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0-10m broadband amplifier

A broadband, amplifier technology, applied in the field of broadband amplifiers, can solve problems such as difficult to achieve, it is difficult for amplifiers to take into account low-frequency and high-frequency characteristics, and amplifiers cannot achieve linear amplification.

Inactive Publication Date: 2016-08-17
FUDAN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the actual measurement results show that this type of amplifier cannot achieve linear amplification of 0~10MHz, and even a broadband amplifier composed of an operational amplifier and a push-pull tube is difficult to achieve a broadband frequency range of 0-10M. frequency characteristics

Method used

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  • 0-10m broadband amplifier

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Embodiment Construction

[0021] Below in conjunction with accompanying drawing, further describe the present invention.

[0022] figure 1 It is a general diagram of the implementation hardware circuit of the present invention. The actual details are as follows:

[0023] Main part of the present invention comprises:

[0024] A differential amplifier circuit for double-ended input and double-ended output for signal input (composed of the first transistor Q1 and the second transistor Q2);

[0025] Mirror constant current source circuit for stable operating point (consisting of the ninth transistor Q9 and the thirteenth transistor Q10; the third transistor Q3 and the fourth transistor Q4 form a mirror current source as a differential amplifier stage Active load and provide appropriate bias current for the first transistor Q1 and the second transistor Q2 to improve its stability);

[0026] A common-base symmetrical amplifier circuit for voltage amplification (composed of the eleventh triode Q11 and the...

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Abstract

The invention belongs to the technical field of electronics, and particularly relates to a 0-10M broadband amplifier. The 0-10M broadband amplifier is composed of a first stage double-end differential amplification circuit, a second stage common-base symmetrical voltage amplification circuit, a third stage single tube push circuit and a fourth stage push-pull current amplification circuit. The amplifier can linearly amplify signals of which the frequency range is 0-10MHZ, and the amplitude is 0.25V, the output voltage amplitude can reach 15V, and the load capacity is 50 Ohm. Full-band amplification can be achieved without switching input signals, and high-frequency gains and full-band linearity are increased through a common-emitter common-base common-emitter circuit. The 0-10M broadband amplifier can be used for amplifying electronic signals, communication signals, voice signals and image signals, and can be used as a signal generator with high load capacity and a broadband and high-frequency transient state travelling wave signal generator with certain capacity.

Description

technical field [0001] The invention belongs to the field of electronic technology, and in particular relates to a broadband amplifier. Background technique [0002] In many electronic experiments and applications, it is necessary to amplify video signals and full-frequency signals of various signals or noises. Its spectrum is very wide, ranging from a dozen Hz to several megahertz or even hundreds of megahertz. Because this amplifier has a wide frequency band, it is referred to as a broadband amplifier. This kind of amplifier has the following characteristics: large enough gain and output range; wide enough passband; high stability; generally low power. Commonly used amplifier circuits directly use operational amplifiers, such as AD829 produced by American Analog Devices Corporation, THS6012 produced by Texas Instruments Semiconductor Corporation, etc., and their bandwidth can reach 600M. However, the actual measurement results show that this type of amplifier cannot achi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/32H03F1/42H03F3/45
Inventor 董启环杨涛李冰玉
Owner FUDAN UNIV
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