Variable rate timing circuit

Details Variable rate timing circuit Variable rate timing circuit

1980-11-24

1983-01-25

Heyman, John S.

179 251, 179 18FA, 328 44, 328129, 328 75, H04Q 1104, H03K 17296, H03K 2130

Patent

active

043705251

ABSTRACT:
A digital subscriber loop carrier system (FIG. 1) is disclosed in which voice information and supervisory signal information are encoded in pulse code form and multiplexed together into a single digital pulse stream for transmission between a central office location and a remote subscriber location. In order to provide appropriate timing and decoding of the supervisory signals, a multistate timing circuit (FIG. 4) is provided which permits timing a plurality of periods of substantially different durations by enabling different rate clock pulse sources to be applied to the timing counter.

REFERENCES:
patent: 3521171 (1970-07-01), Pinkert
patent: 4079315 (1978-03-01), Mohr
patent: 4275354 (1981-06-01), Suematsu et al.

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