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Single-slip amplifying circuit for eliminating direct-current offset

A differential amplifier circuit, amplifying circuit technology, applied in the direction of DC-coupled DC amplifier, differential amplifier, amplifier, etc., can solve problems such as signal distortion

Pending Publication Date: 2021-05-11
WUHAN POST & TELECOMM RES INST CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present application provides a single-slip amplifying circuit that eliminates DC offset to solve the problem of signal distortion caused by DC offset in the related art single-ended to differential circuit

Method used

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  • Single-slip amplifying circuit for eliminating direct-current offset
  • Single-slip amplifying circuit for eliminating direct-current offset
  • Single-slip amplifying circuit for eliminating direct-current offset

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Embodiment Construction

[0028] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0029] The embodiment of the present application provides a single-slip amplifier circuit that eliminates DC offset, which can eliminate the DC deviation output by the single-slip amplifier circuit to output differential signals OUTP and OUTN with the same DC level to improve signal transmission quality .

[0030] see figure 1 As show...

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Abstract

The invention provides a single-to-differential amplification circuit for eliminating DC offset, and relates to the technical field of electronic circuits; wherein the single-to-differential amplification circuit comprises a differential amplification circuit which is configured to receive an input signal INP by one input end and output a differential signal OUTP and a differential signal OUTN by amplifying the input signal INP; and a comparison amplification circuit which is configured to receive the differential signal OUTP and the differential signal OUTN, obtain a reference signal INN of the direct-current level by comparing the direct-current level of the differential signal OUTP and the direct-current level of the differential signal OUTN, and feed back the reference signal INN to the other input end of the differential amplification circuit. According to the application, the direct current deviation output by the single-to-differential amplification circuit is eliminated, so that the differential signal OUTP and the differential signal OUTN with the same direct current level are output, and the transmission quality of the signals is improved.

Description

technical field [0001] The present application relates to the technical field of electronic circuits, in particular to a single-slip amplifier circuit for eliminating DC offset. Background technique [0002] In electronic communication, it is often necessary to amplify the signal, and the differential signal is widely used because of its strong anti-interference and ability to effectively suppress electromagnetic radiation. In a differential circuit with single-ended input and double-ended output, when the single-ended signal is converted into a differential signal, the impedance imbalance between the output double-ended signals is likely to cause DC imbalance, which affects the signal analysis and processing at the back end and reduces the Signal transmission efficiency and system sensitivity, linearity and other characteristics. [0003] In the related art, a gain-adjustable low-noise amplifier with a single-ended input and double-ended output is disclosed, including: a s...

Claims

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Application Information

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IPC IPC(8): H03F3/45H03F1/32
CPCH03F3/45179H03F1/3205
Inventor 李维忠肖希王磊余少华
Owner WUHAN POST & TELECOMM RES INST CO LTD
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