Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1992-02-06
1993-06-15
Chin, Stephen
Pulse or digital communications
Spread spectrum
Direct sequence
328141, H04L 700
Patent
active
052205851
ABSTRACT:
A serial clock generating circuit is configured to frequency-divide an input clock having a frequency which is a number times a serial data transfer rate, so as to generate a serial clock in phase with a received serial data. The serial clock generating circuit comprises an edge detection circuit for detecting a level change of a received serial data so as to generate a level change signal. Three registers stores different set values, and a latch latches one of the different set values. A decrementer decrements the value of the latch in response to each input clock, and a memory circuit holds an arbitrary value for defining a phase deviation discrimination area. A comparison circuit compares the value stored in the memory circuit with the value of the latch at each one input clock, and generates a coincidence signal when a coincidence is obtained. An area detection circuit discriminates a level change position on the basis of the level change signal and the coincidence signal and selects one of the registers to be set to the latch. A flipflop is coupled to the decrementer for generating a serial clock on the basis of the result of the counting of the decrementer.
REFERENCES:
patent: 4896337 (1990-01-01), Bushy, Jr.
patent: 4931986 (1990-06-01), Daniel et al.
patent: 5056120 (1991-10-01), Taniguchi et al.
Katayose Tsuyoshi
Sasaki Takayoshi
Chin Stephen
NEC Corporation
LandOfFree
Serial clock generating circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Serial clock generating circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Serial clock generating circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1048679