Patent ID: 6768951
Filing Date: 2004-07-27
Classification: G01R

Abstract:
An apparatus for measuring a parameter in a host device; the apparatus receiving an indicating signal from said host device at a signal monitoring locus; said indicating signal being representative of said parameter; the apparatus comprising:(a) a first signal measuring unit having a first input locus and a first output locus; said first input locus being selectively coupled with said monitoring locus; said first signal measuring unit selectively receiving said indicating signal at said first input locus and presenting a first output signal at said first output locus; said first output signal including a first monitoring signal and a first benchmark signal; said first monitoring signal representing change in said indicating signal during a first time interval; said first benchmark signal indicating change imparted to signals by said first signal measuring unit when traversing said first signal measuring unit during a second time interval; (b) a second signal measuring unit having a second input locus and a second output locus; said second input locus being selectively coupled with said monitoring locus; said second signal measuring unit selectively receiving said indicating signal at said second input locus and presenting a second output signal at said second output locus; said second output signal including a second monitoring signal and a second benchmark signal; said second monitoring signal representing change in said indicating signal during said second time interval; said second benchmark signal indicating change imparted to signals by said second signal measuring unit when traversing said second signal measuring unit during said first time interval; (c) an accumulating unit coupled with said first output locus and said second output locus; said accumulating unit receiving said first output signal and said second output signal; said accumulating unit evaluating said first output signal and said second output signal and generating at least one accumulated indicator signal at at least one accumulated indicator output locus; said at least one accumulat d indicator signal representing said evaluating; and (d) an indicator unit coupled with said at least one accumulated indicator output locus; said indicator unit rec iving said at least one accumulated indicator signal and presenting an indication relating to excursion of said indicating signal.