Multiplexed pulse tone signal receiving apparatus

Details Multiplexed pulse tone signal receiving apparatus Multiplexed pulse tone signal receiving apparatus

1981-10-05

1983-06-21

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

34082571, 307528, H04Q 910, H03K 500

Patent

active

043896430

ABSTRACT:
A multiplexed pulse tone receiving apparatus for receiving predetermined ones of multiplexed pulse tone signals of the type comprised of pulse tone signals of different tone frequencies, each tone frequency being transmitted during a recurring pulse time slot. The receiving apparatus includes an input gate for supplying all of the multiplexed pulse tone signals to a tone detector. When a particular pulse tone signal having a predetermined frequency is received, gate control circuitry is operative to close the gate and, thereafter, to open the gate periodically only during those time slots in which this same pulse tone signal is received.

REFERENCES:
patent: 4021653 (1977-05-01), Sharp et al.
patent: 4057790 (1977-11-01), Fleming et al.
patent: 4071821 (1978-01-01), Harthill et al.
patent: 4181975 (1980-01-01), Jenkins
patent: 4216463 (1980-08-01), Backof, Jr. et al.
patent: 4309662 (1982-01-01), Baudoux
patent: 4320522 (1982-03-01), Hayes

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