Amplifying circuit

Abstract

The invention is an amplifying circuit, containing an amplifier which has a positive input end, a negative end, a positive output end and a negative output end; a first input impedance connected between the negative input end and a first input signal; a second input impedance connected between the positive input end and the first input signal; a third input impedance connected between the negative input end and a second input signal; a fourth input impedance connected between the positive input end and the second input signal; a first output impedance connected between the negative input end and the positive output end; a second output impedance connected between the negative input end and the negative output end; a third output impedance connected between the positive input end and the positive output end; and a fourth output impedance connected between the positive input end and the negative output end.

Description

technical field [0001] The invention provides an amplifying circuit, especially an amplifying circuit which utilizes impedance matching to achieve circuit characteristics such as large equivalent input impedance, large voltage gain value (or large voltage attenuation value), and large time constant. Background technique [0002] Since the invention of the first transistor, human beings have entered the so-called electronic age. With the development of various electronic circuit theories and the rapid development of semiconductor manufacturing technology, circuit design work has become increasingly complex and specialized. In various basic circuit structures, the amplifier circuit has always been a very important part. The amplifier circuit includes functions such as signal amplification and power amplification according to different applications, and the signal amplifier circuit is the most common among them. [0003] Please refer to FIG. 1 . FIG. 1 shows a schematic diagram...

AI Technical Summary

Problems solved by technology

[0007] However, in order to achieve the above-mentioned goals, the above-mentioned various passive components (such as resistors, capacitors, inductors, etc.) need to be of relatively large values, and in the manufacturing process of integrated circuits, it will be very expensive to manufacture passive components with large values. Large circuit area, which will greatly increase the cost of integrated circuit manufacturing

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