CN217718523U - Voltage compensation circuit and device - Google Patents
Voltage compensation circuit and device Download PDFInfo
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- CN217718523U CN217718523U CN202220274536.2U CN202220274536U CN217718523U CN 217718523 U CN217718523 U CN 217718523U CN 202220274536 U CN202220274536 U CN 202220274536U CN 217718523 U CN217718523 U CN 217718523U
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Abstract
The utility model discloses a voltage compensation circuit and device, this voltage compensation circuit includes: a comparison circuit and a compensation circuit; the comparison circuit is respectively connected with the voltage stabilizing circuit and the compensation circuit, and the compensation circuit is connected with the load circuit; the comparison circuit is used for receiving the output voltage of the voltage stabilizing circuit, comparing the output voltage with a reference voltage and outputting a compensation signal to the compensation circuit when the reference voltage is greater than the output voltage; and the compensation circuit is used for compensating the output voltage of the voltage stabilizing circuit when receiving the compensation signal. Because the utility model discloses when voltage stabilizing circuit's output voltage is less than reference voltage, compensate voltage stabilizing circuit's output voltage to avoided the load end chip because the required current increase appears falling the electric restart, and then improved the stability of circuit.
Description
Technical Field
The utility model relates to the field of electronic technology, especially, relate to a voltage compensation circuit and device.
Background
Currently, a Low Dropout Regulator (LDO) is used in various circuits as a common power supply. However, some circuits have a characteristic that the current is small during standby and suddenly increases after wake-up, thereby causing a drop in the output voltage. Because the output current of the LDO power supply suddenly increases, the output current of an NPN power triode in the LDO needs to be adjusted in a transient state, the voltage adjustment is a feedback process, and the transient adjustment needs time, so that when the output current of the LDO and the capacitance of a load end cannot completely provide a large current with instantaneous change of the load, the voltage of the output end of the LDO can be reduced, and if the load comprises a chip, the voltage of the output end can be reduced to be lower than the normal working voltage of the chip of the load end sometimes, and the chip of the load end is restarted in a power failure mode.
The above is only for the purpose of assisting understanding of the technical solutions of the present invention, and does not represent an admission that the above is the prior art.
SUMMERY OF THE UTILITY MODEL
A primary object of the present invention is to provide a voltage compensation circuit and device, which aims to solve the problem of the prior art that when the LDO is used in various circuits as a common power supply, the load end is powered down and restarted due to the increase of the current required by the load, thereby affecting the normal working state of the circuit.
In order to achieve the above object, the present invention provides a voltage compensation circuit, the voltage compensation circuit includes: a comparison circuit and a compensation circuit;
the comparison circuit is respectively connected with the voltage stabilizing circuit and the compensation circuit, and the compensation circuit is connected with the load circuit;
the comparison circuit is used for receiving the output voltage of the voltage stabilizing circuit, comparing the output voltage with a reference voltage and outputting a compensation signal to the compensation circuit when the output voltage is smaller than the reference voltage;
and the compensation circuit is used for compensating the output voltage of the voltage stabilizing circuit when receiving the compensation signal.
Optionally, the voltage compensation circuit further includes: a reference circuit;
the reference circuit is respectively connected with the voltage stabilizing circuit and the comparison circuit;
the reference circuit is used for receiving the input voltage of the voltage stabilizing circuit and stabilizing the input voltage to obtain a reference voltage;
the reference circuit is further configured to output the reference voltage to the comparison circuit.
Optionally, the reference circuit comprises: a first resistor and a TL431 voltage reference chip;
the first end of the first resistor is connected with the input end of the voltage stabilizing circuit, the second end of the first resistor is connected with the first end of the TL431 voltage reference chip, the second end of the TL431 voltage reference chip is connected with the first input end of the comparison circuit, and the third end of the TL431 voltage reference chip is grounded.
Optionally, the voltage compensation circuit further includes: a voltage regulation circuit;
the voltage regulating circuit is respectively connected with the voltage stabilizing circuit and the comparison circuit;
the voltage regulating circuit is used for regulating the output voltage of the voltage stabilizing circuit and outputting the regulated output voltage to the comparison circuit.
