is reduced; therefore, the voltage of the output end of the voltage converter is pulled up or pulled down, and the bias of the output voltage of the voltage converter is realized. The voltage conversion circuit realizes output voltage bias of the voltage converter only through the first bias resistor and the first bias switch, and the cost of the first bias resistor and the first bias switch is relatively low, so that the voltage conversion circuit provided by the utility model reduces the bias cost of the output voltage of the voltage converter.

Description

Technical Field

[0001] The utility model relates to the technical field of voltage deviation control, in particular to a voltage conversion circuit and a voltage conversion system. Background Art

[0002] Currently, PVT (Process Voltage Temperature) testing is crucial for the design, development, and production of electronic devices and integrated circuits. Voltage testing primarily examines product operation under varying supply voltages, ensuring proper operation despite voltage fluctuations.

[0003] Typically, a voltage converter provides the power supply voltage to an integrated circuit (IC). Therefore, voltage testing requires voltage biasing of the converter. Currently, a common approach is to control the converter via its power management bus to achieve this. However, this requires the installation of a power management bus on the converter, which increases the cost and implementation difficulty of the converter.

[0004] Therefore, how to reduce the cost of output voltage deviation of the voltage converter is a technical problem that needs to be solved urgently. Utility Model Content

[0005] In view of this, the present invention provides a voltage conversion circuit and a voltage conversion system to reduce the cost of biasing the output voltage of the voltage converter.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] On one hand, the present application provides a voltage conversion circuit, comprising: a voltage converter, a first bias switch, a first bias resistor, and two voltage divider resistors; wherein:

[0008] The input end of the voltage converter serves as the input end of the voltage conversion circuit, and the output end of the voltage converter serves as the output end of the voltage conversion circuit;

[0009] One end of the first voltage-dividing resistor is connected to the output end of the voltage converter;

[0010] The other end of the first voltage-dividing resistor is connected to one end of the second voltage-dividing resistor, and the connection point is connected to the voltage feedback end of the voltage converter;

[0011] The other end of the second voltage-dividing resistor is grounded;

[0012] The first bias switch and the first bias resistor are connected in series, and the series branch formed is connected in parallel between two ends of one of the first voltage divider resistor and the second voltage divider resistor;

[0013] The first pull-bias switch is controlled to be on and off.

[0014] Optionally, the method further includes: a second pull-bias switch and a second pull-bias resistor; wherein:

[0015] The second bias switch and the second bias resistor are connected in series, and the series branch formed is connected in parallel between two ends of the other voltage-dividing resistor of the first voltage-dividing resistor and the second voltage-dividing resistor;

[0016] The second pull-bias switch is controlled to be on and off.

[0017] Optionally, the second pull-bias switch includes: a MOS tube, a transistor or an IGBT.

[0018] Optionally, the system further includes: at least one third pull-bias switch and at least one third pull-bias resistor; wherein:

[0019] One of the third pull-bias switch and one of the third pull-bias resistor form a group;

[0020] In each group, the third bias switch and the third bias resistor are connected in series, and the series branch formed is connected in parallel between two ends of one of the first voltage-dividing resistor and the second voltage-dividing resistor;

[0021] Each of the third pull-bias switches is controlled to be on or off.

[0022] Optionally, the system further includes: at least one fourth pull-bias switch and at least one fourth pull-bias resistor; wherein:

[0023] One of the fourth biasing switches and one of the fourth biasing resistors form a group;

[0024] In each group, the fourth bias switch and the fourth bias resistor are connected in series, and the series branch formed is connected in parallel between two ends of the first voltage divider resistor and the other voltage divider resistor of the second voltage divider resistor;

[0025] Each of the fourth pull-bias switches is controlled to be on or off.

[0026] Optionally, each of the fourth pull-bias switches includes: a MOS tube, a transistor or an IGBT.

[0027] Optionally, each of the third pull-bias switches includes: a MOS tube, a transistor or an IGBT.

[0028] Optionally, the first pull-bias switch includes: a MOS tube, a transistor or an IGBT.

[0029] On the other hand, the present application provides a voltage conversion system, comprising: at least two voltage conversion circuits as described in any one of the above aspects of the present application.

