Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1996-07-31
1998-12-08
Tran, Toan
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 74, H03K 522
Patent
active
058475842
ABSTRACT:
A threshold detecting device including a detecting stage having a first input supplied with a monitored voltage varying between a first and second value, a second input supplied with a reference voltage by a reference source stage, and an output supplying a logic signal indicating crossover of a predetermined threshold by the monitored voltage. Initially, the reference source stage is off and the reference voltage follows the course of the monitored voltage; upon the monitored voltage exceeding a first threshold value, the reference source is turned on and causes the reference voltage to rise more slowly than the monitored voltage, so that an increasing voltage difference is present between the first and second inputs of the reference stage; and, upon the voltage difference exceeding a second threshold value, the detecting stage switches and generates the threshold crossover signal.
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SGS-Thomson Microelectronics S.r.1.
Tran Toan
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