Optionally, the voltage regulating circuit comprises: a second resistor and a third resistor;
the first end of the second resistor is connected with the output end of the voltage stabilizing circuit, the second end of the second resistor is respectively connected with the first end of the third resistor and the second input end of the comparison circuit, and the second end of the third resistor is grounded.
Optionally, the comparison circuit comprises: a comparator:
the positive phase input end of the comparator is connected with the second end of the second resistor and the first end of the third resistor respectively, the negative phase input end of the comparator is connected with the second end of the TL431 voltage reference chip, and the output end of the comparator is connected with the control end of the compensation circuit.
Optionally, the compensation circuit comprises: the MOS tube and the fourth resistor;
the grid electrode of the MOS tube is connected with the output end of the comparator, the source electrode of the MOS tube is connected with the input end of the voltage stabilizing circuit, the drain electrode of the MOS tube is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the input end of the load circuit.
Optionally, the voltage compensation circuit further includes: a fifth resistor;
the first end of the fifth resistor is connected with the output end of the comparator and the grid electrode of the MOS tube respectively, and the second end of the fifth resistor is connected with the input end of the voltage stabilizing circuit and the source electrode of the MOS tube respectively.
Optionally, the voltage compensation circuit further includes: a sixth resistor;
the first end of the sixth resistor is connected with the output end of the comparator, and the second end of the sixth resistor is respectively connected with the first end of the fifth resistor and the grid electrode of the MOS tube.
In order to achieve the above object, the present invention further provides a voltage compensation device, which includes the above voltage compensation circuit.
The utility model discloses a voltage compensation circuit and device, this voltage compensation circuit includes: a comparison circuit and a compensation circuit; the comparison circuit is respectively connected with the voltage stabilizing circuit and the compensation circuit, and the compensation circuit is connected with the load circuit; the comparison circuit is used for receiving the output voltage of the voltage stabilizing circuit, comparing the output voltage with a reference voltage and outputting a compensation signal to the compensation circuit when the reference voltage is greater than the output voltage; and the compensation circuit is used for compensating the output voltage of the voltage stabilizing circuit when receiving the compensation signal. Because the utility model discloses when voltage stabilizing circuit's output voltage is less than reference voltage, compensate voltage stabilizing circuit's output voltage to avoided the load end chip to restart because the power down appears in the required current increase, and then improved the stability of circuit.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of a voltage compensation circuit according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of a voltage compensation circuit according to an embodiment of the present invention;
fig. 3 is a schematic circuit diagram of a second embodiment of a voltage compensation circuit according to the present invention.
The reference numbers illustrate:
the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that all directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
Furthermore, the descriptions in the present application related to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of technical features indicated are implicitly being indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, it should be considered that the combination of the technical solutions does not exist, and is not within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of a voltage compensation circuit according to an embodiment of the present invention. Based on fig. 1, the present invention provides a first embodiment of the voltage compensation circuit.
In this embodiment, the voltage compensation circuit includes: a comparison circuit 10 and a compensation circuit 20;
the comparison circuit 10 is connected to a voltage stabilizing circuit and a compensation circuit 20, respectively, and the compensation circuit 20 is connected to a load circuit.
It should be noted that the LDO is used in various circuits as a common power supply. However, some circuits have a characteristic that a current is small in a standby state, and the current is suddenly increased after wake-up, thereby causing a drop in an output voltage. Because the output current of the LDO power supply suddenly increases, the output current of an NPN power triode in the LDO needs to be adjusted in a transient state, the voltage adjustment is a feedback process, and the transient adjustment needs time, so that when the output current of the LDO and the capacitance of a load end cannot completely provide a large current with instantaneous change of the load, the voltage of the output end of the LDO can be reduced, and if the load comprises a chip, the voltage of the output end can be reduced to be lower than the normal working voltage of the chip of the load end sometimes, and the chip of the load end is restarted in a power failure mode.
Therefore, in order to overcome the above-mentioned drawbacks, in this embodiment, a voltage compensation circuit is additionally provided, and when the output voltage of the voltage regulator circuit is smaller than the reference voltage, the output voltage of the voltage regulator circuit is compensated by the voltage compensation circuit.
