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Gain bootstrap type C class reverser and application circuit thereof

A technology of inverters and resistors, which is applied in the parts, electrical components, and generating electric pulses of electric pulse circuits. It can solve the problems of low gain, loss of function, and degradation of application circuit performance, so as to reduce circuit complexity and Effects of power consumption, increased circuit gain, and reduced chip footprint

Inactive Publication Date: 2012-05-09
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is to provide a gain bootstrap type C class inverter to overcome the low self-gain of the class C inverter in the prior art, which is difficult to be used in occasions requiring higher gain, and The steady-state characteristics (gain, bandwidth, and static power consumption, etc.) and dynamic characteristics (slew rate, settling time, and dynamic power consumption, etc.) of the prior art Class C inverter are greatly affected by the process deviation, resulting in the performance of its application circuit Insufficiency of decline or even loss of function

Method used

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  • Gain bootstrap type C class reverser and application circuit thereof
  • Gain bootstrap type C class reverser and application circuit thereof
  • Gain bootstrap type C class reverser and application circuit thereof

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Experimental program
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Effect test

Embodiment 1

[0047] Embodiment 1: The circuit structure diagram of the gain bootstrap type C class inverter proposed by the present invention is as attached image 3 As shown, in addition to the class C inverter 32 , it also includes a first gain bootstrap module 30 , a second gain bootstrap module 31 , a PMOS body potential modulation module 33 and an NMOS body potential modulation module 34 .

[0048] The class C inverter 32 is composed of a first PMOS transistor M1 , a second PMOS transistor M3 , a first NMOS transistor M2 and a second NMOS transistor M4 . The power supply voltage V of class C inverter 32 DD Slightly lower than the sum of the threshold voltage of the first PMOS transistor M1 and the first NMOS transistor M2, it can realize two different working states of high gain, low power consumption and high slew rate and high current according to the difference in the bias voltage of the input terminal. Detailed description as follows:

[0049] Assuming that the threshold voltag...

Embodiment 2

[0070] Embodiment 2: The pseudo-differential structure switched capacitor integrator proposed by the present invention is as attached Figure 4 As shown, it includes two gain bootstrap type C-type inverters 40 and a common-mode feedback circuit 41 of the prior art, a sampling capacitor C S , compensation capacitor C C , Integrating capacitance C I and switch. Among them, two gain-bootstrap class C inverters 40 are respectively located in the positive and negative branches of the integrator, and the two inverters are differentially symmetrical to form a pseudo-differential structure, while two common-mode feedback circuits 41 are respectively located in the integrator The positive and negative legs form a common-mode feedback.

[0071] In actual work, the switched capacitor integrator is divided into sampling phase and integrating phase, which are controlled by two non-overlapping clocks of p1 and p2, as shown in the attached Figure 5 As shown, the integral phase can be fu...

Embodiment 3

[0080] Embodiment 3: The 2-1 cascaded Sigma-Delta analog-to-digital converter proposed by the present invention includes a pseudo-differential switched capacitor integrator based on a gain-bootstrap class-C inverter. In order to illustrate the specific structure and working mode of the 2-1 cascaded Sigma-Delta analog-to-digital converter, let's start with the general structure and working mode of the Sigma-Delta analog-to-digital converter:

[0081] The structural block diagram of the Sigma-Delta analog-to-digital converter is attached Image 6 As shown, it includes an anti-aliasing filter 60 , a sample-and-hold 61 , an analog modulator 62 and a digital decimation filter 63 . The analog modulator 62 is used for noise shaping in the analog-to-digital conversion process, and it includes loop filter 65, feedforward ADC (analog-to-digital converter) 66, feedback DAC (digital-to-analog converter) 67, adder 64 and other parts, The feed-forward ADC66 and the feedback DAC67 are colle...

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Abstract

The invention discloses a gain bootstrap type C class reverser and an application circuit thereof. Based on a C class reverser 32 in the prior art, the gain bootstrap type C class reverser is additionally provided with micropower gain bootstrap modules 30 and 31 and bulk potential modulation modules 33 and 34, wherein the gain bootstrap modules 30 and 31 greatly improve the steady-state gain of the C class reverser under the condition of not losing the output swing or increasing the circuit power consumption significantly so as to improve the integral precision of a gain bootstrap type C class reverser-based pseudo-differential structure switched capacitor integrator and the analog-to-digital conversion precision of an analog-to-digital converter, and broaden the application range of the C class reverser; and the bulk potential modulation modules 33 and 34 make the steady-state characteristics (gain, bandwidth, static power consumption and the like) and the dynamic characteristics (slew rate, setting time, dynamic power consumption and the like) of the whole reverser consistent under the condition of different corners, and greatly improve the stability and the robustness of the application circuit of the gain bootstrap type C class reverser under the condition of not increasing the power consumption significantly.

Description

technical field [0001] The invention relates to a class-C inverter and an application circuit thereof, belonging to the technical field of integrated circuits. Background technique [0002] In traditional analog circuit design, the operational amplifier is the main functional module, and it is widely used in sample-and-hold, algebraic operations, common-mode feedback, and buffer circuits. At the same time, the operational amplifier is also the main power consumption module in the analog circuit. At present, low voltage and low power consumption are the mainstream trend in the development of analog circuit design, but for operational amplifiers, the reduction of power supply voltage means the reduction of dynamic range, the reduction of input common mode range, the increase of capacitance and the inability to turn on or off the floating circuit. Switches, etc., we need to use more sophisticated circuit design to overcome these difficulties. Therefore, how to implement an op...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K3/01H03K3/356
Inventor 罗豪韩雁黄小伟蔡坤明张昊韩晓霞
Owner ZHEJIANG UNIV
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