Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-06-12
2007-06-12
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
C327S512000
Reexamination Certificate
active
11248892
ABSTRACT:
A circuit for creating a current complementary to absolute temperature comprises a first transistor and a second transistor. A resistor for generating a current complementary to absolute temperature has a first node coupled to the emitter of the first transistor and a second node coupled to the base of the first transistor. A first current mirror is coupled between the second node of the resistor and the emitter of the second transistor, the second transistor being used for replicating bias conditions of the first transistor. A second current mirror is coupled between the base of the first transistor and the base of the second transistor, and the second current mirror is used for canceling a base current of the first transistor.
REFERENCES:
patent: 5686858 (1997-11-01), Malherbe
patent: 7057442 (2006-06-01), Hwang et al.
Aslan Mehmet
Scheuerlein Eric
National Semiconductor Corporation
Zweizig Jeffrey
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