Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1996-01-25
1998-04-07
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327108, 326 81, H03L 500
Patent
active
057368872
ABSTRACT:
A low voltage driver tolerant of high voltage and suitable for driving a processor and a memory device. A first protection NFET is coupled to the drains of a series-coupled PFET and NFET forming the basic driver components. Another protection NFET is connected in series to the first NFET. This second protection NFET requires approximately 1 volt for turn on, such that a resultant 3 volts appear at the output of the complete driver assembly. When the output driver is not enabled and 5 volt inputs are being applied from the memory circuit, the two NFET protection transistors block the 5 volts from reaching the processor output driver.
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Sedra & Smith, "Microelectronic Circuits", Saunders College Publishing, Philadenphia 1991, pp. 315, 316,381 & 382.
Callahan Timothy P.
Cray William C
Oh Susie H.
Rockwell International Corporation
Zweizig Jeffrey
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