In a specific implementation, the comparison circuit 10 is configured to receive an output voltage of the voltage regulator circuit, compare the output voltage with a reference voltage, and output a compensation signal to the compensation circuit 20 when the output voltage is smaller than the reference voltage. Here, the reference voltage may be preset, for example, the reference voltage may be preset to 2.5V. And the compensation circuit 20 is used for compensating the output voltage of the voltage stabilizing circuit when receiving the compensation signal. The compensation circuit 20 is turned on when receiving the compensation signal, so as to compensate the output voltage of the regulator circuit by the input voltage V1 of the regulator circuit.
The embodiment discloses a voltage compensation circuit and a device, the voltage compensation circuit includes: a comparison circuit 10 and a compensation circuit 20; the comparison circuit 10 is respectively connected with the voltage stabilizing circuit and the compensation circuit 20, and the compensation circuit 20 is connected with the load circuit; the comparison circuit 10 is used for receiving the output voltage of the voltage stabilizing circuit, comparing the output voltage with a reference voltage, and outputting a compensation signal to the compensation circuit 20 when the reference voltage is greater than the output voltage; and the compensation circuit 20 is used for compensating the output voltage of the voltage stabilizing circuit when receiving the compensation signal. In the embodiment, when the output voltage of the voltage stabilizing circuit is smaller than the reference voltage, the output voltage of the voltage stabilizing circuit is compensated, so that the power failure restart of a load end chip due to the increase of required current is avoided, and the stability of the circuit is improved.
Referring to fig. 2 and 3, fig. 2 is a schematic structural diagram of a second embodiment of the voltage compensation circuit according to the embodiment of the present invention, and fig. 3 is a schematic circuit diagram of the second embodiment of the voltage compensation circuit according to the embodiment of the present invention. A second embodiment of the voltage compensation circuit is proposed based on the first embodiment of the voltage compensation circuit described above.
In this embodiment, the voltage compensation circuit further includes: a reference circuit 30;
the reference circuit 30 is connected to the voltage regulator circuit and the comparator circuit 10, respectively.
It should be understood that, in order to ensure that the reference voltage is kept stable, in the present embodiment, a reference circuit 30 may be additionally provided in the voltage compensation circuit, and the reference circuit 30 is used for keeping the reference voltage stable.
The reference circuit 30 is configured to receive an input voltage V1 of the voltage regulator circuit, and regulate the input voltage V1 to obtain a reference voltage; the reference circuit 30 is also used for outputting a reference voltage to the comparison circuit 10.
In the present embodiment, the reference circuit 30 includes: a first resistor R1 and a TL431 voltage reference chip D;
a first end of the first resistor R1 is connected to an input end of the voltage stabilizing circuit, a second end of the first resistor R1 is connected to a first end of the TL431 voltage reference chip D, a second end of the TL431 voltage reference chip D is connected to a first input end of the comparison circuit 10, and a third end of the TL431 voltage reference chip D is grounded to GND.
It is understood that, in order to ensure that the reference voltage is stabilized at 2.5V, the reference circuit 30 in the present embodiment includes: the first resistors R1 and TL431 voltage reference the chip D. Due to the characteristics of the TL431 voltage reference chip D, the TL431 voltage reference chip D is equivalent to a 2.5V voltage regulator tube when connected to the first resistor R1, and therefore, the reference circuit 30 is configured with the first resistor R1 and the TL431 voltage reference chip D to ensure that the reference voltage is stabilized at 2.5V.
In this embodiment, the voltage compensation circuit further includes: a voltage regulation circuit;
the voltage regulating circuit is respectively connected with the voltage stabilizing circuit and the comparison circuit 10;
the voltage regulating circuit is configured to regulate an output voltage V0 of the voltage stabilizing circuit, and output the regulated output voltage V0 to the comparing circuit 10.
