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Resistance adjusting circuit for improving circuit stability

A resistance adjustment and stability technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve problems such as poor stability of circuit output characteristics, and achieve the effect of improving circuit stability and solving its own poor stability.

Active Publication Date: 2021-06-29
苏州领慧立芯科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to solve the problem of poor self-stability of the existing circuit due to the large influence of the output characteristic on the load change

Method used

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  • Resistance adjusting circuit for improving circuit stability
  • Resistance adjusting circuit for improving circuit stability
  • Resistance adjusting circuit for improving circuit stability

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0054] Example: image 3 A functional block diagram of a resistance adjustment circuit for improving circuit stability according to an embodiment of the present invention is shown. refer to image 3 , the resistance adjustment circuit used to improve circuit stability in this embodiment includes:

[0055] The current sampling unit is used to collect the output current of the circuit whose stability is to be improved;

[0056] A resistance adjustment unit, configured to adjust the total resistance of the branch where the predetermined target resistance is located according to the collected output current of the circuit whose stability is to be improved, and the adjustment is used to prevent the current on the target resistance from changing The above output current change;

[0057] The target resistance is a resistance in the circuit whose stability is to be improved, which affects the stability of the circuit due to its own current changing with the output current.

[0058...

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Abstract

The invention discloses a resistance adjusting circuit for improving circuit stability. According to the resistance adjusting circuit for improving the stability of the circuit, the current sampling unit is used for collecting the output current of the circuit with the stability to be improved, and the resistance adjusting unit is used for adjusting the total resistance of the branch where the preset target resistance is located according to the collected output current of the circuit with the stability to be improved. The current on the target resistor is prevented from changing along with the output current. The target resistor is a resistor in the circuit of which the stability is to be improved, and the stability of the circuit is influenced because the current of the target resistor changes along with the output current. The resistance adjusting circuit for improving the stability of the circuit can effectively solve the problem that the stability of an existing circuit is poor due to the fact that the output characteristic of the existing circuit is greatly influenced by load changes.

Description

technical field [0001] The invention belongs to the technical field of stability compensation circuits, and more particularly relates to a resistance adjustment circuit for improving circuit stability. Background technique [0002] In some existing circuits, the output characteristics are greatly affected by load changes, and problems such as larger output voltage deviation or increased broadband noise are prone to occur. [0003] For example figure 1 The shown three-stage amplifier based on CMOS, the output stage of the amplifier is provided with a bypass capacitor CL (>10nF), and its main pole is at the output stage. The middle stage of the amplifier is transimpedance amplification. The resistor R1 with a fixed resistance can effectively reduce the impedance of the NA node and the NB node, so that the poles of the NA node and the NB node are outside the unity gain bandwidth product (GBW), thereby making the amplifier stable. Work. However, this amplifier suffers from th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F3/26
CPCG05F3/26
Inventor 卢立柱
Owner 苏州领慧立芯科技有限公司
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