Speed-locked loop to provide speed information based on die...

Details Speed-locked loop to provide speed information based on die... Speed-locked loop to provide speed information based on die...

2006-01-03

2006-01-03

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Synchronizing

C327S158000

Reexamination Certificate

active

06982580

ABSTRACT:
A speed-locked loop (SLL) circuit to automatically determine overall chip speed, which is a function of the combination of supply voltage, temperature, and processing parameters, and to output the speed information in digital form to speed-compensating circuits in order to significantly reduce their sensitivity to operating conditions. Through negative feedback, a digitally controlled ring oscillator (DCO) is forced to lock at an oscillation frequency close to that specified by a six-bit speed constant input. A three-bit control bus varies the DCO oscillation frequency under digital control until the SLL achieves lock. When the SLL has achieved lock it latches the DCO control bus and outputs it as the speed information. The speed constant input may be varied under software control in order to determine the speed constant value that optimizes performance of speed-compensating circuits under SLL control.

REFERENCES:
patent: 4922141 (1990-05-01), Lofgren et al.
patent: 5347234 (1994-09-01), Gersbach et al.
patent: 5382921 (1995-01-01), Estrada et al.
patent: 5428309 (1995-06-01), Yamauchi et al.
patent: 5687202 (1997-11-01), Eitrheim
patent: 5982833 (1999-11-01), Waters
patent: 5994933 (1999-11-01), Yamanaka et al.
patent: 6005904 (1999-12-01), Knapp et al.
patent: 6028488 (2000-02-01), Landman et al.
patent: 6044122 (2000-03-01), Ellersick et al.
patent: 6052034 (2000-04-01), Wang et al.
patent: 6081146 (2000-06-01), Shiochi et al.
patent: 6188288 (2001-02-01), Ragan et al.
patent: 6633186 (2003-10-01), Bazes

Affiliated with

Also associated with

Rating

Speed-locked loop to provide speed information based on die... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Speed-locked loop to provide speed information based on die..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Speed-locked loop to provide speed information based on die... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3579006