[0030] Optionally, the voltage converters in at least two of the voltage conversion circuits are combined into one voltage converter comprising at least two output terminals.

[0031] As can be seen from the above technical solution, the utility model provides a voltage conversion circuit. In this voltage conversion circuit, since when the first pull-bias switch is turned on, the first pull-bias resistor is equivalent to being connected in parallel to the two ends of the first voltage-dividing resistor or the second voltage-dividing resistor, the resistance between the output end of the voltage converter and the voltage feedback end or the resistance between the voltage feedback end of the voltage converter and the ground is reduced, so that the voltage at the output end of the voltage converter is pulled up or pulled down, thereby achieving the pull-bias of the output voltage of the voltage converter. Since the voltage conversion circuit only achieves the pull-bias of the output voltage of the voltage converter through the first pull-bias resistor and the first pull-bias switch, and the cost of the first pull-bias resistor and the first pull-bias switch is relatively low, the voltage conversion circuit provided by the present application reduces the cost of pulling the output voltage of the voltage converter. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are merely embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying any creative work.

[0033] Figures 1-8 Schematic diagrams of the structures of eight implementations of the voltage conversion circuit provided in the embodiments of the present application;

[0034] Figure 9 A schematic structural diagram of an implementation scheme of a voltage conversion system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0036] In this application, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of additional identical elements in the process, method, article, or apparatus comprising the element.

[0037] In order to reduce the cost of output voltage deviation of the voltage converter, the embodiment of the present application provides a voltage conversion circuit, the specific structure of which is as follows: Figure 1 or Figure 2 As shown, it specifically includes: a voltage converter 10, a first pull-bias switch M1, a first pull-bias resistor RL1 and two voltage-dividing resistors R1 and R2; the connection relationship between each component is as follows:

[0038] The input terminal of the voltage converter 10 serves as the input terminal of the voltage conversion circuit, and the output terminal OUT of the voltage converter 10 serves as the output terminal of the voltage conversion circuit.

[0039] One end of the first voltage-dividing resistor R1 is connected to the output terminal OUT of the voltage converter 10. The other end of the first voltage-dividing resistor R1 is connected to one end of the second voltage-dividing resistor R2, and the connection point is connected to the voltage feedback terminal FB of the voltage converter 10. The other end of the second voltage-dividing resistor R2 is grounded GND.

[0040] The first pull-bias switch M1 and the first pull-bias resistor RL1 are connected in series.

[0041] In a specific example, Figure 1 As shown, a series branch formed by the first pull-bias switch M1 and the first pull-bias resistor RL1 is connected in parallel between the two ends of the first voltage-dividing resistor R1.

[0042] In another specific example, Figure 2 As shown, a series branch formed by the first pull-bias switch M1 and the first pull-bias resistor RL1 is connected in parallel between the two ends of the second voltage-dividing resistor R2.

[0043] The above two examples show two implementation methods of the series branch formed by the first pull-bias switch M1 and the first pull-bias resistor RL1. No specific limitation is made here and it can be determined according to the specific situation. All of them are within the protection scope of this application.

[0044] The first pull-bias switch M1 is controlled to be on and off.

[0045] Optionally, the first pull-bias switch M1 can be a MOS tube, a triode, or an IGBT. In practical applications, including but not limited to these, no specific limitation is made here and it can be determined according to the specific situation, all of which are within the protection scope of this application.

[0046] exist Figure 1 In the voltage conversion circuit shown, when the first pull-off switch M1 is turned on, the first pull-off resistor RL1 is effectively connected in parallel between the two terminals of the first voltage-divider resistor R1. Therefore, the output voltage VOUT at the output terminal OUT of the voltage converter 10 is calculated as VFB × [1 + (R1 / / RL1) / R2]. Here, VFB is the voltage at the voltage feedback terminal FB of the voltage converter 10, R1 is the resistance of the first voltage-divider resistor, R2 is the resistance of the second voltage-divider resistor, and RL1 is the resistance of the first pull-off resistor.

[0047] Since the first pull-up resistor RL1 is connected in parallel with the first voltage divider resistor R1 at this time, the parallel resistance R1 / / RL1 of the first pull-up resistor RL1 and the first voltage divider resistor R1 is less than R1 at this time. Therefore, the output voltage VOUT of the output terminal OUT of the voltage converter 10 will be reduced at this time, that is, the output voltage lowering function of the voltage converter 10 is realized at this time.

