Amplifiers – With semiconductor amplifying device – Including gain control means
Patent
1984-12-17
1985-06-11
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including gain control means
330289, H03G 330
Patent
active
045231559
ABSTRACT:
Improved temperature compensated, automatic output control (AOC) circuitry for RF signal power amplifiers is described that maintains the output power within one-half dB of a selected one of eight power levels varying from nine milliwatts to five watts, a dynamic range of twenty-eight dB. The amplification of the RF signal amplifier is proportional to a drive current signal provided by a current amplifier. A half-wave rectifier is coupled to the output of final amplifiers for generating an output power signal that has a magnitude proportional to the output power. The half-wave rectifier is temperature compensated for and biased by a diode coupled to the rectifier by one resistor and coupled to supply voltage by another resistor. The output power voltage is further coupled to an amplifier having an amplification factor selected by level control signals. The amplified output power signal is coupled to a comparator which varies the drive current provided by the current amplifier in response to the voltage difference between the amplified output power signal and a reference voltage.
REFERENCES:
patent: 3449680 (1969-06-01), Schilb et al.
patent: 3496415 (1970-02-01), Ruthenberg et al.
patent: 3641451 (1972-02-01), Hollingsworth et al.
patent: 3646397 (1972-02-01), Ruthenberg et al.
patent: 3651379 (1972-03-01), Moisand et al.
patent: 3652947 (1972-02-01), Hollingsworth
patent: 3652948 (1972-02-01), Fierstein et al.
patent: 3671878 (1972-06-01), Becker
patent: 3866136 (1975-02-01), Augustin
patent: 3988644 (1976-10-01), Krone
patent: 4001711 (1977-01-01), Knutson et al.
patent: 4019150 (1977-04-01), Lurey et al.
patent: 4041396 (1977-08-01), Fedde
patent: 4114108 (1978-09-01), Faulkenberry et al.
patent: 4122400 (1978-10-01), Medendorp et al.
patent: 4146847 (1979-03-01), Otao et al.
patent: 4287466 (1981-09-01), Quick
patent: 4313210 (1982-01-01), Hume et al.
patent: 4367443 (1983-01-01), Hull et al.
patent: 4446440 (1984-05-01), Bell
patent: 4447783 (1984-05-01), Quick
"Advanced Mobile Phone System", 800 MHz High Capacity Mobile Radiotelephone, Manual #68P81039E25-A, Motorola, Inc. Service Publications, 1301 E. Algonquin Road, Schaumburg, IL 60172.
OKI Advanced Communications; Equipment Manual Published by FCC, 1-4-83, FIG. 3-2, (Part of FCC Type Acceptance Documents).
Cristiano Gary M.
Stone Richard M.
Walczak Thomas J.
Gillman James W.
Hackbart Rolland R.
Jenski Raymond A.
Motorola Inc.
Mottola Steven J.
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