Patent ID: 9729132
Date: 2017-08-08
CPC Classifications: G01R,H03G,H03K

Claim:
1. A squelch detector, comprising: an input configured to receive an input signal; a peak detector connected to the input configured to detect a maximum value of the input signal wherein the peak detector includes a refresh input configured to receive a refresh signal to refresh an output of the peak detector; a valley detector connected to the input configured to detect a minimum value of the input signal wherein the valley detector includes a refresh input configured to receive the refresh signal to refresh an output of the valley detector; a comparator including a first input connected to the output of the peak detector, a second input connected to the output of the valley detector, and a first reference input, wherein the comparator is configured to compare a difference between the output of the peak detector and the output of the valley detector and a reference value received at the first reference input and configured to produce an output based upon the comparison; wherein the comparator further comprises a second reference input; and wherein the comparator is configured to compare the difference between the output of the peak detector and the output of the valley detector and a difference between the reference value received at the first reference input and a reference value received at the second input.