[0048] exist Figure 2 In the voltage conversion circuit shown, when the first pull-off switch M1 is turned on, the first pull-off resistor RL1 is effectively connected in parallel between the two terminals of the second voltage-divider resistor R2. Therefore, the output voltage VOUT at the output terminal OUT of the voltage converter 10 is calculated as VFB × [1 + R1 / (R2 / / RL1)]. Here, VFB is the voltage at the voltage feedback terminal FB of the voltage converter 10, R1 is the resistance of the first voltage-divider resistor, R2 is the resistance of the second voltage-divider resistor, and RL1 is the resistance of the first pull-off resistor.

[0049] Since the first pull-up resistor RL1 and the second voltage-dividing resistor R2 are connected in parallel at this time, the parallel resistance R2 / / RL1 of the first pull-up resistor RL1 and the second voltage-dividing resistor R2 is less than R2. Therefore, the output voltage VOUT of the output terminal OUT of the voltage converter 10 will increase at this time, that is, the output voltage pull-up function of the voltage converter 10 is realized at this time.

[0050] In this embodiment, when the first bias switch M1 is turned on, the first bias resistor RL1 is equivalent to being connected in parallel across the first voltage divider resistor R1 or the second voltage divider resistor R2. Therefore, at this time, the resistance between the output terminal OUT of the voltage converter 10 and the voltage feedback terminal FB or the resistance between the voltage feedback terminal FB of the voltage converter 10 and the ground GND is reduced, so that the voltage at the output terminal OUT of the voltage converter 10 is pulled up or pulled down, thereby achieving the output voltage bias of the voltage converter 10. In addition, since the voltage conversion circuit achieves the output voltage bias of the voltage converter 10 only through the first bias resistor RL1 and the first bias switch M1, and the cost of the first bias resistor RL1 and the first bias switch M1 is relatively low, the voltage conversion circuit provided in this application reduces the cost of output voltage bias of the voltage converter 10.

[0051] Furthermore, because the voltage conversion circuit utilizes a pull-off resistor and a pull-off switch to achieve output voltage pull-off of the voltage converter 10, the voltage conversion circuit can achieve output voltage pull-off of the voltage converter 10 without powering down, significantly accelerating the progress of PVT testing. Furthermore, the voltage conversion circuit can dynamically control the output voltage of the voltage converter 10. Furthermore, the control logic of the voltage conversion circuit is simple, and the structure is easy to implement. Furthermore, the circuit is also conducive to automation and remote control.

[0052] Another embodiment of the present application provides another implementation of the voltage conversion circuit. The specific structure of this implementation is as follows: Figure 3 ( Figure 3 Only in Figure 1 As shown in FIG, this embodiment further includes: a second pull-off switch M2 and a second pull-off resistor RL2 based on the above embodiment. The connection relationship between the various components is as follows:

[0053] The second pull-bias switch M2 and the second pull-bias resistor RL2 are connected in series, and the series branch formed is connected in parallel between the two ends of the other voltage-dividing resistor of the first voltage-dividing resistor R1 and the second voltage-dividing resistor R2.

[0054] In a specific example, the connection method of the first pull-bias resistor RL1 and the first pull-bias switch M1 is as follows: Figure 1 As shown, Figure 3 As shown, the series branch formed by the second bias switch M2 and the second bias resistor RL2 is connected in parallel between the two ends of the second voltage-dividing resistor R2.

[0055] In another specific example, the connection method of the first pull-bias resistor RL1 and the first pull-bias switch M1 is as follows: Figure 2 As shown, Figure 4As shown, the series branch formed by the second pull-bias switch M2 and the second pull-bias resistor RL2 is connected in parallel between the two ends of the first voltage-dividing resistor R1.

[0056] The above two examples show two implementation methods of the series branch formed by the second pull-bias switch M2 and the second pull-bias resistor RL2. No specific limitation is made here and it can be determined according to the specific situation. All of them are within the protection scope of this application.

[0057] The second pull-bias switch M2 is controlled to be on and off.

