Diode loaded feed-forward radio frequency amplifier power contro

Details Diode loaded feed-forward radio frequency amplifier power contro Diode loaded feed-forward radio frequency amplifier power contro

1995-03-07

1996-07-09

Eisenzopf, Reinhard J.

Telecommunications

Receiver or analog modulated signal frequency converter

Local control of receiver operation

455 383, 4552262, 4552351, 330136, H04B 106, H04B 700

Patent

active

055354440

ABSTRACT:
A selective call receiver (100) includes a radio frequency amplifier (202) having an output power level that is controllable in an unconditionally stable manner. The selective call receiver (100) includes a loading diode (403) coupled to an output of the radio frequency amplifier (202) and a feed-forward load control (201) coupled to an input of the radio frequency amplifier (202). The feed-forward load control (201) detects an input signal strength and regulates conduction of a current through the loading diode (403). In response to the input signal strength substantially reaching or exceeding a predetermined activation threshold corresponding with a predetermined input signal strength and a maximum output power level, the feed-forward load control (201) adjusts the current causing an impedance of the loading diode (403) to vary in a manner that causes the output power level to remain substantially constant.

REFERENCES:
patent: 3821649 (1974-06-01), Grosjean
patent: 4061970 (1977-12-01), Magneron
patent: 5001776 (1991-03-01), Clark
patent: 5012140 (1991-04-01), Bateman
patent: 5307512 (1994-04-01), Mitzlaff

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