Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Current driver
Patent
1998-09-03
2000-05-30
Wells, Kenneth B.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Current driver
327112, 327170, 327436, H03K 500
Patent
active
060695048
ABSTRACT:
An output driver circuit offers control and logic level adjustment for high speed data communications in a synchronous memory such as a synchronous dynamic random access memory (SDRAM). Level adjustment is obtained by resistive division between a termination resistor and controllable impedances between an output node and VDD and VSS power supplies. Control functions include slew rate modification of the signal at the output node, by sequentially turning on or off output transistors in response to a transition in an input signal. Different schemes of weighting the output transistors obtains different characteristics of the output signal. Load matching circuitry and voltage level forcing circuitry is described for improving high frequency operation.
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Micron Technnology, Inc.
Wells Kenneth B.
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