Gain bootstrap operational amplifier

A technology of operational amplifiers and amplifiers, which is applied in the direction of differential amplifiers, improved amplifiers to expand bandwidth, and DC-coupled DC amplifiers. It can solve problems such as unreachable and insufficient gain, and achieve the effects of performance improvement, large input resistance, and large bandwidth.

Active Publication Date: 2008-06-25
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
View PDF0 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In practical applications, although such an operational amplifier increases the gain of the operational amplifier by using an auxiliary amplifier to increase the output impedance, while maintaining the good frequency characteristics of the single-stage operational amplifier and having a large bandwidth, its gain is still not high enough to be Meet the requirements of some occasions

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Gain bootstrap operational amplifier
  • Gain bootstrap operational amplifier
  • Gain bootstrap operational amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] The structure of the gain bootstrap operational amplifier of the present invention can also refer to figure 1 As shown, it includes a differential circuit and a cascode bootstrap circuit. The cascode bootstrap circuit includes an auxiliary operational amplifier Ap and an auxiliary operational amplifier An. Unlike the existing gain bootstrap operational amplifier, in In the present invention, the auxiliary operational amplifier Ap is a gain bootstrap operational amplifier with a differential circuit composed of N-channel junction field effect transistors, and the auxiliary operational amplifier An is a differential circuit composed of P-channel junction field effect transistors. gain bootstrap op amp.

[0028] The auxiliary gain bootstrap operational amplifier Ap described in the present invention is as Figure 5 As shown, it consists of a differential circuit and a cascode bootstrap circuit. The differential circuit includes N-channel junction field effect transistors ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a gain bootstrap operational amplifier, which includes a differential circuit and a common-source common-grid bootstrap circuit. The common-source common-grid bootstrap circuit includes an assistant operational amplifier Ap and an assistant operational amplifier An. The assistant operational amplifier Ap is of an gain bootstrap operational amplifier of which the differential circuit consists of a N channel junction field effect transistor, an assistant operational amplifier An is of a gain bootstrap operational amplifier of which the differential circuit consists of a P channel junction field effect transistor. The invention obtains the gain bootstrap operational amplifier with high gain by adopting the structure nesting a plurality of grades of gain bootstrap operational amplifiers, has larger bandwidth and larger input resistance, and greatly improves the performance of the gain bootstrap operational amplifier.

Description

technical field [0001] The invention relates to an analog circuit, in particular to a gain bootstrap operational amplifier. Background technique [0002] High-gain transconductance operational amplifiers are widely used in CMOS analog integrated circuits. In order to obtain high gain, the commonly used structure is a two-stage operational amplifier and an operational amplifier using gain bootstrap technology. Because the frequency compensation technology is inevitably used in the two-stage operational amplifier, the bandwidth of the operational amplifier with this structure is relatively small. An operational amplifier using gain bootstrap technology, including a differential circuit and a cascode bootstrap circuit, wherein the differential circuit is divided into two structures using an N-channel junction field effect transistor and a P-channel junction field effect transistor. The differential circuit adopts the gain bootstrap operational amplifier structure of N-channel...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F1/42H03F3/45
Inventor 陈美娜朱红卫
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap