Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1994-01-31
1995-10-17
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327540, 327542, 327543, 327546, G05F 302
Patent
active
054594308
ABSTRACT:
A wideband current multiplying divider circuit that produces an output current of any ratio to the input current has a first bipolar transistor and a first reference current source connected in series between a supply voltage and ground. A second bipolar transistor and a second reference current source are also connected in series between the supply voltage and around. A summation current source is connected at one side to ground and at the other side to a divided current path. A first resistor is connected in series with the station current source between a base of the first bipolar transistor and ground, and through which an input current can be connected to flow. A second resistor is connected in series with the summation current source between a base of the second bipolar transistor and ground, and through which an output current can be connected to flow. The ratio of the input to output currents is determined by the ratio of the first and second resistors, wherein the output current can be a multiplied or divided value of the input current. The first and second bipolar transistors are NPN transistors, and the first and second reference current sources source substantially equal reference currents. The circuit may further include a cascode circuit connected to substantially remove any Early effect error between the first and second bipolar transistors.
REFERENCES:
patent: 3651346 (1972-03-01), Limberg
patent: 4055774 (1977-10-01), Ahmed
patent: 4443753 (1984-04-01), McGlinchey
patent: 4593208 (1986-06-01), Single
patent: 4675594 (1987-06-01), Reinke
patent: 5008609 (1991-04-01), Fukiage
patent: 5350998 (1994-09-01), Marchio et al.
Anderson Rodney M.
Bachand Richard A.
Cunningham Terry D.
Jorgenson Lisa K.
SGS-Thomson Microelectronics Inc.
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