Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Second order trans-resistance amplifier

A technology of transimpedance amplifiers and resistors, applied in the field of second-order transimpedance amplifiers, can solve the problems that the order of the post-stage filter cannot be alleviated, and the power consumption of the system cannot be reduced, so as to alleviate the pressure of the order, increase the frequency selection characteristics, and increase the power consumption of the system. Effect of large roll-off coefficient

Active Publication Date: 2018-10-12
SOUTHEAST UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the existing transimpedance amplifiers cannot alleviate the order of the post-stage filter, and cannot reduce the power consumption of the system

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
  • Second order trans-resistance amplifier
  • Second order trans-resistance amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0014] The present invention will be further explained below in conjunction with the accompanying drawings.

[0015] Such as figure 1 As shown, the present invention provides a second-order transimpedance amplifier, including a first-stage circuit 1, a second-stage circuit 2 and a capacitive coupling circuit 3, and the first-stage circuit 1 and the second-stage circuit 2 are performed by the capacitive coupling circuit 3. connection, the first stage circuit 1 and the second stage circuit 2 are symmetrical circuit structures. Both the first-stage circuit 1 and the second-stage circuit 2 use the low-impedance nodes of the super source follower to construct a virtual point, and at the same time use the differential pair to construct an AC virtual point, and isolate the first-stage circuit 1 and the second-stage circuit through a capacitive coupling circuit 3 2 DC operating point to achieve second-order filtering.

[0016]Wherein, the first stage circuit 1 includes PMOS transist...

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 second order trans-resistance amplifier, comprising a first stage circuit, a second stage circuit and a capacitive coupling circuit, wherein the first stage circuit and the second stage circuit are connected by virtue of the capacitive coupling circuit; the first stage circuit and the second stage circuit respectively construct a virtual site by utilizing a low impedancenode of a super source follower, constructing an alternating current virtual site by utilizing a differential pair at the same time, isolating direct current operating points of the first stage circuit and the second stage circuit by virtue of the capacitive coupling circuit, and realizing second order filtering. Order of the second order trans-resistance amplifier disclosed by the invention is increased, and a rolloff factor of filtering is increased compared with the previous first order trans-resistance amplifier; by virtue of a frequency spectrum shifting characteristic of a passive mixer,a frequency selection characteristic of a radio frequency front end is improved; and the trans-resistance amplifier has second order impedance characteristic and can reduce order pressure of a backward stage filter, so that power dissipation of the backward stage filter is reduced.

Description

technical field [0001] The invention belongs to the technical field of transimpedance amplifiers, in particular to a second-order transimpedance amplifier. Background technique [0002] In the radio frequency receiving system, the passive mixer mixes the radio frequency signal into an intermediate frequency current signal. Processing, so the transimpedance amplifier is also very important in the radio frequency receiving system. Previous transimpedance amplifiers either use the feedback structure of the operational amplifier or the structure of the current buffer, which can form a first-order filter effect. However, the existing transimpedance amplifiers cannot alleviate the order of the post-stage filter, and cannot reduce the power consumption of the system. Contents of the invention [0003] Purpose of the invention: Aiming at the problems existing in the prior art, the present invention provides a method that can not only alleviate the order of the post-stage filter,...

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): H03F1/02H03F3/193H03F3/45
CPCH03F1/0211H03F3/193H03F3/45179H03F2200/451H03F2203/45031
Inventor 吴建辉冯世雄陈超李红仝飞侯冠男伍绍君
Owner SOUTHEAST UNIV
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com