Power control circuit and method

Details Power control circuit and method Power control circuit and method

2006-12-26

2006-12-26

Nguyen, Patricia (Department: 2817)

Amplifiers

With semiconductor amplifying device

Including gain control means

C330S129000, C330S296000

Reexamination Certificate

active

07154338

ABSTRACT:
A method (400) for controlling power and an amplifier and associated power control circuit (100) with a power amplifier (110) coupled through a current sensing resistor (Rsen) to a supply voltage line (vcc). There is also a current to voltage converter (120) having a converter output (135) and at least one converter input, the converter input being coupled to the supply voltage line (Vcc) of the power amplifier (110). A voltage reference providing circuitry (140) is coupled to a second input (152) of an integrator (150) that also has an integrator output (153) and a first input (151) coupled to the converter output (135) and a direct current biasing circuit (195) couples the integrator output ((153) to an amplifier input (111) of amplifier (110). The method (400) and circuit (100) use a time dependent pre-defined voltage characteristic supplied to the integrator (150).

REFERENCES:
patent: 5422598 (1995-06-01), Maeda et al.
patent: 5559423 (1996-09-01), Harman
patent: 5818707 (1998-10-01), Seong et al.
patent: 5959443 (1999-09-01), Littlefield
patent: 6025754 (2000-02-01), Czora
patent: 6563385 (2003-05-01), Wojslaw
patent: 6665525 (2003-12-01), Dent et al.
patent: 6734729 (2004-05-01), Andrys et al.

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