[0058] Optionally, the second pull-bias switch M2 can be a MOS tube, a triode, or an IGBT. In practical applications, including but not limited to these, no specific limitation is made here and it can be determined according to the specific situation, all of which are within the scope of protection of this application.

[0059] exist Figure 3 In the voltage conversion circuit shown in FIG, the working principle of the second pull-bias switch M2 and the second pull-bias resistor RL2 is the same as that of FIG. Figure 2 The working principles of the first pull-up switch M1 and the first pull-up resistor RL1 are the same, that is, the second pull-up switch M2 and the second pull-up resistor RL2 can realize the output voltage pulling-up function of the voltage converter 10, which will not be repeated here.

[0060] exist Figure 4 In the voltage conversion circuit shown in FIG, the working principle of the second pull-bias switch M2 and the second pull-bias resistor RL2 is the same as that of FIG. Figure 1 The working principles of the first pull-bias switch M1 and the first pull-bias resistor RL1 are the same, that is, the second pull-bias switch M2 and the second pull-bias resistor RL2 can realize the function of pulling down the output voltage of the voltage converter 10, which will not be repeated here.

[0061] It should be noted that the second bias switch M2 cannot be turned on at the same time as the first bias switch M1 to avoid simultaneously pulling up and down the output voltage VOUT of the output terminal OUT of the voltage converter 10 .

[0062] In this embodiment, since the first pull-bias switch M1, the first pull-bias resistor RL1, the second pull-bias switch M2 and the second pull-bias resistor RL2 are provided at the same time, the voltage conversion circuit provided in this embodiment can both lower the output voltage of the voltage converter 10 and raise the output voltage of the voltage converter 10, thereby making the voltage conversion circuit applicable to more test situations.

[0063] Another embodiment of the present application provides another implementation of the voltage conversion circuit. The specific structure of this implementation is as follows: Figure 5 ( Figure 5 Only in Figure 3Based on the third pull-bias switch M3 and the third pull-bias resistor RL3 as an example) or Figure 6 ( Figure 6 Only in Figure 3 Based on the above embodiment, this embodiment further includes: at least one third pull-off switch M3 and at least one third pull-off resistor RL3. The connection relationship between the components is as follows:

[0064] A third pull-off switch M3 and a third pull-off resistor RL3 form a group. In each group, the third pull-off switch M3 and the third pull-off resistor RL3 are connected in series, and the series branch formed is connected in parallel between the two ends of one of the first and second divider resistors R1 and R2.

[0065] In a specific example, in each group, a series branch formed by the third pull-bias switch M3 and the third pull-bias resistor RL3 is connected in parallel between two ends of the first voltage-dividing resistor R1.

[0066] For example, take a group as an example, that is, take a third pull-bias switch M3 and a third pull-bias resistor RL3 as an example. Figure 5 As shown, a series branch formed by the third bias switch M3 and the third bias resistor RL3 is connected in parallel between the two ends of the first voltage-dividing resistor R1.

[0067] In another specific example, in each group, a series branch formed by the third pull-bias switch M3 and the third pull-bias resistor RL3 is connected in parallel between two ends of the second voltage-dividing resistor R2.

[0068] For example, take a group as an example, that is, take a third pull-bias switch M3 and a third pull-bias resistor RL3 as an example. Figure 6 As shown, a series branch formed by the third pull-bias switch M3 and the third pull-bias resistor RL3 is connected in parallel between the two ends of the second voltage-dividing resistor R2.

[0069] The above two examples show two implementation methods of the series branch formed by the third pull-in switch M3 and the third pull-in resistor RL3 in each group. No specific limitation is made here and it can be determined according to the specific situation. All of them are within the protection scope of this application.

[0070] Each third pull-bias switch M3 is controlled to be on or off.

[0071] Optionally, each third pull-bias switch M3 can be a MOS tube, a triode, or an IGBT. In practical applications, this includes but is not limited to this. No specific limitation is made here and it can be determined according to the specific situation. It is all within the protection scope of this application.

