Circuit and method for automatically adjusting common mode rejec

Details Circuit and method for automatically adjusting common mode rejec Circuit and method for automatically adjusting common mode rejec

1997-11-17

2000-05-30

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330147, 330149, H03F 345, H03F 300, H03F 126

Patent

active

060695331

ABSTRACT:
A circuit and method for automatically adjusting a common mode rejection ratio. The circuit includes a mixing circuit for mixing two input signals received via first and second channel input terminals, eliminating noise from the input signals, and supplying a corresponding output signal; and a controller for simultaneously supplying a DC voltage having a predetermined level to the two channel input terminals when a main power source is initially applied, detecting the level of a voltage fed back from an output terminal of the mixing circuit, and controlling an output voltage level of the mixing circuit based on the detected voltage level.

REFERENCES:
patent: 3581198 (1971-05-01), Shoemaker et al.

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