Circuit configuration for adjusting the quadrature-axis current

Details Circuit configuration for adjusting the quadrature-axis current Circuit configuration for adjusting the quadrature-axis current

1994-09-06

1996-01-16

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including push-pull amplifier

330267, H03F 330

Patent

active

054851238

ABSTRACT:
A circuit configuration for adjusting the quadrature-axis current component of a push-pull output stage has two transistors of opposed conduction type and is triggered by an input signal. A variable being proportional to the quadrature-axis current component of the push-pull output stage is derived from a comparison circuit. A final control element adjusts the quadrature-axis current components of the push-pull output stage and of the comparison circuit for matching the variable to a reference variable.

REFERENCES:
patent: 3686580 (1972-08-01), Van Den Plassche
patent: 4439743 (1984-03-01), Schwarz et al.
patent: 4752745 (1988-06-01), Pass
patent: 4888559 (1989-12-01), Sevenhans et al.
Data Sheet NE/SA 5230, published by Valvo, Nov. 14, 1986, pp. 429-440.
IEEE Journal of Solid-State Circuits 25 (1990) Feb. No. 1, "A CMOS Large-Swing Low-Distortion Three-Stage Class AB Power Amplifier".

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