Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-02-06
2007-02-06
Berhane, Adolf (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
Reexamination Certificate
active
10881300
ABSTRACT:
A voltage circuit including a first amplifier having first and second inputs and having an output driving a current mirror circuit is provided. Outputs from the current mirror circuit drive first and second transistors which are coupled to the first and second input of the amplifier respectively. The base of the first transistor is coupled to the second input of the amplifier and the collector of the first transistor is coupled to the first input of the amplifier such that the amplifier keeps the base and collector of the first transistor at the same potential. The first and second transistors are adapted to operate at different current densities such that a difference in base emitter voltages between the first and second transistors may be generated across a resistive load coupled to the second transistor, the difference in base emitter voltages being a PTAT voltage.
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Gray, Paul R., et al,Analysis And Design Of Analog Integrated Circuits,Chapter 4, 4th ed., John Wiley & Sons, Inc., 2001, pp. 253-327.
Analog Devices Inc.
Berhane Adolf
Wolf Greenfield & Sacks P.C.
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