It should be understood that, in order to avoid the comparator U receiving the output voltage V0 of the voltage stabilizing circuit being too large or too small, in the present embodiment, a voltage regulating circuit is further provided in the voltage compensation circuit for regulating the output voltage V0 of the voltage stabilizing circuit and outputting the regulated output voltage V0 to the comparison circuit 10.
In this embodiment, the voltage regulating circuit includes: a second resistor R2 and a third resistor R3;
a first end of the second resistor R2 is connected to an output end of the voltage stabilizing circuit, a second end of the second resistor R2 is connected to a first end of the third resistor R3 and a second input end of the comparison circuit 10, respectively, and a second end of the third resistor R3 is grounded to GND.
It can be understood that, in order to realize the adjustment of the output voltage V0 of the voltage stabilizing circuit through voltage division, the present embodiment sets the voltage adjusting circuit to be connected in a manner that the second resistor R2 and the third resistor R3 are connected in series for voltage division.
In the present embodiment, the comparison circuit 10 includes: a comparator U:
a positive phase input end of the comparator U is connected to the second end of the second resistor R2 and the first end of the third resistor R3, respectively, a negative phase input end of the comparator U is connected to the second end of the TL431 voltage reference chip D, and an output end of the comparator U is connected to the control end of the compensation circuit 20.
It should be understood that, in order to realize the comparison of the output voltage V0 with the reference voltage, in the present embodiment, the comparison circuit 10 is provided as the comparator U. The comparator U can be a high-speed comparator U, and outputs a low level when the voltage divided by the output voltage V0 of the voltage stabilizing circuit is less than the reference voltage; and when the voltage divided by the output voltage V0 of the voltage stabilizing circuit is less than the reference voltage, outputting a high level.
In the present embodiment, the compensation circuit 20 includes: the MOS tube Q and the fourth resistor R4;
the grid electrode of the MOS tube Q is connected with the output end of the comparator U, the source electrode of the MOS tube Q is connected with the input end of the voltage stabilizing circuit, the drain electrode of the MOS tube Q is connected with the first end of the fourth resistor R4, and the second end of the fourth resistor R4 is connected with the input end of the load circuit.
It will be appreciated that the output voltage V0 of the voltage regulator circuit is compensated for conduction when the comparator U outputs a low level. In this embodiment, the compensation circuit 20 may be provided with a MOS transistor Q. Wherein, MOS pipe Q is P type MOS pipe.
It should be understood that the MOS transistor Q is turned on when receiving a low level, and the output voltage V0 of the voltage stabilizing circuit is provided to the load circuit through the MOS transistor Q and the fourth resistor R4. The fourth resistor R4 may be a balanced current limiting resistor.
In this embodiment, the voltage compensation circuit further includes: a fifth resistor R5;
the first end of the fifth resistor R5 is connected with the output end of the comparator U and the grid electrode of the MOS tube Q respectively, and the second end of the fifth resistor R5 is connected with the input end of the voltage stabilizing circuit and the source electrode of the MOS tube Q respectively.
It is understood that, in order to provide the pin bias voltage for the MOS transistor Q, in the present embodiment, a fifth resistor R5 is further provided in the voltage compensation circuit.
In this embodiment, the voltage compensation circuit further includes: a sixth resistor R6;
a first end of the sixth resistor R6 is connected to the output end of the comparator U, and a second end of the sixth resistor R6 is connected to the first end of the fifth resistor R5 and the gate of the MOS transistor Q, respectively.
It should be understood that, in order to avoid the damage of the components due to the excessive current, in the present embodiment, a sixth resistor R6 is further provided in the voltage compensation circuit.
