FM demodulator arrangement including hold, delay and switching c

Details FM demodulator arrangement including hold, delay and switching c FM demodulator arrangement including hold, delay and switching c

1991-09-06

1992-06-09

Grimm, Siegfried H.

Demodulators

Frequency modulation demodulator

Having specific distortion, noise or other interference...

360 30, 360 64, 455312, 358330, H03D 300, G11B 2006

Patent

active

051210738

ABSTRACT:
In order to reduce the disturbances caused by the head switch in a videotape recorder, in an arrangement for demodulating an FM modulated signal, a fixed value in the hold circuit used for maintaining the fixed value for the signal during the head switch, is selected such that it is situated at a value the interpolated signal would have had during the head switch time interval (T.sub.1) at an instant situated between 0.3 T.sub.1 and 0.8 T.sub.1 in the head switch interval. This may be realized with a delay unit which realizes a delay T.sub.v for which holds: 0.3 T.sub.1 <T.sub.v <0.8 T.sub.1.

REFERENCES:
patent: 4403262 (1983-09-01), Ito et al.
patent: 4870511 (1989-09-01), Pijnenburg et al.

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