Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Patent
1997-09-03
1999-03-09
Nguyen, Matthew
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
327 53, G05F 316
Patent
active
058805826
ABSTRACT:
A plurality of n-channel FETs in predetermined combinations are grouped two by two into pairs, and their respective gates and sources are connected to each other in a crossing manner, thus forming a first current mirror circuit connected to a higher-potential side power supply. A second current mirror circuit constituted by another plurality of n-channel FETs, diodes, and a variable resistor, which is connected to a lower-potential side power supply, is connected to the first current mirror circuit connected to the higher-potential side power supply, thereby forming a reference voltage generating circuit which generates a constant voltage. Further, three other pieces of n-channel FETs biased by this constant voltage, a diode, and the like constitute a light emitting element driving circuit for driving a light emitting element.
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Nguyen Matthew
Sumitomo Electric Industries Ltd.
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