Amplifiers – With semiconductor amplifying device – Including field effect transistor
Patent
1995-10-24
1996-11-19
Mottola, Steven
Amplifiers
With semiconductor amplifying device
Including field effect transistor
330285, 330289, H03F 316, H03G 330
Patent
active
055766625
ABSTRACT:
A high dynamic range linear automatic gain control (AGC) circuit that has independent means for temperature compensation. The temperature compensation circuit of this invention can be used in a closed-loop AGC circuit such as is required in a transceiver for compensating the gains of receiver and transmitter amplifiers to ensure that both track closely over ranges of temperature, frequency and load impedance. The temperature compensation signal is coupled to one of the two gates in a field effect transistor (FET) amplifier to maintain a constant gain function over ranges of temperature, frequency and load impedance. Thermal compensation for the transmitter amplifier is derived from the thermal compensation signal for the receiver amplifier.
REFERENCES:
patent: 4207538 (1980-06-01), Goel
patent: 4727337 (1988-02-01), Jason
patent: 5099204 (1992-03-01), Wheatley, III
patent: 5107225 (1992-04-01), Wheatley et al.
patent: 5192919 (1993-03-01), Wieczorek
patent: 5339046 (1994-08-01), Kornfeld et al.
Price J. Michael
Wheatley III Charles E.
White Katherine W.
Miller Russell B.
Mottola Steven
Qualcomm Incorporated
White Katherine W.
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