Power amplifier (PA) with improved power regulation

Details Power amplifier (PA) with improved power regulation Power amplifier (PA) with improved power regulation

2006-06-13

2006-06-13

Matar, Ahmad F. (Department: 2642)

Telecommunications

Transmitter

Power control, power supply, or bias voltage supply

C455S127200, C455S127300, C455S115200

Reexamination Certificate

active

07062237

ABSTRACT:
A circuit for regulating the power provided to a load connected to an output of a power amplifier. The circuit includes an amplitude detector that outputs a voltage corresponding to the amplitude of the signal outputted by the power amplifier. This output voltage is a function of the impedance of the load. Thus, when the impedance of the load changes, the output voltage also changes. Given a constant current into the load, it is the load impedance that determines the power delivered to the load. Therefore, because the output voltage reflects changes in the impedance of the load, the output voltage can be used by a regulator circuit to maintain a constant output power, regardless of changes in the impedance of the load.

REFERENCES:
patent: 3449680 (1969-06-01), Schilb et al.
patent: 6008698 (1999-12-01), Dacus et al.
patent: 6430402 (2002-08-01), Agahi-Kesheh
patent: 6633750 (2003-10-01), Dacus et al.
Standard Search Report as Prepared by the ISA/EP in connection with U.S. patent application No. 09/874,130 as filed on Jun. 5, 2001.

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