FM demodulator for reception of satellite broadcasting

Details FM demodulator for reception of satellite broadcasting FM demodulator for reception of satellite broadcasting

1995-10-31

1997-04-29

Mis, David

Demodulators

Frequency modulation demodulator

Input signal combined with local oscillator or carrier...

329326, 331 10, 331 17, 331 23, 455208, 455214, 455337, H03D 300, H03L 7093

Patent

active

056253192

ABSTRACT:
An FM demodulator demodulating an FM modulated input signal through a PLL circuit, which includes a phase comparator a loop filter, a DC amplifier, a BB amplifier, and a VCO, and outputting the demodulated signal further includes a feedback circuit connected in parallel to DC amplifier and having a resistance which is a function of an external control voltage. The feedback circuit may be connected in parallel to both DC amplifier and BB amplifier. A PIN diode is typically used as a resistance variable element in the feedback circuit.

REFERENCES:
patent: 4031483 (1977-06-01), Formeister

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