Receiver with automatic pass band control
AssigneeSony Corporation
InventorsIkuo Shimizu, Keiko Ichihara
Life of this patent
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Abstract
A receiver having a circuit producing a control signal that has an amplitude proportional to the intensity of an input signal, and a control circuit permitting the passage of high frequency components of a low frequency signal therethrough or preventing the passage thereof, as determined by the control signal. The receiver further includes a control circuit that permits passage of low frequency components of the low frequency signal or prevents passage thereof, as determined by the control signal.
Claims6
In a receiver for modulated information signals the combination for attenuating higher frequency noise as a function of reduced signal strength comprising:
- a detector circuit for demodulating received signals, the output of said detector circuit representing said information and being indicative of the strength of said received signals;
- amplifying means for amplifying said detector circuit output to thereby recover said information;
- circuit means coupled to said detector circuit and responsive to said detector circuit output indicative of said received signal strength for producing a control signal which is a function of said received signal strength;
- and
- coupling means for interconnecting said detector circuit and said amplifying means, said coupling means including:
- first actuable filter means for attenuating frequency components above a predetermined range in said detector circuit output, said first actuable filter means being actuated by said control signal;
- and second actuable filter means for attenuating frequency components below said predetermined range in said detector circuit output, said second actuable filter means being actuated by said control signal and being connected in cascade with said first actuable filter means.
Dependencies are inferred from the claim text.