Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2006-09-26
2006-09-26
Nguyen, Matthew V. (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
C323S317000, C327S538000
Reexamination Certificate
active
07112948
ABSTRACT:
A voltage source includes first and second pn junctions which conduct the outputs of respective current sources to establish respective base-emitter voltages Vbe1and Vbe2at respective nodes; Vbe1and Vbe2can each be generated with a current I or a current N*I. An amplifier A1has its non-inverting input connected to the second node and its inverting input connected to the first node through an input capacitor; a feedback capacitor is connected between the inverting input and a third node. Switches are connected between A1's inverting input and A1's output, between the third node and A1's output, and between the third node and a circuit common point. A control circuit operates the switches and current sources during first and second operating phases to selectively produce a temperature independent output voltage or a temperature dependent output voltage.
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Brokaw A. Paul
Daly Michael P.
Miranda Evaldo M.
Thomson David
Analog Devices Inc.
Koppel, Jacobs Patrick & Heybl
Nguyen Matthew V.
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