Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-07-10
2007-07-10
Callahan, Timothy R (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C323S315000
Reexamination Certificate
active
10514243
ABSTRACT:
A reference circuit comprising first and second field effect transistors connected to form a first current mirror, and third and fourth field effect transistors connected to form a second current mirror, wherein a property of the first transistor is mismatched relative to the second transistor such that the threshold voltage of the first transistor is significantly higher than the threshold voltage of the second transistor, and the drain current versus gate-source voltage responses of the first and second transistors have substantially different gradients for current levels at which the reference circuit is operated.
REFERENCES:
patent: 4300091 (1981-11-01), Schade et al.
patent: 4777019 (1988-10-01), Dandekar
patent: 5103159 (1992-04-01), Breugnot et al.
patent: 5466348 (1995-11-01), Holm-Kennedy
patent: 5632957 (1997-05-01), Heller et al.
patent: 5635869 (1997-06-01), Ferraiolo et al.
patent: 5644216 (1997-07-01), Lopez et al.
patent: 5793248 (1998-08-01), Lee et al.
patent: 5827482 (1998-10-01), Shieh et al.
patent: 5939933 (1999-08-01), Wang
patent: 6015714 (2000-01-01), Baldarelli et al.
patent: 6060327 (2000-05-01), Keen
patent: 6096610 (2000-08-01), Alavi et al.
patent: 6333662 (2001-12-01), Umezawa et al.
patent: 6413792 (2002-07-01), Sauer et al.
patent: 6953958 (2005-10-01), Baxter et al.
patent: 2001/0020844 (2001-09-01), Andoh et al.
patent: 2003/0186262 (2003-10-01), Cailloux
patent: 2004/0262636 (2004-12-01), Yang et al.
patent: 2005/0032075 (2005-02-01), Yaku et al.
patent: 2005/0062093 (2005-03-01), Sawada et al.
patent: 0 483 537 (1991-10-01), None
patent: 0 992 871 (2000-04-01), None
patent: 2 732 129 (1995-03-01), None
Sakurai and Husimi, “Real-Time Monitoring of DNA Polymerase Reactions by a Micro ISFET pH Sensor,” Anal. Chem, 64, pp. 1996-1997 (1992).
Georgiou Julius
Toumazou Christofer
Callahan Timothy R
DNA Electronics Limited
Englund Terry L.
Synnestvedt & Lechner LLP
LandOfFree
Reference 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 Reference circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Reference circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3729206