Power supply voltage converting circuit, method for...

Computer graphics processing and selective visual display system – Display driving control circuitry – Display power source

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C345S210000, C345S204000

Reexamination Certificate

active

07821511

ABSTRACT:
A supply voltage conversion circuit allowing fabrication of a charge pump circuit having a large current capability with a small area is provided. In a charge pump DC-DC converter (10) for converting a supply voltage VDD1to a supply voltage VDD2, a level shifter (12) implements amplitude conversion to convert from a control pulse with amplitude of VSS-VDD1to a control pulse with amplitude of VSS-VDD2. By using the control pulse having the converted amplitude as a pumping pulse, a flying capacitor (C11) is charged/discharged by MOS transistors (Qp11), and (Qn11) of a charge pump circuit (11), and switching of MOS transistors (Qn12), and (Qp12) coupled to the output of the flying capacitor (C11) is controlled.

REFERENCES:
patent: 4807104 (1989-02-01), Floyd et al.
patent: 5870295 (1999-02-01), Watanabe
patent: 6160723 (2000-12-01), Liu
patent: 6177824 (2001-01-01), Amanai
patent: 6278625 (2001-08-01), Boyd
patent: 6304256 (2001-10-01), Nagaya
patent: 6421034 (2002-07-01), Mihara
patent: 6456344 (2002-09-01), Nemoto et al.
patent: 6509895 (2003-01-01), Yanagi et al.
patent: 6727681 (2004-04-01), Morita
patent: 7224336 (2007-05-01), Katsutani
patent: 2001/0020939 (2001-09-01), Ikeda
patent: 2002/0011883 (2002-01-01), Yamazaki et al.
patent: 2002/0018060 (2002-02-01), Yamazaki et al.
patent: 2002/0130704 (2002-09-01), Myono et al.
patent: 2003/0011586 (2003-01-01), Nakajima
patent: 2003/0067289 (2003-04-01), Morita
patent: 2003/0107356 (2003-06-01), Hachiya
patent: 1 233 504 (2002-08-01), None
patent: 1 304 791 (2003-04-01), None
patent: 64-40071 (1989-03-01), None
patent: 40071/1989 (1989-03-01), None
patent: 2001-245468 (2001-07-01), None
patent: 2001-245468 (2001-09-01), None
patent: 2002-175027 (2002-06-01), None
patent: 2002-233133 (2002-08-01), None
patent: 2002-233134 (2002-08-01), None
patent: 2003-102165 (2003-04-01), None

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

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

Rate now

     

Profile ID: LFUS-PAI-O-4168881

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.