Constant current circuit

Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage

Reexamination Certificate

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

C323S313000

Reexamination Certificate

active

07609106

ABSTRACT:
A constant current circuit includes a first current mirror composed of a first transistor formed on a first current path and a second transistor formed on a second current path, a second current mirror composed of a third transistor formed on the first current path and a fourth transistor formed on the second current path, a first diode formed on the first current path, a second diode formed on the second current path, a resistor formed on the second current path, a variable resistance element connected with the first current path and with the second current path, and a feedback unit to control a resistance value of the variable resistance element based on a current flowing through the second current path.

REFERENCES:
patent: 4942369 (1990-07-01), Nakagawara et al.
patent: 5880582 (1999-03-01), Sawada
patent: 6087820 (2000-07-01), Houghton et al.
patent: 6448811 (2002-09-01), Narendra et al.
patent: 6501299 (2002-12-01), Kim et al.
patent: 6768139 (2004-07-01), Fischer et al.
patent: 7276890 (2007-10-01), Kumar
patent: 2002/0125938 (2002-09-01), Kim et al.
patent: 2003/0102901 (2003-06-01), Ooishi
patent: 2003/0132796 (2003-07-01), Gailhard et al.
patent: 2004/0150381 (2004-08-01), Butler
patent: 0 651 311 (1995-05-01), None
patent: 4-170609 (1992-06-01), None
patent: 8-63245 (1996-03-01), None
patent: 8-228114 (1996-09-01), None
patent: 2000-330658 (2000-11-01), None
patent: 2005-228160 (2005-08-01), None
European Search Report dated Oct. 5, 2007.
Korean Office Action dated Feb. 27, 2009 with partial English-Language Translation.

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

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

Rate now

     

Profile ID: LFUS-PAI-O-4094301

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