S class amplification circuit oriented to current

Abstract

The utility model relates to a class S amplifying circuit for current. From the standpoint of current, by adopting the technologies of virtual load, collector electrode counter voltage excitation and special feedback network, the utility model eliminates the disadvantages of the traditional amplifying circuits class A, class B and class AB, realizes the functions of voltage augment, current augment and power output. The utility model has advantages of small distortion, fast speed, strong drive force, high safety, no output short circuit fault and no burn-out load, which is simple structure, and good for miniature.

Description

1. Technical field [0001] The invention relates to a signal amplifying circuit in the field of analog electronics, in particular to an audio frequency power amplifying circuit with extremely high requirements on distortion, conversion rate and frequency response. 2. Background technology [0002] In December 1947, Shockley, Bardeen and Bratton of Bell Laboratories in the United States invented the transistor. Compared with electron tubes, transistors have many advantages: small size, light weight, long life, low energy consumption, simple manufacturing process, and no need to warm up when used. Transistors have gradually replaced electronic tubes in most fields, but they still cannot completely replace electronic tubes, especially in the field of Hi-Fi (High-Fidelity: high-fidelity) audio and professional audio processing. Although the amplifiers made of transistors have higher indicators, they have too much distortion due to odd harmonic waves, and the sense of hearing is ...

AI Technical Summary

Problems solved by technology

[0008] 1. Because the input signal is a voltage, a very good voltage variable current unit is needed to convert the input voltage signal into a current signal, and designing a low-distortion high-speed voltage variable current unit itself is a difficult problem

[0009] 2. The bias current of the current amplifier circuit is also a design problem

[0010] 3. The current current amplification circuit can only amplify the current, but cannot amplify the voltage at the same time, and the power output requires the result of simultaneous amplification of current and voltage.

Images