Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Reexamination Certificate
2006-06-13
2006-06-13
Cunningham, Terry D. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
C327S538000
Reexamination Certificate
active
07061308
ABSTRACT:
A voltage divider for integrated circuits that does not include the use of resistors. In one embodiment, voltage node VDD is connected with two n-type transistors, NFET1and NFET2, which are connected in series. NFET1includes a source (12), a drain (14), a gate electrode (16) having a gate area A1(not shown), and a p-substrate (18). NFET2includes a source (20), a drain (22), a gate electrode (24) having a gate area A2(not shown), and a p-substrate (26). Source (12) and drain (14) of NFET1are coupled with gate electrode (24) of NFET2. The voltage difference between NFET1and NFET2has a linear function with VDD. As a result, voltage VDD may be divided between NFET1and NFET2by properly choosing the ratio between each of the respective transistor gate electrode areas, (A1) and (A2).
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A Low Cost Voltage Controlled Amplifier; Mr. P.V. Wilson, Electronics Australia, vol. 43, No. 1, Jan., 1981; pp. 1 and 73.
Abadeer Wagdi W.
Fifield John A.
Tonti William R.
Cunningham Terry D.
Downs Rachlin & Martin PLLC
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