Gain controlled amplifier

Details Gain controlled amplifier Gain controlled amplifier

1980-09-16

1983-04-12

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including differential amplifier

330284, H03F 345, H03G 310

Patent

active

043799957

ABSTRACT:
A gain controlled amplifier comprising a first means for providing a first current and a second current corresponding to an input signal, a second means for providing a first attenuated current corresponding to the first current, a third means for providing a second attenuated current corresponding to the second current, a fourth means for providing a control signal for changing magnitude of the first and second attenuated currents, and fifth means for providing an output signal corresponding to amplitudes of the first and second attenuator currents. The first means comprises a split current generator for separately providing the first current corresponding to the positive component of the input signal and the second current corresponding to the negative component of the input signal.

REFERENCES:
patent: 3757240 (1973-09-01), Fogg

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