Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1998-10-30
2000-10-31
Cunningham, Terry D.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327534, H03B 100, H03K 300
Patent
active
061408468
ABSTRACT:
A driver circuit has an input terminal at which a first signal having a first voltage swing is applied, and an output terminal at which: (i) a second signal having a second voltage swing is provided to external circuitry, and (ii) a third signal having a third voltage swing is received from the external circuitry. A level shifter circuit is coupled to the input terminal and translates the first signal to the second signal. The level shifter circuit includes circuitry which regulates the switching rate of the driver circuit. An output circuit is coupled between the level shifter circuit and the output terminal which drives the external circuitry with the second signal received from the level shifter circuit. The output circuit has a floating well, and a bias circuit is coupled between the output terminal and the well of the output circuit. The bias circuit biases the well proportional to the third voltage swing when the third signal is received at the output terminal. A feedback circuit is coupled between the output terminal and the output circuit. The feedback circuit deactivates at least a portion of the output circuit responsive to the third signal being received at the output terminal.
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Chan Francis
Koch Steven P.
Stout Douglas W.
Cunningham Terry D.
International Business Machines - Corporation
Shkurko Eugene I.
Tra Quan
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