Patent ID: 7417576
Filing Date: 2008-08-26
Classification: H03K,H03M

Abstract:
1. A detector comprising: an analog-to-digital converter comprising an input for an analog receive signal and an output for a digital signal; and an edge detector comprising an input operably connected to receive the digital signal and configured to generate edge detection information at an interface, wherein the edge detection information indicates the presence of an edge if the digital signal indicates a change which is larger than or equal to a change threshold value; wherein the digital signal provided by the analog-to-digital converter comprises count-up/count-down information; wherein the count-up/count-down information indicates a count-up condition if the analog receive signal processed in a current time interval lies within a higher analog-to-digital converter interval when compared to an analog receive signal processed in a previous time interval; wherein the count-up/count-down information indicates a count-down condition if the analog receive signal processed in a current time interval lies within a lower analog-to-digital converter interval when compared to an analog receive signal processed in a previous time interval; wherein the edge detector comprises a counter, the counter comprising a count-up/count-down input coupled with the output of the analog-to-digital converter to receive the count-up/count-down information; wherein the edge detection information indicates the presence of an edge, when the counter value reaches or exceeds a threshold value, wherein the counter comprises a reset input for a reset signal; and wherein the reset signal is active when an edge is detected.