Telecommunications – Receiver or analog modulated signal frequency converter – Local control of receiver operation
Patent
1981-11-16
1983-09-20
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Local control of receiver operation
455266, 455307, 455339, H04B 116
Patent
active
044060190
ABSTRACT:
In an amplitude modulation radio receiver a relatively narrow band filter is placed before the receiver detector and a relatively wide band filter is placed just prior to the IF amplifier stages. An IF stage controlled by receiver AGC is designed to have a saturation or clipping level about 6 dB above the normal IF level for that stage. As a result the selectivity characteristic for the receiver will be approximately rectangular and encompass the IF frequency channel if the bandpass of the narrow band filter is chosen to be the IF frequency channel.
REFERENCES:
patent: 3089087 (1963-05-01), Birkenes
patent: 3633119 (1972-01-01), Balbes
patent: 3947771 (1976-03-01), Mathews et al.
patent: 4030035 (1977-06-01), Ienaka et al.
patent: 4245353 (1981-01-01), Bynum
Ide John D.
Novo Mario C.
Settlemire David J.
Christoforo W. G.
Lamb Bruce L.
Ng Jin F.
The Bendix Corporation
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