Miscellaneous active electrical nonlinear devices – circuits – and – Gating – Converging with plural inputs and single output
Patent
1993-11-08
1995-01-24
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Gating
Converging with plural inputs and single output
327407, H03K 1756
Patent
active
053845463
ABSTRACT:
An integrated circuit in which closer matching or tracking of critical components, both active and passive, is achieved by time domain multiplexing of these critical components. Time domain multiplexing means that each of the components to be matched is alternately and sequentially, electronically switched between selected positions in the circuit. This is accomplished by continuous electronic movement or rotation of the critical components into or out of selected circuit positions to average in the circuit output any inherent errors due to variations resulting from electrical and physical characteristics appearing in the components. This arrangement is particularly useful in compensating for variations induced by the process used to create the components. This time domain multiplexing is especially useful in analog circuits employing complementary metal on silicon (CMOS) transistors, both field effect and bipolar in which component tracking is required for quality operation.
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Callahan Timothy P.
International Business Machine Corp.
Thornton Francis J.
Tran Toan
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