Demodulators – Amplitude modulation demodulator – Having specific distortion – noise or other interference...
Patent
1975-12-30
1976-12-28
Kominski, John
Demodulators
Amplitude modulation demodulator
Having specific distortion, noise or other interference...
329109, H03D 110
Patent
active
040004724
ABSTRACT:
An amplitude modulation envelope detector comprised of a basic voltage doubler envelope detector whose linear dynamic range is increased by a forward bias network and for which the offset voltage is stabilized by temperature drift compensation provided by a temperature compensation network. The forward bias network increases the basic envelope detector linear dynamic range by clamping the basic detector to a predetermined bias voltage which takes the detector components out of the non-linear region of operation, and the temperature compensation network, which is comprised of components matched to those found in the basic envelope detector, stabilizes the offset voltage by providing a signal to the inverting input of an operational amplifier to compensate for the operating characteristic variations of the components in the basic envelope detector and the forward bias network.
REFERENCES:
patent: 3002154 (1961-09-01), Schmitz et al.
patent: 3003122 (1961-10-01), Gerhard
patent: 3348158 (1967-10-01), Dennis
patent: 3386042 (1968-05-01), Moes
Eastland Franklin M.
Marie Camille S.
Schwerdt Christopher B.
Kominski John
Schron D.
Westinghouse Electric Corporation
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