Technique to detect drive strength of input pin

Details Technique to detect drive strength of input pin Technique to detect drive strength of input pin

1998-05-29

2000-10-17

Nguyen, Hoa

Error detection/correction and fault detection/recovery

Pulse or data error handling

Digital logic testing

G01R 3128

Patent

active

061346861

ABSTRACT:
A method and apparatus comprising (i) a first circuit that may be configured to generate a first and second pulse in response to a reset signal, (ii) a latch circuit that may be configured to generate a first and second latch output in response to (a) the first and second pulses, (b) the reset signal and (c) an input signal and (iii) a third circuit that may be configured to generate a detect output in response to the first and second latch outputs. The detect output may be implemented as a trigger signal having an enabled state indicating a floating voltage is present on the input signal. The first and second latch outputs may be used to indicate the drive strength of the input signal. The enabled state of the detect output may have a floating state other than a standard logic "1" or logic "0".

REFERENCES:
patent: 5077521 (1991-12-01), Langford, II et al.
patent: 5198707 (1993-03-01), Nicolai
patent: 5491794 (1996-02-01), Wu
patent: 5942925 (1999-08-01), Stahl

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