Miscellaneous active electrical nonlinear devices – circuits – and – Specific identifiable device – circuit – or system – With specific source of supply or bias voltage
Patent
1996-05-23
1999-01-05
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific identifiable device, circuit, or system
With specific source of supply or bias voltage
327538, 323315, G05F 110
Patent
active
058567550
ABSTRACT:
A bus termination voltage supply. The invented voltage supply provides an output voltage from an input voltage using biasing and isolation circuits. A voltage isolation circuit couples an input voltage node to an output node to provide the output voltage. The isolation circuit includes a transistor driver element which is coupled to the input voltage node and the output node. The voltage supply also includes a biasing circuit having a voltage divider and a bias transistor. The voltage divider has a first voltage divider element coupling the output node to a voltage divider node. The voltage divider has a second voltage divider element coupling the voltage divider node to a second voltage supply node. The bias transistor couples a control input of the transistor driver element to the second voltage supply node under the control of a bias transistor control input coupled to the voltage divider node. The voltage supply may further include a feedback circuit comprising bias resistor which couples the input voltage supply to the driver control input. This voltage supply may be used to provide a termination voltage for a signal line in a computer system.
REFERENCES:
patent: 3577167 (1971-05-01), Avins
patent: 4204133 (1980-05-01), Ahmed
patent: 4323794 (1982-04-01), Hoehn
patent: 4458201 (1984-07-01), Koen
patent: 4481463 (1984-11-01), Ferrieu
patent: 4691262 (1987-09-01), Chalfin
patent: 5015942 (1991-05-01), Kolanko
patent: 5451859 (1995-09-01), Ryat
patent: 5498952 (1996-03-01), Ryat
Falconer Maynard
Kim Songmin
Cunningham Terry D.
Draeger Jeffrey S.
Intel Corporation
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