Title: Multiplexed pulse tone signal receiving apparatus

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.

Do you think this is a good invention? Vote now:

Votes so far: For:(0) Against:(0)
Other info:

Inventors: Hill, Desmond W. (Brentwood Bay, CA)

Application Number: 06/308498
Filing Date: 1981-10-05
Publication_date: 1983-06-21
Assignee: EDISON CONTROL CORP

Primary Class(es): 340/5.100 340/825.710, 340/10.100, 340/2.100, 327/43
Other Classes: G08C15/10; G08C15/00; H04Q9/10; H03K5/00
US Patent Ref:

4021653	May, 1977	Sharp et al.	340/825.71	Digital programmable tone detector
4057790	November, 1977	Fleming et al.	340/825.48	Personal aid signalling system
4071821	January, 1978	Harthill et al.	324/83Q	Quadrature correlation phase determining apparatus
4181975	January, 1980	Jenkins	307/518	Digital delay line apparatus
4216463	August, 1980	Backof, Jr. et al.	340/825.71	Programmable digital tone detector
4309662	January, 1982	Baudoux	307/528	Circuit for rapidly resynchronizing a clock
4320522	March, 1982	Hayes	340/825.71	Programmable frequency and signalling format tone frequency encoder/decoder circuit

Other Refs:
Primary Examiner: Yusko, Donald J.
Assistant Examiner:
Attorney: Eslinger, Lewis H.

Claims:

What is