Power supply switching circuit

Details Power supply switching circuit Power supply switching circuit

2008-12-04

2010-11-02

Tran, Michael T (Department: 2827)

Static information storage and retrieval

Powering

C365S185240

Reexamination Certificate

active

07826297

ABSTRACT:
In a power supply switching circuit, a transistor that switches to a highest voltage is formed of an enhancement type PMOS transistor, and transistors that switch other voltages are each formed of a depletion type NMOS transistor. A signal for controlling a gate of each of the transistors is input through a level shifter. The depletion type NMOS transistor does not operate in a bipolar manner even if a source voltage thereof reaches a power supply voltage VPP1or VPP2, and the enhancement type PMOS transistor does not operate in the bipolar manner even if a gate voltage and a source voltage thereof reach the power supply voltage VPP1, and a drain voltage thereof reaches the power supply voltage VPP2. Accordingly, there can be provided the power supply voltage switching circuit that is high in efficiency.

REFERENCES:
patent: 6205054 (2001-03-01), Inami
patent: 6215352 (2001-04-01), Sudo
patent: 6229734 (2001-05-01), Watanabe
patent: 6335878 (2002-01-01), Yamada et al.
patent: 6-290593 (1994-10-01), None

Affiliated with

Also associated with

Rating

Power supply switching circuit 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 supply switching circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Power supply switching circuit will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-4150941