Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2011-03-08
2011-03-08
Tra, Quan (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
07902912
ABSTRACT:
A bias current generator for generating bias current is described. The generator comprises an amplifier having an inverting input, a non-inverting input and an output. A first bipolar transistor is associated with one of the inverting and non-inverting inputs of the amplifier. A load MOS device is associated with the other one of the inverting and non-inverting inputs of the amplifier. The load MOS device is driven by the amplifier to operate in the triode region with a corresponding drain-source resistance ron. The first bipolar transistor and the load MOS device are arranged such that a voltage derived from the first bipolar transistor is developed across the drain-source resistance ronof the load MOS device thereby generating a bias current.
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Analog Devices Inc.
Knobbe Martens Olson and Bear LLP
Tra Quan
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