[0072] exist Figure 5In the voltage conversion circuit shown in FIG, the working principle of the third pull-bias switch M3 and the third pull-bias resistor RL3 is the same as that of FIG. Figure 1 The first bias switch M1 and first bias resistor RL1 in FIG. 1 and FIG. 2 operate in the same manner, namely, the third bias switch M3 and third bias resistor RL3 can be used to lower the output voltage of voltage converter 10, which will not be further described here. Furthermore, since the third bias resistor RL3 may be different from the first bias resistor RL1, the amount by which the third bias resistor RL3 lowers the output voltage of voltage converter 10 may be different from that of the first bias resistor RL1.

[0073] It should be noted that in Figure 5 In the voltage conversion circuit shown, each third pull-bias switch M3 cannot be turned on at the same time as the second pull-bias switch M2, so as to avoid pulling up the output voltage VOUT of the output terminal OUT of the voltage converter 10 and pulling down the output voltage VOUT of the output terminal OUT of the voltage converter 10 at the same time.

[0074] exist Figure 6 In the voltage conversion circuit shown in FIG, the working principle of the third pull-bias switch M3 and the third pull-bias resistor RL3 is the same as that of FIG. Figure 2 The first bias switch M1 and first bias resistor RL1 in FIG. 1 and FIG. 2 operate in the same manner, namely, the third bias switch M3 and third bias resistor RL3 can be used to increase the output voltage of the voltage converter 10, which will not be further described here. Furthermore, since the third bias resistor RL3 may be different from the second bias resistor RL2, the amount by which the third bias resistor RL3 increases the output voltage of the voltage converter 10 may be different from that of the second bias resistor RL2.

[0075] It should be noted that in Figure 6 In the voltage conversion circuit shown, each third pull-bias switch M3 cannot be turned on at the same time as the first pull-bias switch M1 to avoid pulling up and down the output voltage VOUT of the output terminal OUT of the voltage converter 10 at the same time.

[0076] In this embodiment, at least two series branches formed by the pull-bias resistor and the pull-bias switch are connected in parallel at both ends of the first voltage-dividing resistor R1 or the second voltage-dividing resistor R2. Figure 5 In the embodiment, two series branches formed by a pull-bias resistor and a pull-bias switch are connected in parallel at both ends of the first voltage-dividing resistor R1, so that pull-bias control of different voltage values ​​of the output voltage of the voltage converter 10 can be achieved, thereby making the voltage conversion circuit applicable to more test situations.

[0077] Another embodiment of the present application provides another implementation of the voltage conversion circuit. The specific structure of this implementation is as follows: Figure 7 ( Figure 7 Only in Figure 5 Based on the fourth pull-bias switch M4 and the fourth pull-bias resistor RL4 as an example) or Figure 8 ( Figure 8 Only in Figure 6 As shown in the example of a fourth pull-down switch and a fourth pull-down resistor RL4, this embodiment, based on the previous embodiment, further includes: at least one fourth pull-down switch M4 and at least one fourth pull-down resistor RL4. The connection relationship between the various components is as follows:

[0078] A fourth pull-off switch M4 and a fourth pull-off resistor RL4 form a group. In each group, the fourth pull-off switch M4 and the fourth pull-off resistor RL4 are connected in series, and the series branch formed is connected in parallel between the two ends of the other voltage divider resistor of the first voltage divider resistor R1 and the second voltage divider resistor R2.

[0079] In a specific example, in each group, the series branch formed by the third pull-bias switch M3 and the third pull-bias resistor RL3 is connected in parallel between the two ends of the first voltage divider resistor R1, and in each group, the series branch formed by the fourth pull-bias switch M4 and the fourth pull-bias resistor RL4 is connected in parallel between the two ends of the second voltage divider resistor R2.

[0080] For example, taking a third pull-bias switch M3, a third pull-bias resistor RL3, a fourth pull-bias switch M4 and a fourth pull-bias resistor RL4 as an example, Figure 7 As shown, the series branch formed by the third pull-bias switch M3 and the third pull-bias resistor RL3 is connected in parallel between the two ends of the first voltage-dividing resistor R1, and the series branch formed by the fourth pull-bias switch M4 and the fourth pull-bias resistor RL4 is connected in parallel between the two ends of the second voltage-dividing resistor R2.

[0081] In another specific example, in each group, the series branch formed by the third pull-bias switch M3 and the third pull-bias resistor RL3 is connected in parallel between the two ends of the second voltage divider resistor R2, and in each group, the series branch formed by the fourth pull-bias switch M4 and the fourth pull-bias resistor RL4 is connected in parallel between the two ends of the first voltage divider resistor R1.

