Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Amplitude control
Patent
1994-07-21
1996-04-16
Cunningham, Terry
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Amplitude control
327 78, 327143, 361 56, H02H 904
Patent
active
055086497
ABSTRACT:
A voltage level triggered ESD protection circuit is immune to standard signal transitions up to approximately 5.5 volts, does not consume any DC current either in the powered up or powered down states, and is interfaceable to a live bus when the system it is connected to is powered down. The trigger circuit is reliably immune to tripping from applied fast bus transitions on a powered-down integrated circuit. The trigger signal is generated in response to sensing both a voltage transition and to reaching a voltage set point such as 7 volts, rather than merely triggering off the voltage transition.
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United States SIR, Piasecki, Registration No. H497, Published Jul. 5, 1988.
Cunningham Terry
Englund Terry L.
Klivans Norman R.
National Semiconductor Corporation
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