Unlock instant, AI-driven research and patent intelligence for your innovation.

Low-voltage rail-to-rail input and output operational amplifier

An operational amplifier, input and output technology, used in amplifiers, differential amplifiers, DC-coupled DC amplifiers, etc., can solve problems such as difficult work, low bandwidth, and complex structure, and achieve high power supply rejection ratio, high bandwidth, and low noise. Effect

Active Publication Date: 2020-09-22
XIANGTAN UNIV
View PDF3 Cites 1 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Traditional rail-to-rail input / output operational amplifiers use a pair of NMOS transistors and a pair of PMOS transistors to connect to a high-impedance Cacode structure and a floating gate structure to control rail-to-rail output, resulting in a complex structure and low bandwidth. The point is that it is very difficult to work at low pressure

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
  • Low-voltage rail-to-rail input and output operational amplifier
  • Low-voltage rail-to-rail input and output operational amplifier
  • Low-voltage rail-to-rail input and output operational amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0016] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0017] Such as figure 1 As shown, a low-voltage rail-to-rail input and output operational amplifier includes a rail-to-rail low-impedance input stage circuit, a low-impedance diode common-source circuit, a two-stage amplifying stage circuit, and a transimpedance amplifier. The input signal and the rail-to-rail low impedance The input end of the input stage circuit is connected, the output end of the rail-to-rail low impedance input stage circuit is connected with the input end of the low impedance diode common source circuit, the output end of the low impedance diode common source circuit is connected with the input of the two-stage amplifier circuit The output terminals of the two-stage amplifier circuit are connected with the input terminals of the transimpedance amplifier, and the output terminals of the transimpedance amplifier output signals.

[0...

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 low-voltage rail-to-rail input and output operational amplifier. The operational amplifier comprises a rail-to-rail low-impedance input stage circuit, a low-impedance diode common source circuit, a two-stage amplification stage circuit and a transimpedance amplifier which are sequentially connected in series. According to the invention, two half Cascodes are used as a rail-to-rail input stage, a low-impedance Diode common source stage and a trans-impedance amplifier; the whole circuit can easily work under 1.8 V voltage through the perfect combination; each position in the circuit is enabled to be located at a low impedance node, and a dominant pole is enabled to be located at an output stage so that frequency compensation is enabled to be quite simple, and in thesame gain amplifier, the amplifier has the outstanding advantages of being high in bandwidth, high in power supply rejection ratio, low in noise and the like.

Description

technical field [0001] The invention relates to a low voltage rail-to-rail input and output operational amplifier. Background technique [0002] Rail-to-rail input / output operational amplifier circuits are widely used in integrated circuits, and stability, gain, and bandwidth are one of the important indicators of operational amplifiers. Traditional rail-to-rail input / output operational amplifiers use a pair of NMOS transistors and a pair of PMOS transistors to connect to a high-impedance Cacode structure and a floating gate structure to control rail-to-rail output, resulting in a complex structure and low bandwidth. The point is that working at low pressure is very difficult. Contents of the invention [0003] In order to solve the above technical problems, the present invention provides a low-voltage rail-to-rail input-output operational amplifier with simple structure, safety and reliability. [0004] The technical solution of the present invention to solve the above-...

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): H03F3/45
CPCH03F3/45179
Inventor 唐明华兰燕周焱谭彩虹李刚肖永光李正
Owner XIANGTAN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com