High-speed low-power consumption large-swing operational amplifier for analog-digital converter of production line

A technology for analog-to-digital converters and operational amplifiers, which can be used in analog-to-digital converters, DC-coupled DC amplifiers, differential amplifiers, etc., and can solve problems such as high power consumption of operational amplifiers

Active Publication Date: 2010-11-24
FUDAN UNIV
View PDF4 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the present invention is to provide a kind of low power consumption large-swing operational amplifier for pipeline analog-to-...

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
  • High-speed low-power consumption large-swing operational amplifier for analog-digital converter of production line
  • High-speed low-power consumption large-swing operational amplifier for analog-digital converter of production line
  • High-speed low-power consumption large-swing operational amplifier for analog-digital converter of production line

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0013] Further describe the present invention below in conjunction with accompanying drawing.

[0014] In the present invention, the operational amplifier is a sleeve type cascode operational amplifier with gain bootstrapping, a differential input pair composed of input tail current source tube 1, MOS tubes 2, 3, N-type common grid tubes 4, 5, P-type common gate transistors 6, 7, P-type load transistors 8, 9, a replica circuit composed of MOS transistors 10-15, and bootstrap circuits 42, 43. The P-type load tubes 8 and 9 are connected to the common-mode feedback voltage, and the input tail current source tube 1 and the MOS tube 10 in the tube of the replica circuit form a current mirror. Both the input tail current source tube 1 and the P-type load tubes 8 and 9 work in the deep linear region, which further increases the output swing of the op amp, but the output impedance of the input tail current source tube 1 working in the deep linear region is small. It causes the decrea...

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 belongs to the technical field of integrated circuits, in particular to a high-speed low-power consumption large-swing operational amplifier for an analog-digital converter of a production line. The operational amplifier consists of an input tail current source tube, differential input geminate transistors, an N-type co-gate tube, a P-type co-gate tube, a P-type load tube, a duplicate circuit and a bootstrap circuit. A gain-boosting sleeve type cascade structure is adopted, so the tail current source tube and the PMOS load tube work in a linear area to increase the output swing; and the duplicate circuit dynamically regulates the grid voltage of the tail current source to maintain constant current and increase output impedence so as to improve the common-mode rejection ratio and the power rejection ratio. The operational amplifier realizes high speed, low power consumption, large output swing, high common-mode rejection ratio and high power rejection ratio.

Description

technical field [0001] The invention belongs to the technical field of integrated circuits, and in particular relates to a high-speed, low-power consumption and large-swing operational amplifier used for pipeline analog-to-digital converters. Background technique [0002] The design of high-speed, low-power analog-to-digital converters is the overall development trend in the design of mixed-signal system chips today, and it has a wide range of applications in data communication, liquid crystal display drivers, SOC systems, 10 / 100M Ethernet, etc. . Among the many kinds of analog-to-digital converter circuit structures, the pipeline structure has become the first choice because of its trade-off advantages in speed, accuracy and power consumption. [0003] Each stage of the pipeline A / D converter needs to sample and hold the analog results output by the previous stage, which requires an operational amplifier with switched capacitors. Its speed, power consumption, swing, noise,...

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
IPC IPC(8): H03F3/45H03M1/12
Inventor 任俊彦范明俊舒光华束晨许俊李宁叶凡
Owner FUDAN UNIV
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