CN-121979353-A - High-frequency output circuit compensation circuit, compensation method and power supply

Abstract

The application discloses a high-frequency output circuit compensation circuit, a compensation method and a power supply, wherein input voltage and output current signals are acquired in real time through a double ADC circuit, a control unit accurately calculates the difference value between real-time standard output current and actual output current, the compensation voltage signals are dynamically generated by combining the compensation circuit, and a selection unit is matched to switch signal paths as required, so that accurate compensation under a high-frequency scene is realized. The problem of precision out of tolerance caused by device frequency response in the high frequency of the existing pure hardware circuit is effectively solved, and high-frequency output precision stability is remarkably improved. The compensation adjustment is automatically completed through closed-loop control without complex hardware change, the operation is simple and convenient, the compensation adjustment is suitable for various circuit scenes needing linear precision correction, the application range is wide, and the precision advantage of original hardware calibration in a low-frequency scene is considered.

Inventors

• ZHANG YU
• WU HONG

Assignees

• 恩智技术股份有限公司

Dates

Publication Date

20260505

Application Date

20260129

Claims (10)

1. 1. A high frequency output circuit compensation circuit, comprising: the selection unit is used for enabling the first selection input end to be connected with the selection output end or enabling the second selection input end to be connected with the selection controlled end according to the selection signal input by the selection controlled end; the control unit is connected with the selection controlled end; The first ADC circuit is connected between the first selection input end and the control unit and is used for obtaining an input voltage digital signal corresponding to the external voltage signal; The control unit is used for determining a real-time standard output current signal according to the input voltage digital signal, obtaining a compensation adjustment signal according to a real-time current difference value between the real-time standard output current signal and the output current digital signal, and adjusting the selection signal according to the real-time current difference value; And the compensation circuit is connected between the control unit and the second selection input end, and is used for generating a compensation voltage signal according to the compensation adjustment signal and outputting the compensation voltage signal to the second selection input end.
2. 2. The high-frequency output circuit compensation circuit according to claim 1, wherein the compensation circuit comprises: the input end of the DAC module is used for inputting the compensation adjustment signal; The positive input end of the first operational amplifier unit is connected with the output end of the DAC module, the negative input end of the first operational amplifier unit is connected with a preset adjusting voltage through a first resistor, and the output end of the first operational amplifier unit is connected with the negative input end through a second resistor; And the first input end of the multiplier is connected with the output end of the first operational amplifier unit, the second input end of the multiplier is connected with the first selection input end, and the output end of the multiplier is connected with the second selection input end.
3. 3. The high-frequency output circuit compensation circuit according to claim 2, characterized in that the compensation circuit further comprises: and the positive input end of the second operational amplifier unit is connected with the first selection input end, the negative input end of the second operational amplifier unit is connected with the output end, and the output end of the second operational amplifier unit is connected with the second input end of the multiplier.
4. 4. A high frequency output circuit compensation circuit according to claim 2 or 3, characterized in that the compensation circuit further comprises: And the positive input end of the third operational amplifier unit is connected with the output end of the multiplier, the negative input end of the third operational amplifier unit is connected with the output end, and the output end of the third operational amplifier unit is connected with the second selection input end.
5. 5. The high-frequency output circuit compensation circuit according to claim 1, further comprising: and the driver is connected between the control unit and the selected controlled end.
6. 6. The high frequency output circuit compensation circuit of claim 4 wherein said first ADC circuit comprises: the positive input end of the fourth operational amplifier unit is connected with the first selection input end, the negative input end of the fourth operational amplifier unit is connected with the ground wire through a third resistor, and the output end of the fourth operational amplifier unit is connected with the negative input end through a fourth resistor; and the input end of the first ADC module is connected with the output end of the fourth operational amplifier unit, and the output end of the first ADC module is used for outputting the input voltage digital signal.
7. 7. The high frequency output circuit compensation circuit of claim 1 wherein said second ADC circuit comprises: the positive input end of the fifth operational amplifier unit is connected with the current sampling output end, the negative input end of the fifth operational amplifier unit is connected with the ground wire through a fifth resistor, and the output end of the fifth operational amplifier unit is connected with the negative input end through a sixth resistor; and the input end of the second ADC module is connected with the output end of the fifth operational amplifier unit, and the output end of the second ADC module is used for outputting the output current digital signal.
8. 8. A power supply comprising the high-frequency output circuit compensation circuit according to any one of claims 1 to 7.
9. 9. A high-frequency output circuit compensation method, characterized by being applied to the control unit of the high-frequency output circuit compensation circuit according to any one of claims 1 to 7; The high-frequency output circuit compensation method comprises the following steps: acquiring an input voltage digital signal corresponding to an external voltage signal; determining real-time frequency data of the input voltage digital signal; executing a compensation strategy under the condition that the real-time frequency data is higher than a preset compensation frequency threshold value; Wherein the compensation strategy comprises: Determining a real-time standard output current signal corresponding to the input voltage digital signal; acquiring an output current digital signal corresponding to the signal output by the current sampling output end; determining a real-time current difference value between the output current digital signal and the real-time standard output current signal; and under the condition that the real-time current difference exceeds a preset deviation allowable range, determining a compensation adjustment signal according to the real-time current difference, outputting the compensation adjustment signal to the compensation circuit, and sending a selection signal to a selection controlled end so that a second selection input end is connected with the selection output end.
10. 10. The high-frequency output circuit compensation method according to claim 9, further comprising: and stopping executing the compensation strategy under the condition that the real-time frequency data is smaller than or equal to a preset compensation frequency threshold value.

