Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2011-07-12
2011-07-12
Nguyen, Long (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S541000, C327S543000
Reexamination Certificate
active
07978005
ABSTRACT:
Embodiments of the invention describe a core circuit for a reference current generator circuit that biases a first transistor to source a first current and a second transistor parallel to the first transistor, biased to source a second current controlled by the first current. A third transistor is coupled parallel to the second transistor and sources a third current controlled by the first current. The third transistor has a different threshold voltage than a threshold voltage of the second transistor. A resistive component coupled to conduct the second current has a resistive voltage that is substantially equal to a voltage differential between the first transistor and the second transistor. The conducting current through the resistive component is substantially independent of temperature variations.
REFERENCES:
patent: 5910749 (1999-06-01), Kimura
patent: 6724243 (2004-04-01), La Rosa
patent: 2007/0057717 (2007-03-01), Choi
Diorio Christopher J.
Hyde John D.
Impinj, Inc.
Nguyen Long
Turk IP Law, LLC
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