Amplifiers – With semiconductor amplifying device – Including differential amplifier
Patent
1988-03-09
1989-03-28
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including differential amplifier
330279, 330285, 330311, H03G 330
Patent
active
048167720
ABSTRACT:
An automatic gain control (AGC) amplifier, which may be fabricated as a monolithic integrated circuit, provides linear gain response in dB over a wide dynamic range. The AGC amplifier comprises multiple cascode amplifier stages connected in cascade to provide high power handlign capability and high gain. A control voltage is input to a linearization circuit which provides an output to an operational amplifier that functions as a voltage controlled voltage source (VCVS). The VCVS produces a conditioned control voltage which is fed back to the linearization circuit and provided to each of the cascode amplifier stages. The conditioned control voltage provided to each amplifier stage causes current to be removed from the cascode amplifier, thereby lowering its gain. The overall gain of the AGC amplifier is linear in dB with respect to linear changes in the control voltage applied to the linearization circuit.
REFERENCES:
patent: 3469195 (1969-09-01), Harwood
patent: 3665507 (1972-05-01), Peil
patent: 3886380 (1975-05-01), Sobajima et al.
patent: 4054849 (1977-10-01), Yamada
patent: 4223274 (1980-09-01), Paulke et al.
patent: 4380711 (1983-04-01), Cunningham
patent: 4426625 (1984-01-01), Harwood et al.
patent: 4514702 (1985-04-01), Zogg
patent: 4607234 (1986-08-01), Nordholt et al.
Olson, "Log Function Generator", IBM Technical Disclosure Bulletin, vol. 7, No. 7, Jul. 1964, pp. 133, 134.
Hamann H. Fred
McFarren John C.
Mullins James B.
Murrah M. Lee
Rockwell International Corporation
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