[0082] For example, taking a third pull-bias switch M3, a third pull-bias resistor RL3, a fourth pull-bias switch M4 and a fourth pull-bias resistor RL4 as an example, Figure 8 As shown, the series branch formed by the third pull-bias switch M3 and the third pull-bias resistor RL3 is connected in parallel between the two ends of the second voltage-dividing resistor R2, and the series branch formed by the fourth pull-bias switch M4 and the fourth pull-bias resistor RL4 is connected in parallel between the two ends of the first voltage-dividing resistor R1.

[0083] The above two examples show two implementation methods of the series branch formed by the fourth pull-in switch M4 and the fourth pull-in resistor RL4 in each group. No specific limitation is made here and it can be determined according to the specific situation. All of them are within the protection scope of this application.

[0084] Each fourth pull-bias switch M4 is controlled to be on or off.

[0085] Optionally, each fourth pull-bias switch M4 can be a MOS tube, a triode, or an IGBT. In practical applications, this includes but is not limited to these. No specific limitation is made here and it can be determined according to the specific circumstances. All are within the protection scope of this application.

[0086] exist Figure 7 In the voltage conversion circuit shown in FIG, the working principle of the fourth pull-bias switch M4 and the fourth pull-bias resistor RL4 is the same as that of FIG. Figure 2 The first bias switch M1 and the first bias resistor RL1 in FIG. 1 and FIG. 2 operate in the same manner, namely, the fourth bias switch M4 and the fourth bias resistor RL4 can be used to increase the output voltage of the voltage converter 10, which will not be further described here. Furthermore, since the fourth bias resistor RL4 may be different from the second bias resistor RL2, the amount by which the fourth bias resistor RL4 reduces the output voltage of the voltage converter 10 may be different from that of the second bias resistor RL2.

[0087] It should be noted that in Figure 7 In the voltage conversion circuit shown, each fourth pull-bias switch M4 cannot be turned on at the same time as the first pull-bias switch M1 to avoid pulling up and down the output voltage VOUT of the output terminal OUT of the voltage converter 10 at the same time.

[0088] exist Figure 8 In the voltage conversion circuit shown in FIG, the working principle of the fourth pull-bias switch M4 and the fourth pull-bias resistor RL4 is the same as that of FIG. Figure 1 The first bias switch M1 and the first bias resistor RL1 in FIG. 1 and FIG. 2 operate in the same manner, namely, the fourth bias switch M4 and the fourth bias resistor RL4 can be used to lower the output voltage of the voltage converter 10, which will not be further described here. Furthermore, since the fourth bias resistor RL4 may be different from the first bias resistor RL1, the amount by which the fourth bias resistor RL4 increases the output voltage of the voltage converter 10 may be different from that of the first bias resistor RL1.

[0089] It should be noted that in Figure 8In the voltage conversion circuit shown, each fourth pull-bias switch M4 cannot be turned on at the same time as the second pull-bias switch M2 to avoid pulling up the output voltage VOUT of the output terminal OUT of the voltage converter 10 and pulling down the output voltage VOUT of the output terminal OUT of the voltage converter 10 at the same time.

[0090] In this embodiment, since at least one third pull-bias switch M3, at least one third pull-bias resistor RL3, at least one fourth pull-bias switch M4, and a fourth pull-bias resistor RL4 are provided at the same time, the voltage conversion circuit provided in this embodiment can not only realize the pull-up control of different voltage values ​​of the output voltage of the voltage converter 10, but also realize the pull-down control of different voltage values ​​of the output voltage of the voltage converter 10, for example, + / -3%, + / -5%, etc., so that the voltage conversion circuit can be applied to more test situations.

[0091] Another embodiment of the present application provides a voltage conversion system, which specifically includes: at least two voltage conversion circuits provided by the above embodiments.

[0092] In a specific example, the voltage converters in each voltage conversion circuit are independently provided.

[0093] In another specific example, the voltage converters in at least two voltage conversion circuits are merged into one voltage converter including at least two output terminals.

