Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2005-01-18
2005-01-18
Zweizig, Jeffrey (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
Reexamination Certificate
active
06844774
ABSTRACT:
Apparatus for providing well-matched source and sink currents includes a number of parallel current paths, a first of which drives a first current mirror to mirror current to second and third of the current paths. The second current path provides well-matched source and sink currents as outputs, and the third current path is matched to the second. The fourth and fifth current paths each comprise a transistor of a current steering mechanism and a bias transistor. Using a reference voltage, and feedback from the circuit, the fourth and fifth current paths steer current between the first, second and third current paths. A second current mirror is driven by a bias current to mirror the bias current to each of the number of parallel current paths. Other methods and apparatus are also disclosed.
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Agilent Technologie,s Inc.
Zweizig Jeffrey
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