Data retention in operational and sleep modes

Details Data retention in operational and sleep modes Data retention in operational and sleep modes

2008-09-19

2009-11-10

Wells, Kenneth B. (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Particular stable state circuit

C327S544000

Reexamination Certificate

active

07616041

ABSTRACT:
A circuit is disclosed for retaining a signal value during a sleep mode while a portion of said circuit is powered down comprising: a clock signal input operable to receive a clock signal; at least one latch clocked by said clock signal; a data input, a data output and a forward data path therebetween, wherein a signal value is operable to be received at said data input, is clocked through said at least one latch and passes to said data output along said forward data path; at least one of said at least one latch comprises a retention latch operable to retain a signal value during said sleep mode, said retention latch not being located on said forward data path; and a tristateable device, said tristateable device being arranged between said forward data path and said retention latch and being operable to selectively isolate said retention latch from said forward data path in response to receipt of a first sleep signal; wherein in response to receipt of a second sleep signal, said second sleep signal being received after said first sleep signal, said circuit is operable to enter said sleep mode such that a voltage difference across said portion of said circuit is reduced such that said portion of said circuit is powered down, and a voltage difference across said retention latch and said tristateable device is maintained.

REFERENCES:
patent: 7170327 (2007-01-01), Aksamit
patent: 7183825 (2007-02-01), Padhye et al.
patent: 7248090 (2007-07-01), Ramprasad
patent: 7514975 (2009-04-01), Frederick et al.

Affiliated with

Also associated with

Rating

Data retention in operational and sleep modes does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Data retention in operational and sleep modes, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Data retention in operational and sleep modes will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4082811