H - Electricity – 03 – F
Patent
H - Electricity
03
F
330/30, 330/31,
H03F 1/30 (2006.01) H03F 1/02 (2006.01) H03F 1/34 (2006.01) H03F 3/19 (2006.01)
Patent
CA 2017904
Abstract of the Disclosure: In a high frequency amplifier circuit comprising an input amplifier device (23) and an output amplifier (21) which are supplied with a total electric power of a supply current value variable dependent on a total power consumption in the input amplifier device and the output amplifier, a current detection circuit (30) detects the supply current value to produce a current detection signal representative of the supply current value. A bias voltage control circuit (31) controls a bias voltage of the output amplifier in response to the current detection signal to make the total power consumption have an optimum value. Preferably, the bias voltage control circuit should comprise a bias voltage generator for generating a control voltage, a bias voltage controller for producing a bias control signal dependent on the supply current value, and a modulator for modulating the control voltage into a modulated voltage for use as the bias voltage.
Corporation Nec
Smart & Biggar
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