Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1999-05-21
2000-11-21
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327540, G05F 110, G05F 302
Patent
active
061508713
ABSTRACT:
A voltage reference circuit includes a first transistor and a second transistor having their control terminals connected together, a first resistor coupled to a first current handling terminal of the first transistor, a second resistor coupled between an output node and a second current handling terminal of the second transistor, and a current mirror. The reference circuit provides an output voltage that is independent of variations in the supply voltage by adjusting the resistance of the first resistor in response to changes in the supply voltage. In one embodiment, the voltage at the control terminals of the first and second transistors is kept constant despite variations in the supply voltage. A first current and a second current flowing through the first and second transistors are also kept constant.
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Cook Carmen C.
Cunningham Terry D.
Micrel Incorporated
Ogonowsky Brian D.
Tra Quan
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