[SI-LIST] : EMI

Kelly McClellan x2393 (mac@west.smc.com)
Wed, 29 Oct 1997 09:54:04 -0800

There are at least two recent patents in the area of clock
spectrum spreading:

Circuit for generating a spread spectrum clock
PATENT NUMBER- 05610955

Spread spectrum phase-locked loop clock generator with VCO driven by a
symmetrical voltage ramp signal PATENT NUMBER- 05659587

In addition, a similar technique was in use about 20 years
ago for time interval measurements - where multiple measurements
are averaged, a clock with noisy / randomized phase can increase
the effective resolution to a small fraction of the clock period.

regards,
Kelly McClellan
Mgr. Analog LSI
SMC Irvine
mac@west.smc.com
(714)707-2393