DocumentCode :
1195834
Title :
Comments on "Accurate Determination of Threshold Voltage levels of a Schmitt Trigger
Author :
Lauer, Hans-Ulrich
Volume :
34
Issue :
10
fYear :
1987
fDate :
10/1/1987 12:00:00 AM
Firstpage :
1252
Lastpage :
1253
Abstract :
It is shown that for an accurate determination of the two threshold voltages of a Schmitt trigger, the influence of the forward current amplification 
and the internal ohmic base and emitter resistors 
and 
of the transistors 
and 
may not be neglected. The hysteresis width of a real Schmitt trigger is smaller than calculated with the formula of Roy [1], because neither is infinite nor and are zero. A very accurate but simple formula for the threshold voltages is given, using an analysis similar to that of Roy.
and the internal ohmic base and emitter resistors and of the transistors and may not be neglected. The hysteresis width of a real Schmitt trigger is smaller than calculated with the formula of Roy [1], because neither is infinite nor and are zero. A very accurate but simple formula for the threshold voltages is given, using an analysis similar to that of Roy.Keywords :
Trigger circuits; Circuit stability; Circuits and systems; Digital filters; Hysteresis; Resistors; Testing; Threshold voltage; Trigger circuits;
fLanguage :
English
Journal_Title :
Circuits and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0098-4094
Type :
jour
DOI :
10.1109/TCS.1987.1086044
Filename :
1086044
Link To Document :
