Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Converging with plural inputs and single output
Patent
1996-11-18
1998-07-21
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Converging with plural inputs and single output
327 70, 327 99, 327143, H03K 1762
Patent
active
057839646
ABSTRACT:
A switching circuit for switching between a main power supply and a battery power supply only after first power up includes a switch, a first power up transfer transistor and a first power up latch. The switch switches between the main and battery power supplies and provides one of the main and battery power supplies to a switched power supply node. The first power-up transfer transistor is connected on input to the switched power supply node. The first power up latch is powered by a switched power supply from the switched power supply node and is connected on output to a gate of the first power-up transfer transistor. The first power up latch produces an activation signal to the gate upon and after first power up of the main power supply.
REFERENCES:
patent: 4617473 (1986-10-01), Bingham
patent: 4654829 (1987-03-01), Jiang et al.
patent: 4730121 (1988-03-01), Lee et al.
patent: 4908790 (1990-03-01), Little et al.
patent: 5237699 (1993-08-01), Little et al.
patent: 5272393 (1993-12-01), Horiguchi et al.
patent: 5315549 (1994-05-01), Scherpenberg et al.
patent: 5557229 (1996-09-01), Eitan
Callahan Timothy P.
Waferscale Integration Inc.
Zweizig Jeffrey
LandOfFree
Backup battery switch with first power up control does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Backup battery switch with first power up control, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Backup battery switch with first power up control will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1650033