Amplifiers – With control of power supply or bias voltage – With control of input electrode or gain control electrode bias
Patent
1995-07-21
1997-02-25
Mullins, James B.
Amplifiers
With control of power supply or bias voltage
With control of input electrode or gain control electrode bias
330138, 330279, 330280, 455126, H03G 330
Patent
active
056062850
ABSTRACT:
A power control circuit having a saturation preventing control loop including a variable gain amplifier, an RF power amplifier, a directional coupler, a detecting circuit, a comparator, a switch, and an adder. When the signal level of an output signal of the comparator is low, the switch is turned on. When the signal level of the output signal of the comparator is high, the switch is turned off. A system power control loop includes a system power control terminal, the adder, and the variable gain amplifier. Since the saturation preventing control loop is provided with the switch, the saturation preventing control loop operates only when the signal level of the amplified signal is larger than a reference value. The system power control loop can properly operate according to a system power control signal supplied from the system power control terminal.
REFERENCES:
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patent: 5283533 (1994-02-01), Hori
patent: 5432473 (1995-07-01), Mattila et al.
Jurg Hinderling et al, "Modulator-Demodulator Circuits for CDMA Digital Portable Mobile Telephone System Condensed on a Single Chip", Nikkei Electronics, Apr. 26, 1993 pp. 163-175.
Klein S. Gilhousen et al, "On The Capacity Of A Cellular CDMA System", IEEE Transaction on Vehicular Technology, vol. 40, No. 2, May 1991, pp. 303-311.
Kuhlman, Jr., "High-Power Solid-State 5.9-12.4 GHZ Sweepers", Hewlett-Packard Journal, vol. 28, No. 3, Nov. 1976, pp. 19-24.
Onodera Tetsuo
Wang Hefeng
Mullins James B.
OKI Electric Industry Co., Ltd.
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