In a specific implementation, for ease of understanding, the description is made with reference to fig. 3, but this scheme is not limited thereto. Fig. 3 is the circuit schematic diagram of the voltage compensation circuit second embodiment that the embodiment of the utility model provides, in the figure, load circuit can be equivalent to equivalent load R7 and equivalent capacitor C1's parallelly connected, and when equivalent load R7 from underloading to the heavy load suddenly, LDO's transient response is slow, and when the electric current that equivalent capacitor C1 provided was not enough, can cause voltage stabilizing circuit's output voltage V0 to descend too big, resume normal voltage time extension. After the voltage compensation circuit is added, when the output voltage V0 of the voltage stabilizing circuit is reduced to the reference voltage, the comparator U outputs a low level to switch on the MOS tube Q, after the MOS tube Q is switched on, the internal resistance of the MOS tube Q is smaller (30 milliohm), so that the input voltage V1 of the voltage stabilizing circuit passes through the MOS tube Q and is directly added to the output end of the voltage stabilizing circuit after reaching a fourth resistor R4 (100 milliohm) with a small resistance value, because the output end has a capacitor, the voltage cannot be suddenly changed, and because the fourth resistor R4 is input with high voltage and large current, the capacitor at the output end is charged faster when the transient state is pulled down than the NPN tube in the LDO, thereby reducing the output time of the transient large current of the LDO, improving the transient response of the LDO, quickening the time for the voltage of the capacitor at the output end to be recovered to the normal voltage, and reducing the falling amplitude of the output voltage V0 of the voltage stabilizing circuit. When the output voltage V0 of the voltage stabilizing circuit is recovered to be higher than the preset voltage reference voltage, the MOS tube Q is cut off, the additional transient charging voltage compensation circuit is closed, and the normal LDO voltage regulation mode is switched.
According to the principle of the LDO, because of the transient adjustment time, the output voltage V0 drops during heavy load, which causes the input/output voltage difference of the LDO to become large, and under the condition that the maximum current output by the LDO is not changed, the input/output voltage difference of an NPN output tube inside the LDO becomes large, and the equivalent adjustment resistance also becomes large, that is, when the output voltage V0 decreases, the NPN equivalent resistance inside the LDO also increases, which further slows down the charging of the output voltage of the LDO to the load-side equivalent capacitor C1, and increases the time for the output voltage V0 at the output end of the LDO to return to the normal voltage.
In this embodiment, when the load suddenly changes from light load to heavy load and the output voltage V0 drops to the preset voltage through the voltage compensation circuit, the charging of the capacitor at the load end mainly comes from the voltage compensation circuit of this embodiment, the voltage compensation circuit uses the input voltage V1 higher than the voltage at the output end, and then the capacitor at the output end is charged through the small resistor (about 100 milliohms), and the theory of charging the capacitor can be known as follows: the time for charging the capacitor with equal capacitance capacity and equal initial voltage to the preset voltage is mainly related to the charging voltage and the charging resistor, because the charging resistor with high voltage and small resistance value is used in the voltage compensation circuit of the embodiment, and the equivalent capacitor C1 at the load end is charged when the load is instantaneously adjusted from light load to heavy load, the charging of the equivalent capacitor C1 at the load end is mainly completed by an additional circuit when the load is instantaneously adjusted, so that the transient output current at the output end of the LDO is reduced
In this embodiment, a voltage compensation circuit is provided, which further includes: a reference circuit 30; wherein, the reference circuit 30 is respectively connected with the voltage stabilizing circuit and the comparison circuit 10; the reference circuit 30 is configured to receive an input voltage V1 of the voltage stabilizing circuit, and stabilize the input voltage V1 to obtain a reference voltage; a reference circuit 30 for outputting a reference voltage to the comparison circuit 10; since the present embodiment additionally provides the reference circuit 30 between the voltage stabilizing circuit and the comparison circuit 10 for voltage stabilization to obtain the reference voltage, it is possible to ensure that the reference voltage remains stable.
In order to achieve the above object, the present invention further provides a voltage compensation device, which includes the voltage compensation circuit as described above. The specific structure of the voltage compensation circuit refers to the above embodiments, and since the voltage compensation device adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
The above is only the preferred embodiment of the present invention, and not the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings or the direct or indirect application in other related technical fields are included in the patent protection scope of the present invention.
Claims (10)
1. A voltage compensation circuit, comprising: a comparison circuit and a compensation circuit;
the comparison circuit is respectively connected with the voltage stabilizing circuit and the compensation circuit, and the compensation circuit is connected with the load circuit;
the comparison circuit is used for receiving the output voltage of the voltage stabilizing circuit, comparing the output voltage with a reference voltage and outputting a compensation signal to the compensation circuit when the output voltage is smaller than the reference voltage;
and the compensation circuit is used for compensating the output voltage of the voltage stabilizing circuit when receiving the compensation signal.
