Precision timing generation

Details Precision timing generation Precision timing generation

2007-05-22

2007-05-22

Patel, Jay K. (Department: 2611)

Pulse or digital communications

Synchronizers

Synchronizing the sampling time of digital data

C375S354000, C341S131000, C342S357490, C342S450000, C327S231000, C327S270000, C327S105000, C708S313000, C348S592000, C368S113000

Reexamination Certificate

active

10268022

ABSTRACT:
A precision timing generator and an associate method provide a precise clock signal based on a reference clock signal. Using the reference clock signal in a phase locked loop or delay locked loop, a number of clock signals of equal frequency are generated separated consecutively by a known phase. Two of these clock signals of consecutive phases are selected for interpolation for higher precision according to predetermined weights. The resulting interpolated clock signal has a phase offset that is intermediate between the selected clock signals in proportion to the predetermined weights. In one implementation, a second interpolated clock signal is created by selecting and weighting a second group of clock signals using independent selection and weights. The two interpolated clock signals are then combined by logic operations to provide a precise clock signal of predetermined duty cycle and phase.

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