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

a differential amplifier

A technology of differential amplifiers and transistors, used in differential amplifiers, amplifiers, DC-coupled DC amplifiers, etc., can solve problems such as thermal-induced distortion of AC signals, and achieve the effect of reducing the impact of thermal-induced distortion

Active Publication Date: 2019-11-12
隐士音响(杭州)有限公司
View PDF4 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In view of this, the present invention provides a differential amplifier to solve the problems in the prior art that are easily affected by external temperature and thermally induced distortion when processing AC signals

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
  • a differential amplifier
  • a differential amplifier
  • a differential amplifier

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0033] The invention provides a differential amplifier to solve the problems in the prior art that are easily affected by external temperature and easily generate thermal distortion when processing AC signals.

[0034] Specifically, the differential amplifier, such as figure 2 As shown, it includes: a first transistor Q1, a second transistor Q2, a first resistor R1, a second resistor R2, a servo circuit 101 and a heating element 102; where:

[0035] The serv...

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 provides a differential amplifier. The heating amount of a heating body is adjusted through a servo circuit; furthermore, current flowing through a first transistor and a second transistor is adjusted through output current of the heating body, so that the heating amount of the first transistor and the second transistor is adjusted; therefore, differential pair transistors composed of the first transistor and the second transistor can work at temperature given by the servo circuit through the heating body; furthermore, the first transistor and the second transistor can be differential pair transistors performing pairing after performing parameter testing at the given temperature; the matching degree influence of environment temperature on the differential pair transistors in the prior art can be avoided; furthermore, when the differential amplifier is used for processing an alternating-current signal, due to setting, temperature change dynamically due to the signal is far less than temperature provided for the differential pair transistors by the servo circuit through the heating body; and thus, influence of distortion due to heat can be reduced.

Description

technical field [0001] The invention relates to the technical field of differential pair tubes, in particular to a differential amplifier. Background technique [0002] The differential amplifier composed of differential pair tubes is a basic signal amplifier, which is widely used in various analog signal processing circuits. [0003] For such as figure 1 For the basic differential pair amplifier shown, it is the most ideal situation that the parameters of the differential pair transistors Q1 and Q2 are exactly the same. However, in practice, due to individual differences in the magnification, turn-on voltage and other characteristics of the differential pair transistors, even transistors of the same model and batch, the parameters cannot be completely equal. The greater the mismatch of these characteristics, the farther the performance of the transistor differential pair will be from the ideal value and design value, thereby degrading the performance of the differential a...

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 Patents(China)
IPC IPC(8): H03F1/30H03F3/45
CPCH03F1/30H03F1/301H03F3/45
Inventor 郭景希
Owner 隐士音响(杭州)有限公司