Configurable drive clock

Details Configurable drive clock Configurable drive clock

1996-11-13

1998-09-01

Heckler, Thomas M.

G06F 110

Patent

active

058023569

ABSTRACT:
An apparatus and method which provides specified hold times for communication signals transmitted from a processing device that is capable of operating at different frequencies, to external devices, is provided. The apparatus includes a clock multiplier which generates an internal clock signal which is a multiple of an external clock, a ring oscillator, which provides a number of outputs of the same frequency as the internal clock, but at fixed phase offsets from the internal clock, and clock select circuitry, which selects one of the outputs from the ring oscillator, depending on the speed of the internal clock, to be used as a drive clock signal for a bus unit. Selection of one of the phase offset outputs provides for a specified hold time regardless of the internal clock speed of the processing device.

REFERENCES:
patent: 4975593 (1990-12-01), Kurakazu et al.
patent: 5359232 (1994-10-01), Eitrheim et al.
patent: 5371880 (1994-12-01), Bhattacharya
patent: 5434996 (1995-07-01), Bell
patent: 5561692 (1996-10-01), Maitland et al.
patent: 5623644 (1997-04-01), Self et al.
patent: 5625806 (1997-04-01), Kromer
patent: 5666322 (1997-09-01), Conkle
patent: 5691660 (1997-11-01), Busch et al.

Affiliated with

Also associated with

Rating

Configurable drive clock does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Configurable drive clock, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Configurable drive clock will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-281770