[0094] For example, taking the voltage conversion system including two voltage conversion circuits as an example, the voltage converters in the two voltage conversion circuits are combined into a voltage converter with two output terminals. The voltage converter with two output terminals is specifically as follows: Figure 9 shown.

[0095] The above two examples illustrate the configuration of the voltage converters in each voltage conversion circuit. No specific limitation is made here and the configuration may be determined according to the specific circumstances and is within the scope of protection of this application.

[0096] It should be noted that the specific structure of the voltage conversion circuit has been described in detail in the above embodiment and will not be repeated here.

[0097] For the above description of the disclosed embodiments, the features recorded in each embodiment in this specification can be replaced or combined with each other, so that professional and technical personnel in this field can implement or use this application. The above description is only a preferred embodiment of the present utility model, and does not limit the present utility model in any form. Although the present utility model has been disclosed as above with a preferred embodiment, it is not used to limit the present utility model. Any technician familiar with the field can make many possible changes and modifications to the technical solution of the present utility model using the methods and technical contents disclosed above without departing from the scope of the technical solution of the present utility model, or modify it into an equivalent embodiment of equivalent changes. Therefore, any simple modification, equivalent change and modification made to the above embodiments based on the technical essence of the present utility model without departing from the content of the technical solution of the present utility model still falls within the scope of protection of the technical solution of the present utility model.

Claims

1. A voltage conversion circuit, characterized in that: include: A voltage converter, a first bias switch, a first bias resistor, and two voltage divider resistors; wherein: The input end of the voltage converter serves as the input end of the voltage conversion circuit, and the output end of the voltage converter serves as the output end of the voltage conversion circuit; One end of the first voltage-dividing resistor is connected to the output end of the voltage converter; The other end of the first voltage-dividing resistor is connected to one end of the second voltage-dividing resistor, and the connection point is connected to the voltage feedback end of the voltage converter; The other end of the second voltage-dividing resistor is grounded; The first bias switch and the first bias resistor are connected in series, and the series branch formed is connected in parallel between two ends of one of the first voltage divider resistor and the second voltage divider resistor; The first pull-bias switch is controlled to be on and off.

2. The voltage conversion circuit according to claim 1, wherein: Also includes: The second pull-bias switch and the second pull-bias resistor; wherein: The second bias switch and the second bias resistor are connected in series, and the series branch formed is connected in parallel between two ends of the other voltage-dividing resistor of the first voltage-dividing resistor and the second voltage-dividing resistor; The second pull-bias switch is controlled to be on and off.

3. The voltage conversion circuit according to claim 2, wherein: The second pull-bias switch includes: a MOS tube, a triode or an IGBT.

4. The voltage conversion circuit according to claim 1, wherein: Also includes: At least one third pull-bias switch and at least one third pull-bias resistor; wherein: One of the third pull-bias switch and one of the third pull-bias resistor form a group; In each group, the third bias switch and the third bias resistor are connected in series, and the series branch formed is connected in parallel between two ends of one of the first voltage-dividing resistor and the second voltage-dividing resistor; Each of the third pull-bias switches is controlled to be on or off.

5. The voltage conversion circuit according to claim 4, wherein: Also includes: At least one fourth pull-bias switch and at least one fourth pull-bias resistor; wherein: One of the fourth biasing switches and one of the fourth biasing resistors form a group; In each group, the fourth bias switch and the fourth bias resistor are connected in series, and the series branch formed is connected in parallel between two ends of the first voltage divider resistor and the other voltage divider resistor of the second voltage divider resistor; Each of the fourth pull-bias switches is controlled to be on or off.

6. The voltage conversion circuit according to claim 5, characterized in that: Each of the fourth bias switches includes a MOS tube, a triode or an IGBT.

7. The voltage conversion circuit according to claim 4, wherein: Each of the third pull-bias switches includes a MOS tube, a triode or an IGBT.

8. The voltage conversion circuit according to any one of claims 1 to 7, characterized in that: The first pull-bias switch includes: a MOS tube, a triode or an IGBT.

9. A voltage conversion system, characterized in that: include: At least two voltage conversion circuits according to any one of claims 1 to 8.

10. The voltage conversion system according to claim 9, wherein: The voltage converters in at least two of the voltage conversion circuits are merged into one voltage converter including at least two output terminals.

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