Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-05-22
1997-03-04
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327545, G05F 302
Patent
active
056083483
ABSTRACT:
A programmable current mirror circuit suitable for incorporation into circuit designs and programmably tailored to produce a ratio of current output over current input based upon the status of a plurality of binary weighted switches. The resulting circuit is readily tailored so as to be insensitive to the "on" characteristics of the switches. Alternatively, the switches may comprise transistors controlled by accompanying circuitry operable to produce an equivalent switching function. An input current divider circuit network formed from an array of current mirrors fractionally divides an input current into a plurality of equivalent currents. A binary weighting circuit receives such fractional input currents, and applies a binary weight to each of same. A voltage to current converter receives the binary weighted voltage and converts the voltage to a weighted output current proportional to the input current directly in relation to the binary weighting applied via the binary weighting circuit.
REFERENCES:
patent: 4103219 (1978-07-01), Wheatley, Jr.
patent: 4118699 (1978-10-01), Comer
patent: 4361816 (1982-11-01), Schade, Jr.
patent: 4608530 (1986-08-01), Bacrania
patent: 5111204 (1992-05-01), Katzenstein
patent: 5432389 (1995-07-01), Bader et al.
Kearney Mark B.
Osborn Douglas B.
Cunningham Terry
Delco Electronics Corporation
Funke Jimmy L.
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