Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2005-02-22
2005-02-22
Tra, Quan (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S543000
Reexamination Certificate
active
06859092
ABSTRACT:
A method and a low voltage, complementary metal oxide semiconductor (CMOS) circuit are provided for generating voltage and current references with a low voltage power supply. A voltage generating circuit provides a voltage reference and is formed by a plurality of CMOS transistors and a resistor. An operational amplifier includes a differential pair of CMOS transistors. The first voltage reference is applied to an input of the differential pair of transistors and an output of the differential pair of transistors providing a second voltage reference. The operational amplifier includes a plurality of current reference transistors. A first voltage generating circuit generates a first voltage and a second voltage generating circuit generating a second voltage. The first and second voltage generating circuits are formed by a plurality of CMOS transistors. The generated first and second voltages are applied to the voltage reference generating circuit and current reference transistors.
REFERENCES:
patent: 4825145 (1989-04-01), Tanaka et al.
patent: 5841271 (1998-11-01), Nakayama
patent: 6255807 (2001-07-01), Doorenbos et al.
patent: 6677802 (2004-01-01), Strom et al.
Lukes Eric John
Rosno Patrick Lee
Strom James David
Woeste Dana Marie
International Business Machines - Corporation
Pennington Joan
Tra Quan
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