Signal amplification circuit

A signal amplification circuit and circuit technology, which is applied in amplifiers, power amplifiers, radio frequency amplifiers, etc., can solve the problems of poor stability of the amplifying circuit, prevent signal leakage in the working frequency band, facilitate design and layout, and improve stability. Effect

Active Publication Date: 2019-02-01
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a signal amplifying circuit, which aims to solve the problem that the effect of series resistance or out-of-band attenuation network on the input end of the multi-stage amplifier is not outstanding for improving the stability of the amplifying circuit

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Embodiment Construction

[0028] It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0029] 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 part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0030] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relationship between the components in a certain posture (as shown in the accompanying drawings). Relative positi...

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Abstract

The invention discloses a signal amplification circuit. The signal amplification circuit comprises a stabilizing circuit, the stabilizing circuit comprises an out-of-band signal suppression circuit, aradio frequency selective device and an impedance transformer; a first end of the impedance transformer has high impedance, a second end of the impedance transformer is connected with one end of theradio frequency selective device, the other end, relative to the impedance transformer, of the radio frequency selective device is grounded; the two ends of the out-of-band signal suppression circuitare respectively connected with the two ends of the radio frequency selective device; a first end of the impedance transformer is connected with the output terminal of an input matching circuit and the input terminal of the amplifier, or the first end of the impedance transformer is connected with the output terminal of the amplifier and the input terminal of an output matching circuit, or the first end of the impedance transformer is connected with the input terminal of the input matching circuit and a radio frequency input terminal used for inputting a signal, or the impedance transformer isconnected with the output terminal of the output matching circuit and a radio frequency output terminal used for outputting a signal. The signal amplification circuit disclosed by the invention is improved in stability.

Description

technical field [0001] The invention relates to the field of circuits, in particular to a signal amplifying circuit. Background technique [0002] With the development of system integration technology, multi-stage amplifiers are widely used. In order to improve the stability of this kind of multi-stage amplifying circuit, the input end of the multi-stage amplifier is usually connected in series with a resistor or an out-of-band attenuation network, but when the input end of the multi-stage amplifier is connected in series with a resistor or an out-of-band attenuation network, it only It can act on the input end of the pre-stage small-signal amplifier of the multi-stage amplifier, and other areas of the packaged multi-stage amplifier have no effect, so this method does not have a prominent effect on improving the stability of the circuit. Contents of the invention [0003] The main purpose of the present invention is to provide a signal amplifying circuit, aiming to solve ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/02H03F1/56H03F3/195H03F3/21H03F3/213
CPCH03F1/0288H03F1/56H03F3/195H03F3/211H03F3/213H03F2200/451
Inventor 张利
Owner ZTE CORP
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