Browse Prior Art Database

Edge-Detection Circuit

IP.com Disclosure Number: IPCOM000060220D
Original Publication Date: 1986-Mar-01
Included in the Prior Art Database: 2005-Mar-08

Publishing Venue

IBM

Related People

Authors:
Marple, WP Miller, HA [+details]

Abstract

Edge-detection circuits serve to identify the rising edge or falling edge on the input waveform. Problems have arisen in the prior art with regard to input noise which can occasionally rise above the threshold for detection of the edge-detected waveform. A solution to this problem is provided by the invention disclosed herein, by allowing the following voltage of the edge-detected to be of lesser magnitude than the rising voltage of the edge-detected signal. This can be seen with reference to waveforms B and C. Waveform B is the edge-detected signal in its uncorrected state, wherein a positive threshold and a negative threshold for detection of the edge- detected signal is provided.