Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-10-31
2010-11-30
Donovan, Lincoln (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C323S314000
Reexamination Certificate
active
07843254
ABSTRACT:
Generating a bandgap reference by generating a first current in a first circuit and a second current in a second circuit, a control circuit forcing the first and second currents to have a first magnitude proportional-to-temperature. Generating a third current in a third circuit having a second magnitude based on a first voltage associated with the first circuit, the second magnitude being complementary-to-temperature. Adding the first and second magnitudes in a fourth circuit to form a third magnitude substantially constant over change in temperature, the fourth circuit generating a fourth current having the third magnitude. Adding the first and second magnitudes to generate a fifth current having the first magnitude in a fifth circuit and a sixth current having the second magnitude in a sixth circuit, the fifth and sixth circuits sinking current from the fourth circuit.
REFERENCES:
patent: 6815941 (2004-11-01), Butler
patent: 7227401 (2007-06-01), Zhang et al.
patent: 7253599 (2007-08-01), Chen et al.
patent: 7323857 (2008-01-01), Sung et al.
patent: 7495505 (2009-02-01), Chang et al.
patent: 7535285 (2009-05-01), Colman
Rincón-Mora, G.A. “Bandgap Voltage Reference” ECE4430 Analog Integrated Circuits, 14 pages (metadata indicates document created on Dec. 2, 2002).
“Introduction to Bandgap Reference Generators,” Texas A&M University, 607(ESS), 18 pages (metadata indicates document created on Feb. 10, 2005).
Brady III Wade J.
Donovan Lincoln
Englund Terry L
Kempler William B.
Telecky , Jr. Frederick J.
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