Description

High-frequency output circuit compensation circuit, compensation method and power supply Technical Field The present application relates to the field of power supplies, and in particular, to a compensation circuit and a compensation method for a high frequency output circuit, and a power supply. Background In the technical field of analog circuits, in a standard current source remote programming scene, an output circuit of a pure hardware architecture can meet the precision requirement of a direct current or low frequency input signal after hardware calibration. However, when the input voltage frequency is increased, the natural frequency response of each stage of devices of the circuit can change the loop high-frequency gain, so that the deviation between the output current and an ideal value exceeds the standard, and the high-frequency scene precision requirement is difficult to adapt. Disclosure of Invention The application aims to provide a high-frequency output circuit compensation circuit, a compensation method and a power supply, which can realize stable output in a high-frequency scene. A high-frequency output circuit compensation circuit according to an embodiment of the first aspect of the present application includes: the selection unit is used for enabling the first selection input end to be connected with the selection output end or enabling the second selection input end to be connected with the selection controlled end according to the selection signal input by the selection controlled end; the control unit is connected with the selection controlled end; The first ADC circuit is connected between the first selection input end and the control unit and is used for obtaining an input voltage digital signal corresponding to the external voltage signal; The control unit is used for determining a real-time standard output current signal according to the input voltage digital signal, obtaining a compensation adjustment signal according to a real-time current difference value between the real-time standard output current signal and the output current digital signal, and adjusting the selection signal according to the real-time current difference value; And the compensation circuit is connected between the control unit and the second selection input end, and is used for generating a compensation voltage signal according to the compensation adjustment signal and outputting the compensation voltage signal to the second selection input end. A power supply according to an embodiment of the second aspect of the present application includes a high frequency output circuit compensation circuit as described in the embodiment of the first aspect. The high-frequency output circuit compensation method according to the embodiment of the third aspect of the present application is applied to the control unit of the high-frequency output circuit compensation circuit as the embodiment of the first aspect; The high-frequency output circuit compensation method comprises the following steps: acquiring an input voltage digital signal corresponding to an external voltage signal; determining real-time frequency data of the input voltage digital signal; executing a compensation strategy under the condition that the real-time frequency data is higher than a preset compensation frequency threshold value; Wherein the compensation strategy comprises: Determining a real-time standard output current signal corresponding to the input voltage digital signal; acquiring an output current digital signal corresponding to the signal output by the current sampling output end; determining a real-time current difference value between the output current digital signal and the real-time standard output current signal; and under the condition that the real-time current difference exceeds a preset deviation allowable range, determining a compensation adjustment signal according to the real-time current difference, outputting the compensation adjustment signal to the compensation circuit, and sending a selection signal to a selection controlled end so that a second selection input end is connected with the selection output end. According to the high-frequency output circuit compensation circuit, the compensation method and the power supply, the input voltage and the output current signals are collected in real time through the double ADC circuit, the control unit accurately calculates the difference value between the real-time standard output current and the actual output current, the compensation voltage signals are dynamically generated by combining the compensation circuit, and the selection unit is matched with switching of the signal paths as required, so that accurate compensation in a high-frequency scene is realized. The problem of precision out of tolerance caused by device frequency response in the high frequency of the existing pure hardware circuit is effectively solved, and high-frequency output precision stability is remarkably im