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High-gain three-stage operation amplifier based on single-channel stability compensation feedback

A technology of stability compensation and operational amplifiers, which is applied to DC-coupled DC amplifiers, amplifiers, differential amplifiers, etc., can solve the problems of large current loss and achieve the effect of reducing current loss and power consumption

Pending Publication Date: 2018-11-16
CHONGQING PAIXINRUWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For this reason, the main purpose of the present invention is to provide a high-gain three-stage operational amplifier based on single-way stability compensation feedback, aiming to solve the problem that the current consumption of the output stage in the three-stage operational amplifier structure is relatively large

Method used

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  • High-gain three-stage operation amplifier based on single-channel stability compensation feedback
  • High-gain three-stage operation amplifier based on single-channel stability compensation feedback
  • High-gain three-stage operation amplifier based on single-channel stability compensation feedback

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Embodiment 1

[0033] Embodiments of the present invention provide a high-gain three-stage operational amplifier based on single-path stability compensation feedback, such as Figure 5 As shown, the high-gain three-stage operational amplifier based on single-channel stability compensation feedback consists of a transistor M i1 , M i2 , M i3 , M i4 , M i5 The first differential amplifier composed of transistor M i6 , M i7 , M i8 , M i9 , M i10 The first differential amplifier composed of transistor M i11 , M i2 Composed of a single-stage amplifier, and a single-path stability compensation composed of a zeroing resistor Rz and a compensation capacitor Cm.

[0034] figure 1 Among them, Mi2 and Mi3 are the input pair tubes of the first differential amplifier, Mi1 is the load of the first differential amplifier, Mi4 and Mi5 constitute the current source of the first differential amplifier; Mi7 and Mi8 are the input pair tubes of the second differential amplifier, and Mi9 Mi10 is the l...

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Abstract

The invention discloses a high-gain three-stage operation amplifier based on single-channel stability compensation feedback. The high-gain three-stage operation amplifier comprises a first differential amplifier, a second differential amplifier and a single-stage amplifier. The first differential amplifier, the second differential amplifier and the single-stage amplifier are sequentially connected. A zero resistor and a compensation capacitor are bridged between an output of the first differential amplifier and an output of the second differential amplifier. The high-gain three-stage operationamplifier performs stability compensation through a single path, only retains the compensation capacitor between the output of the first differential amplifier and the output of the second differential amplifier compared with nested miller compensation, reduces circuit complexity and makes three-stage amplification more stable.

Description

technical field [0001] The invention belongs to the field of integrated circuit design, in particular to a high-gain three-stage operational amplifier based on single-path stability compensation feedback. Background technique [0002] The output signal and input signal of the fully differential operational amplifier are differential signals. Since it shows good advantages in terms of noise, voltage swing, bandwidth frequency and unity gain, the fully differential form is often used as a high-performance synonymous with. Traditional differential amplifiers commonly include single-stage and two-stage differential amplifiers, and single-stage fully differential op amps can also be divided into three structures: simple full differential, sleeve-type cascode-cascode and folded cascode-cascode . [0003] (1) if figure 1 A simple single-stage differential amplifier is shown, Vdd represents the supply voltage, M1 and M2 form the input differential pair, and M3 and M4 form the loa...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F3/45H03F3/68H03F1/02
CPCH03F3/45475H03F1/0205H03F3/68
Inventor 唐枋
Owner CHONGQING PAIXINRUWEI TECH CO LTD