High-gain amplifier circuit having voltage/current converter

Details High-gain amplifier circuit having voltage/current converter High-gain amplifier circuit having voltage/current converter

1996-08-13

1998-11-17

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330259, H03F 345

Patent

active

058381970

ABSTRACT:
A high-gain amplifier circuit that can start normal operation quickly after a power supply is turned on. This circuit includes first to n-th differential amplifiers cascade-connected at first to n-th stages, a first input terminal to which a first input signal is applied, a second input terminal to which a second input signal is applied; a first output terminal from which a first output signal is derived, a second output terminal from which a second output signal is derived, and a voltage/current converter applied with the first and second output signals and producing an output current corresponding to an offset between bias components of the first and second output signals. The output current of the voltage/current converter is fed back to the first differential amplifier at the first stage, thereby canceling the offset between the bias components of the first and second output signals. This circuit is applicable to an amplitude limiter for limiting the amplitude of a received signal in a selective-calling radio receiver.

REFERENCES:
patent: 5594387 (1997-01-01), Kagawa

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