Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Particular stable state circuit
Reexamination Certificate
2006-06-20
2006-06-20
Callahan, Timothy P. (Department: 2816)
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Particular stable state circuit
C327S199000, C327S332000
Reexamination Certificate
active
07064593
ABSTRACT:
A bus hold circuit that satisfies both the over-voltage tolerance and maximum leakage current ‘Ioff’ specification without incorporating a diode in pull-up path of a bus-hold circuit is disclosed herein. Specifically, the bus-hold circuit includes a first subcircuit portion operable to provide the bus-hold feature of the circuit connected to a second subcircuit portion. The second sub-circuit portion provides the over-voltage tolerance feature and minimizes the leakage current in the bus-hold circuit. The bus-hold circuit in accordance with the present invention is enhances the performance of the bus-hold current by eliminating the voltage drop across the diodes customarily included within known bus-hold circuit designs. Thereby, this implementation eliminates the negative diode effect on the minimum high sustaining bus-hold current (IBHH) at low supply voltages due to the voltage drop across the diode.
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Curtis Susan A.
Hinterscher Gene B.
Brady III W. James
Callahan Timothy P.
Moore J. Dennis
Nguyen Hai L
Telecky , Jr. Frederick J.
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