the circuit begins to oscillate again and the Schmitt trigger returns the sensor to its previous output. If the sensor has a normally open configuration, its output is an “on” signal when the ...

Figure 1 Use a portion of a programmable-logic device or gate array to implement a Schmitt-trigger buffer (a) by adding either two (b) or four external resistors (c). Thanks to its internal hysteresis ...

A single-supply, inverting Schmitt trigger was detailed in a previous Idea For Design (“Comparator Features Symmetrical Thresholds,” by Samuel Kerem, Electronic Design, March 6, p. 124).

(For a sampling of approaches, see references 1 through 10.) The usual hardware approach to eliminating contact bounce comprises an RC filter followed by a Schmitt trigger (Figure 1). You can extend ...