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Dynamic zero-pole tracing compensating circuit

A compensation circuit and zero-pole technology, applied in the field of compensation circuits, can solve the problems of high cost, complex structure, and many circuit components, and achieve the effects of simple structure, high robustness, and strong portability

Pending Publication Date: 2019-03-12
58TH RES INST OF CETC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a dynamic zero-pole tracking compensation circuit to solve the problem of many existing circuit components, complex structure and high cost

Method used

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  • Dynamic zero-pole tracing compensating circuit

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Embodiment 1

[0027] The invention provides a dynamic zero-pole tracking compensation circuit, which is used in a high-power LDO to provide compensation for the LDO loop and improve loop stability. The structure of the dynamic pole-zero tracking compensation circuit is as follows image 3 shown, including the main power tube M POW2 and from the power tube M POW1 , the main power tube M POW2 of the gate and the slave power transistor M POW1 gate interconnection, the slave power transistor M POW1 through resistor R s1 connected with the power supply VDD, the main power transistor M POW2 Connect directly to voltage VDD.

[0028] Specifically, the dynamic zero-pole tracking compensation circuit also includes a resistor R P-ESR , R L , R F1 , R F2 and capacitance C F 、C L , where the main power tube M POW2 The drain terminal passes through the resistor R F1 and resistor R F2 ground; the slave power tube M POW1 The drain terminal passes through the capacitor C F Connected to the ...

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Abstract

The invention discloses a dynamic zero-pole tracing compensating circuit, and belongs to the technical field of compensating circuits. The dynamic zero-pole tracing compensating circuit comprises a main power tube MPOW2 and an auxiliary power tube MPOW1, a grid electrode of the main power tube MPOW2 is connected with a grid electrode of the auxiliary power tube MPOW1, the auxiliary power tube MPOW1 is connected with a power source VDD through a resistor Rs1, and the main power tube MPOW2 is directly connected with a voltage VDD. The structure is simple, a dynamic compensation technology can berealized with only one source electrode feedback resistor RS1, the cost for the circuit according to the area is lowered greatly, and costs are lowered; only one auxiliary power tube access is arranged in the circuit, in this way, shunting for the main power tube is reduced greatly, the capacity of voltage regulation of a whole LDO cannot be affected, and the integral performance index of the LDOis promoted; an operational amplifier does not need to be used, so that the complexity of the circuit is low, and the circuit is easy to obtain. In this way, the dynamic zero-pole tracing compensating circuit is high in transportability, adaptability and robustness.

Description

technical field [0001] The invention relates to the technical field of compensation circuits, in particular to a dynamic zero-pole tracking compensation circuit. Background technique [0002] In high-performance and high-power electronic systems, a large number of linear regulators are usually used to supply power to the entire system. Among the many indicators of LDO (low dropout regulator, that is, low dropout linear regulator), loop stability is the most basic and most important parameter. An LDO circuit with an unstable loop will oscillate during operation, which directly affects its normal operation; at the same time, the load transient response capability of the LDO is also closely related to its stability. [0003] The traditional LDO loop compensation technology uses fixed compensation, but it can only be applied to low-power LDOs with small load changes. Because the load current of a high-power LDO circuit can reach above the ampere level, the frequency of the out...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05F1/56
CPCG05F1/561
Inventor 邱旻韡李娟陈红罗永波宣志斌肖培磊
Owner 58TH RES INST OF CETC
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