Miscellaneous active electrical nonlinear devices – circuits – and – Specific signal discriminating without subsequent control – By amplitude
Patent
1996-06-13
1998-01-06
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Specific signal discriminating without subsequent control
By amplitude
327 71, 327 76, 327 78, H03K 524
Patent
active
057059446
ABSTRACT:
The present invention provides a method and apparatus for detecting voltage drops on an IC chip. The device operates by using a reference voltage to detect the voltage range of a local voltage. A multiple number of reference voltages are used (or predetermined) between the reference voltage and the ground voltage. The voltage drop detecting device includes a multiple number of inverters having to the local voltage as its input. The inverters each have a trigger voltage corresponding to one of the reference positions. When the local voltage is smaller than the trigger voltage of the inverter, a low to high voltage switching is present at the output. A multiple number of positive-edge triggering devices, coupled to the reference voltage as one of its inputs, are each coupled to one of the inverters. A corresponding inverter presents a low to high switching to make the reference voltage present at the corresponding output terminal. The voltage range of the local voltage is detected at the output terminals.
REFERENCES:
patent: 5406247 (1995-04-01), Nagaraj
patent: 5565801 (1996-10-01), Ernst
patent: 5652533 (1997-07-01), Wong et al.
Mou Ya-Nan
Pan Chien-Chung
Callahan Timothy P.
Lam T. T.
United Microelectronics Corp.
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