Schmitt2 component output stays high

Tech Note: TN0913
Product: RPvdsEx
Version: All
Date Added: 2013-01-17

Issue

The minimum allowed value of the Schmitt2 component's nHi input is 1. However, using a parameter tag or signal line, the value of nHi can be forced to 0. If the Schmitt2 is triggered while nHi is 0, the output will go high and stay high until the circuit is restarted.

Solution

Do not set nHi to 0; this will not disable output of the Schmitt2. If you wish to disable output of the Schmitt2, set the Schmitt2 component's nEnab input low.