FM demodulator including PLL and improved circuitry for eliminat

Details FM demodulator including PLL and improved circuitry for eliminat FM demodulator including PLL and improved circuitry for eliminat

1983-10-18

1986-09-16

LaRoche, Eugene R.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

331 36C, 331177V, H03D 300

Patent

active

046125116

ABSTRACT:
An FM demodulator having a phase comparator, a low-pass filter and a VCO including a variable capacitance diode, an input signal being applied to the phase comparator and a demodulated output signal being taken from the low-pass filter. The FM demodulator further includes a compensating circuit consisting of a non-linear element connected between the demodulated output terminal and the VCO, whereby the secondary distortion in the output signal to be caused due to the non-linearity of the variable capacitance diode is canceled.

REFERENCES:
patent: 4360790 (1982-11-01), Heise
patent: 4523151 (1985-06-01), Bauerschmidt

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