Patent ID: 8625725
Filing Date: 2014-01-07
Classification: H04L

Abstract:
1. A circuit comprising: comparator circuitry operable to compare a filtered input signal to a first or second hysteresis threshold value and output a hysteresis signal having a first state if said filtered signal is less than or equal to said first hysteresis threshold value and having a second state if said filtered signal is greater than or equal to said second hysteresis threshold value; circuitry operable to detect a low transient voltage of an unfiltered input signal, wherein said low transient voltage would produce an effective glitch lasting for a first length of time on said hysteresis signal; voltage-adjusting circuitry operable, in response to the detection of said low transient voltage, to adjust a voltage of said filtered signal to shorten said effective glitch to a second length of time less than said first length of time; and deglitcher circuitry operable to detect and remove said shortened effective glitch from said hysteresis signal and generate an output signal.