Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Patent
1993-03-09
1994-11-22
Mullins, James B.
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
330279, 455126, A03G 320
Patent
active
053672682
ABSTRACT:
Disclosed is a transmission signal output control circuit which is formed of an RF amplifier circuit for supplying an amplified RF transmission signal to an antenna circuit; a detector connected to the RF amplifier to detect a transmission signal output level of the RF amplifier; a reference signal generation circuit for generating a reference signal having a selectively changeable signal level; a transmission signal output level control circuit for comparing an output of the detector with the reference signal to thereby supply a control signal to the RF amplifier to thereby control an amplification degree of the RF amplifier to make the RF amplifier produce an RF transmission signal level corresponding to the selected signal level of the reference signal; and a DC bias supply circuit connected to the detector a high-frequency choke coil which has an inductance value selected to cooperate with an intrinsic electrostatic capacitance value of the detector to provide parallel resonance at a frequency of the RF transmission signal.
REFERENCES:
patent: 4523155 (1985-06-01), Walczak et al.
patent: 5196806 (1993-03-01), Ichihara
patent: 5245297 (1993-09-01), Claydon et al.
Dudek James
Mullins James B.
Uniden Corporation
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