Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2006-09-19
2006-09-19
Han, Jessica (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
C323S280000, C323S907000, C327S513000, C327S539000, C330S009000
Reexamination Certificate
active
07109697
ABSTRACT:
An operational amplifier having temperature-compensated offset correction. The amplifier includes an operational amplifier circuit, that has a first input field effect transistor (FET) having a gate connected to receive a first input signal, and a second input FET having a gate connected to receive a second input signal, the first and the second input FETs being connected together to receive a first bias current, and also being connected to respective sides of a first current mirror. A correction amplifier circuit is also provided, that has a first correction FET having a gate, and a second correction FET having a gate, the first and the second correction FETs being connected together to receive a second bias current, and also being connected to respective sides of a second current mirror. A resistor is arranged to have a fixed voltage provided across it, one terminal of the resistor being connected to the gate of the first correction FET and the other terminal of the resistor being connected to the gate of the second correction FET. A first bias FET is connected to conduct an “extra” current from the second correction FET that is blocked by the current mirror action from flowing through the second current mirror. A second bias FET is connected in current mirror configuration with the first bias FET to form a third current mirror, and is configured to mirror and scale the current through the first bias FET to a selected one of the first input FET and the second input FET.
REFERENCES:
patent: 5386160 (1995-01-01), Archer et al.
patent: 6002276 (1999-12-01), Wu
patent: 6194962 (2001-02-01), Chen
patent: 6396339 (2002-05-01), Jacobs
Atrash Amer Hani
Chellamuthu Shanmuganand
Brady W. James
Han Jessica
Moore J. Dennis
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
LandOfFree
Temperature-independent amplifier offset trim 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 Temperature-independent amplifier offset trim circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Temperature-independent amplifier offset trim circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3600346