2. The voltage compensation circuit of claim 1, wherein the voltage compensation circuit further comprises: a reference circuit;
the reference circuit is respectively connected with the voltage stabilizing circuit and the comparison circuit;
the reference circuit is used for receiving the input voltage of the voltage stabilizing circuit and stabilizing the input voltage to obtain a reference voltage;
the reference circuit is further configured to output the reference voltage to the comparison circuit.
3. The voltage compensation circuit of claim 2, wherein the reference circuit comprises: a first resistor and a TL431 voltage reference chip;
the first end of the first resistor is connected with the input end of the voltage stabilizing circuit, the second end of the first resistor is connected with the first end of the TL431 voltage reference chip, the second end of the TL431 voltage reference chip is connected with the first input end of the comparison circuit, and the third end of the TL431 voltage reference chip is grounded.
4. The voltage compensation circuit of claim 3, wherein the voltage compensation circuit further comprises: a voltage regulation circuit;
the voltage regulating circuit is respectively connected with the voltage stabilizing circuit and the comparison circuit;
the voltage regulating circuit is used for regulating the output voltage of the voltage stabilizing circuit and outputting the regulated output voltage to the comparison circuit.
5. The voltage compensation circuit of claim 4, wherein the voltage regulation circuit comprises: a second resistor and a third resistor;
the first end of the second resistor is connected with the output end of the voltage stabilizing circuit, the second end of the second resistor is respectively connected with the first end of the third resistor and the second input end of the comparison circuit, and the second end of the third resistor is grounded.
6. The voltage compensation circuit of claim 5, wherein the comparison circuit comprises: a comparator:
the positive phase input end of the comparator is connected with the second end of the second resistor and the first end of the third resistor respectively, the negative phase input end of the comparator is connected with the second end of the TL431 voltage reference chip, and the output end of the comparator is connected with the control end of the compensation circuit.
7. The voltage compensation circuit of claim 6, wherein the compensation circuit comprises: the MOS tube and the fourth resistor;
the grid electrode of the MOS tube is connected with the output end of the comparator, the source electrode of the MOS tube is connected with the input end of the voltage stabilizing circuit, the drain electrode of the MOS tube is connected with the first end of the fourth resistor, and the second end of the fourth resistor is connected with the input end of the load circuit.
8. The voltage compensation circuit of claim 7, wherein the voltage compensation circuit further comprises: a fifth resistor;
the first end of the fifth resistor is connected with the output end of the comparator and the grid electrode of the MOS tube respectively, and the second end of the fifth resistor is connected with the input end of the voltage stabilizing circuit and the source electrode of the MOS tube respectively.
9. The voltage compensation circuit of claim 8, wherein the voltage compensation circuit further comprises: a sixth resistor;
the first end of the sixth resistor is connected with the output end of the comparator, and the second end of the sixth resistor is respectively connected with the first end of the fifth resistor and the grid electrode of the MOS tube.
10. A voltage compensation arrangement, characterized in that the voltage compensation arrangement comprises a voltage compensation circuit according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220274536.2U CN217718523U (en) | 2022-02-09 | 2022-02-09 | Voltage compensation circuit and device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202220274536.2U CN217718523U (en) | 2022-02-09 | 2022-02-09 | Voltage compensation circuit and device |
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| CN217718523U true CN217718523U (en) | 2022-11-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117277541A (en) * | 2023-11-20 | 2023-12-22 | 深圳市创诺新电子科技有限公司 | Airborne emergency power supply system and airborne emergency power supply |
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2022
- 2022-02-09 CN CN202220274536.2U patent/CN217718523U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117277541A (en) * | 2023-11-20 | 2023-12-22 | 深圳市创诺新电子科技有限公司 | Airborne emergency power supply system and airborne emergency power supply |
| CN117277541B (en) * | 2023-11-20 | 2024-04-05 | 深圳市创诺新电子科技有限公司 | Airborne emergency power supply system and airborne emergency power supply |
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