0-10M wideband amplifier

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

Inactive Publication Date: 2014-03-12
董启环
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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 a linear amplification of 0-10MHz. 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 wideband 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 in particular relates to a 0-10M wideband amplifier, which comprises a first-stage double-ended differential amplifier circuit, a second-stage cobase symmetrical voltage amplifier circuit, a third-stage single-tube driving circuit and a fourth-stage push-pull current amplifier circuit. The amplifier is capable of linearly amplifying a signal with a frequency range of 0-10MHZ and amplitude of 0.25V, the output voltage amplitude can reach 15V, and the load capacity is 50 ohms. According to the amplifier provided by the invention, the full-band amplification can be realized without switching input signals; a common emitter-common base-common emitter circuit is used to improve the high-frequency gain and linearity of full band. The amplifier provided by the invention can be used for amplifying electronics, communications, voice and image signals, and can be used as a signal generator with high load capacity and a power system broadband and high-frequency transient traveling wave signal generator with certain load 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 Applications(China)
IPC IPC(8): H03F3/45
Inventor 董启环
Owner 董启环
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