Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2007-05-15
2007-05-15
Wells, Kenneth B. (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
11062888
ABSTRACT:
The present invention relates to a device for generation of a reference electrical voltage. The device includes a first current generator outputting a current proportional to temperature. The first current generator comprises at least one operational amplifier and two branches in parallel, a first branch comprising a first current source and a first bipolar transistor, and a second branch comprising a second current source, a first resistance and a second bipolar transistor. A second current generator outputs a current conversely proportional to temperature. The device includes means of summating the currents so as to obtain a voltage independent of the said temperature, and means of reducing dependence of the current circulating in the said first branch on the value of the said first resistance. The reduction means comprises at least one second resistance with a non-adjustable value.
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Bendraoui Abdellatif
Chatal Joel
Tual Mikael
Atmel Nantes SA
Wells Kenneth B.
Westman Champlin & Kelly
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