Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1997-12-15
1999-08-31
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, 327543, 323313, 323315, G05F 110
Patent
active
059458739
ABSTRACT:
A current mirror circuit is provided including a first and second transistors of a first conductivity type, the first transistor having a base connected to a base of the second transistor forming a base junction. A third transistor which is of a second conductivity type is connected in series with the first transistor and a collector of the third transistor is connected to the base junction of the first and second transistors. A fourth transistor which is of the second conductivity type is connected in series with the second transistor and has a base connected to a base of the third transistor forming a base junction. A collector of the second transistor is connected to the base junction of the third and fourth transistors. A first resistor is connected between an emitter of the third transistor and ground and a second resistor is connected between an emitter of the fourth transistor and ground. The circuit provides current matching over the first and second resistors where such resistors have about the same resistance values.
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Antone James A.
Love William J.
Caterpillar Inc.
Cunningham Terry D.
Nieberding Michael J.
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