Computer network signal transmission amplifying circuit

Abstract

The invention discloses a computer network signal transmission amplifying circuit. The differential receiving circuit adopts a high input impedance differential amplifier to receive a computer networksignal input end signal; then, the signals enter a low-noise pre-amplification circuit; front small-amplitude amplification is carried out through a low-noise amplification circuit with an MOS transistor T1 as a core. A signal higher than + 5V or a signal lower than 0V is corrected through a triode Q1 and a triode Q2; the operational amplifier AR3 performs positive feedback or negative feedback on an output signal so as to ensure the stability of amplification, a complementary feedback amplitude modulation circuit converts an input 0-5V signal into a stable + 3V-15V signal by using a voltagestabilizing circuit consisting of triodes Q3, Q4 and Q5 in combination with a complementary circuit consisting of an MOS transistor T2, a triode Q6, an MOS transistor T3 and a triode Q8 to achieve linearly controllable amplification; and finally, the output impedance is reduced through an emitter following output circuit, and after voltage stabilization and further filtering, the output impedanceis output to a computer network signal output end. The problem that the output signal strength is unstable and cannot be detected is avoided.

Description

technical field [0001] The invention relates to the technical field of network signal transmission, in particular to a computer network signal transmission amplifying circuit. Background technique [0002] A system that connects multiple computer systems with different geographical locations and independent functions through communication equipment and lines, and uses network software with complete functions to share network resources can be called a computer network. However, when the network signal in the prior art is transmitted through the transmission medium, regardless of the wired transmission medium or the wireless transmission medium, the strength of the signal will be attenuated to varying degrees with the increase of the distance, which affects the transmission speed of the network signal. It will cause the problem that the network signal output terminal (receiver) cannot be detected. Therefore, it is necessary to amplify the network signal entering the network si...

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Problems solved by technology

[0005] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a computer network signal transmission amplification circuit, which has the characteristics of ingenious conception and humanized design, and effectively solves the problem that the prior art cannot be performed according to the strength of the network signal. Different degrees of amplification, resulting in unstable output signal strength

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