Amplifier circuit, a transmitter and a wireless telephone

Details Amplifier circuit, a transmitter and a wireless telephone Amplifier circuit, a transmitter and a wireless telephone

1998-02-06

1999-10-05

Pascal, Robert

Amplifiers

With semiconductor amplifying device

Including signal feedback means

330 85, H03F 108

Patent

active

059630957

ABSTRACT:
An amplifier circuit, particularly for RF-purposes includes a main current stream of a controllable RF-semiconductor device having a control input, a control means having a control output coupled to the control input for controlling the main current stream, and a compensation circuit having a compensation output coupled to the control input for compensating the controllable semiconductor device. The compensation circuit is constructed so as to be temporarily active during a period of time wherein the control means do not supply a control output signal to the control input of the controllable semiconductor device. This provides a suitable solution for IC's and for dealing with DC-adjustment disturbances in a low DC-current dissipating manner caused by a lack of pull-down capability when the amplifier circuit operates at very high frequencies or at relatively large amplitudes.

REFERENCES:
patent: 3688208 (1972-08-01), Kandiah
patent: 4481481 (1984-11-01), Sleeth et al.
Oswald, IBM Technical Disclosure Bulletin, class B Emitter-Follower, vol. 8, No. 10 Mar. 1996, pp. 1447-1448.

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