Automatic power control circuit for use with a radio...

Details Automatic power control circuit for use with a radio... Automatic power control circuit for use with a radio...

H - Electricity

04

B

H04B 1/40 (2006.01) H03G 3/20 (2006.01) H04B 1/04 (2006.01)

Patent

CA 2042950

An automatic power control (APC) circuit for use with a radio telecommunication apparatus. The apparatus transmits radio frequency signals at a power level prescribed by a level control signal. In the automatic power control circuit, transmission power level is detected from the output of a duplexer. Accordingly, even if signal loss in a filter of the duplexer varies on the frequency of signals passing therethrough, transmission power level is accurately detected and the detected level is feedbacked to an amplifier of the APC circuit.

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