Power-up initialization circuit that operates robustly over a wi

Details Power-up initialization circuit that operates robustly over a wi Power-up initialization circuit that operates robustly over a wi

1997-09-26

1999-11-09

Palys, Joseph E.

Electrical computers and digital processing systems: support

Digital data processing system initialization or configuration

713100, G06F 9445

Patent

active

059833467

ABSTRACT:
A power-up initialization circuit includes a transistor that generates a positive leakage current at the onset of a power-up ramp voltage. The positive leakage current drives a first node connected to a latch to a first defined state. The latch drives a complementary second node to a second defined state, complementary to the state of the first node. The latch acts as a keeper that is switchable and allows current flow during power-up but prevents leakage current when the power-up is complete and nodes are set to selected states. A keeper is a circuit element that holds a dynamic circuit to a static behavior. One type of keeper is a latch. Another type of keeper is a MOSFET transistor having a thin channel width and a gate terminal connected to a reference such as a ground or VSS reference. A power-up initialization circuit includes a capacitive switch connected to a power source and connected to a power-up control node, and a current source connected to the power source and connected to an internal node. The current source has a control terminal connected to the power-up control node. The current source sets a state at the internal node according to a signal on the power-up control node. The power-up initialization circuit furthers includes a latch connected to the internal node and connected to a controlled node. The latch sets a state of the controlled node opposite the state of the internal node.

REFERENCES:
patent: 4484087 (1984-11-01), Mazin et al.
patent: 5111067 (1992-05-01), Wong et al.
patent: 5283792 (1994-02-01), Davies, Jr. et al.
patent: 5767709 (1996-01-01), McClure
patent: 5812463 (1997-08-01), Park
patent: 5828249 (1998-10-01), Sessions
patent: 5844515 (1997-01-01), Park

Affiliated with

Also associated with

Rating

Power-up initialization circuit that operates robustly over a wi does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Power-up initialization circuit that operates robustly over a wi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power-up initialization circuit that operates robustly over a wi will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1470527