Subcarrier signal generator for use in stereo tuners

Details Subcarrier signal generator for use in stereo tuners Subcarrier signal generator for use in stereo tuners

1982-12-16

1985-03-19

Rubinson, Gene Z.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Broadcast or multiplex stereo

455265, 329122, H04H 500

Patent

active

045063761

ABSTRACT:
First and second rectangular signals which are 90.degree. out of phase with each other are derived by comparators and an RS flip-flop from a symmetrical triangular wave signal. The first rectangular signal is halved in frequency by a frequency divider, the output of which is supplied to an adder. The second rectangular wave signal is also delivered to the adder. An output from the adder is converted by a bandpass filter into a sine-wave subcarrier signal in synchronism with a stereo pilot signal in an FM stereo tuner. The first and second rectangular signals may be derived by a pair of D-type flip-flops from a pulse signal.

REFERENCES:
patent: 3714595 (1973-01-01), Denenberg et al.
patent: 3842211 (1974-10-01), Metro
patent: 4334125 (1982-06-01), Inoue
patent: 4356350 (1982-10-01), Ienaka

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