Patent ID: 6822597
Filing Date: 2004-11-23
Classification: H03M

Abstract:
A comparator circuit that maps an analog input signal into a digital output signal, comprising:a threshold value; an upper hysteresis threshold value; a lower hysteresis threshold value; an analog signal input; output logic comprising at least one unlatch signal input and a digital signal output; and processing logic configured to hold the threshold value, the upper hysteresis threshold value, the lower hysteresis threshold value and connected to the analog signal input, the processing logic being further configured to provide the at least one unlatch signal input to the output logic such that given a transgression of the upper or lower hysteresis threshold value by the analog input signal, the at least one unlatch signal is formed that enables the switching of the digital output signal when the analog input signal upwardly or downwardly transgresses the threshold value, wherein, independently of the at least one unlatch signal, the digital output signal is switched when the analog input signal transgresses the upper or lower hysteresis threshold value from between the upper and lower hysteresis threshold value, if it was not switched at the threshold value.