Amplifiers – With semiconductor amplifying device – Including gain control means
Patent
1993-07-02
1994-07-05
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including gain control means
330136, 330145, 330280, H03G 330
Patent
active
053271017
ABSTRACT:
A distortion limiter for limiting the amount of distortion of an inverting amplifier is disclosed. A comparator produces a pulse when a signal level at an inverting input of the inverting amplifier exceeds a reference voltage level. The pulse charges a capacitor. When the charge on the capacitor is sufficient to raise the gate voltage of a junction field-effect transistor (FET) above cutoff, the FET shunts the input signal to reduce its level. The distortion characteristics can be controlled by using a voltage divider to adjust the voltage across the FET. A bias voltage at the gate of the FET, keeps the FET turned off when the inverting amplifier is not clipping.
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A Dual-Band Audio Limiter, James J. Noble, and Robert J. Bird, Journal of the Audio Engineering Society, pp. 678-684, Dec. 1969, vol. 17, No. 6.
Krochmal Andrew C.
Molinar Alfonso
Neely Gerald D.
Zeff Robert T.
Ford Motor Company
May Roger L.
Mollon Mark
Mullins James B.
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