Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1989-02-09
1992-09-22
Chin, Stephen
Pulse or digital communications
Spread spectrum
Direct sequence
307511, H04L 700
Patent
active
051503867
ABSTRACT:
A clock multiplier/jitter attenuator circuit provides a stable clock which is a multiple frequency of the average frequency of an external digital data stream. The external data is written into successive storage cells of a FIFO at its own clock rate and read out of the FIFO at the rate of an internal clock signal which is formed by frequency dividing the stable clock. The relative locations of the cell being written into and the cell being read out of are determined at periodic time intervals, and these relative locations are used to adjust the frequency of an internal oscillator which generates the stable clock. The instantaneous jitter on the digital data stream is absorbed by the FIFO.
REFERENCES:
patent: 3992580 (1976-11-01), Bittel et al.
patent: 4085288 (1978-04-01), Vis Wanathan
patent: 4129748 (1978-12-01), Saylor
patent: 4151485 (1979-04-01), LaFratta
patent: 4166979 (1979-09-01), Waggener
patent: 4181975 (1980-01-01), Jenkins
patent: 4270183 (1981-05-01), Robinson et al.
patent: 4321483 (1982-03-01), Dugan
patent: 4534044 (1985-08-01), Funke et al.
patent: 4539531 (1985-09-01), Thomas et al.
patent: 4551845 (1985-11-01), ab der Halden
patent: 4633488 (1986-12-01), Shaw
patent: 4716575 (1987-12-01), Douros et al.
patent: 4718074 (1988-01-01), Mannas et al.
patent: 4743857 (1988-05-01), Childers
patent: 4805197 (1989-02-01), VanDerJagt et al.
patent: 4849704 (1989-07-01), Thornton
Yarak, Dennis et al., "A 2.56 Mb/s Digital Local-Loop Transmitter/Receiver," 1985 IEEE International Solid-State Circuits Conference, 32nd ISSCC. Digest of Technical Papers, pp. 154-155, 330, 1985, New York, NY.
Hein Jerrell P.
Sooch Navdeep S.
Stern Kenneth J.
Chin Stephen
Crystal Semiconductor Corporation
LandOfFree
Clock multiplier/jitter attenuator does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Clock multiplier/jitter attenuator, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Clock multiplier/jitter attenuator will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1075452