Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Patent
1995-08-31
1997-12-09
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
327142, 327198, H03L 700
Patent
active
056964617
ABSTRACT:
A threshold detection circuit for generating a detection signal when a power supply voltage exceeds a predetermined threshold. The threshold detection circuit comprises a first detection stage, a second detection stage, and a control circuitry. The first detection stage is connected between the power supply voltage and a reference voltage, and includes a first pull-up device and a first switching device connected in series and provides a control node therebetween. The second detection stage is connected between the power supply voltage and the reference voltage and includes a controllable pull down device and a second switching device connected in series, and provides an output node therebetween. The controllable pull down device has a control terminal coupled to the control node. Finally, the control circuitry controls the first and second switching devices to prevent a DC path between the power supply voltage and the reference voltage outside an operational voltage range of the threshold detection circuit.
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Piasecki, Statutory invention registration, No. H497, Jul. 1988.
Callahan Timothy P.
Carlson David V.
Kim Jung Ho
SGS--Thomson Microelectronics S.r.l.
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