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Schmitt Trigger Circuits
Last Updated on: Tuesday, April 01, 2014 04:29 AM


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:
Add a Schmitt-trigger function to CPLDs, FPGAs, and applications -  13-Oct-05 Issue of EDN  For slow-slewing signals, hysteresis solves trigger problem.... [Design Idea by Stephan Roche, Santa Rosa, CA; Edited by Brad Thompson and Fran Granville]
Changes Improve Schmitt Trigger -  05/13/99 EDN-Design Ideas  EDN is migrating links. This link is not verified.  Search the "title" EDN for new link.
Configurable logic gates’ Schmitt inputs make versatile monostables -  5/25/06  EDN Design Ideas....You can assemble a pulse-generation circuit from a simple Schmitt-input AND gate plus a resistor-capacitor timing network. However, if you need a logic function that’s not a standard catalog item, you need a Schmitt-input gate or inverter....PDF has several circuits, you will need to scroll to find this one.... [Design Idea by Glenn Chenier, Allen, TX]
Contact debouncing algorithm emulates Schmitt trigger -  7-Jul-05 Issue of EDN  Another approach to solving the ubiquitous contact debounce problem.... [Design Idea by Elio Mazzocca, Technical Consultant, Adelaide, South Australia; Edited by Brad Thompson and Fran Granville]

DPP adds versatility to VFC -  14-Nov-02 Issue of EDN  The basic VFC (voltage-to-frequency converter] in Figure 1 comprises an integrator (IC1] and a Schmitt-trigger circuit (IC2]. The integrator converts the dc input voltage, VIN , to a linear voltage ramp, and the Schmitt trigger sets the limits of the integrator's output voltage. Feedback around both circuits provides the condition for oscillation.... [Design Idea by Chuck Wojslaw, Catalyst Semiconductor, Sunnyvale, CA]

MOS transistors form current-mode Schmitt trigger -  12/03/98 EDN-Design Ideas....Schmitt triggers are useful in both analog and digital circuits for reducing sensitivity to noise and disturbances. Current-mode Schmitt triggers are particularly useful in photodetectors, bar-code readers, and optical remote controls. The resistorless current-mode SchmittSchmitt triggers are useful in both analog and digital circuits for reducing sensitivity to noise and disturbances. Current-mode Schmitt triggers are particularly useful in photodetectors, bar-code readers, and optical remote controls. The resistorless current-mode Schmitt….File has several circuits, scroll to this one.... [Design Idea by Tai-Shan Liao, Chun-Ming Chang, and Wen-Yaw Chung, Chung-Yuan, Christian University, Taiwan, China]
Oscillator Extends Schmitt Triggers' Reach -  01/19/95 EDN-Design Ideas.... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Resistor network extends Schmitt trigger's reach -  13-Sep-01 Issue of EDN  The circuit in Figure 1 shows a familiar technique for converting a low-level analog signal to digital form. Resistors R1 and R2 set the quiescent dc level at the Schmitt inverter's input to a value roughly equal to the midpoint of the hysteresis band. Capacitor C1 removes dc content from VIN, such that the Schmitt trigger's input signal, VI, centers itself on the midhysteresis level.... [Design Idea by Anthony Smith, Scitech, Biddenham, UK]
SC Schmitt Comparator Head -  A simple little design by Martin Keen and Wilf Rigter  (added 6/06)
Schmidt trigger -  In Dutch.  Ik kan me voorstellen dat de lezer zijn wenkbrauwen fronst, een Schmitt trigger met transistoren? Die maak je toch met een OpAmp of met daarvoor speciale ontwikkelde IC's. Soms heb je toch het probleem dat je over een lage voedingsspanning beschikt,....(added 05/08)
Schmitt Trigger -  Can also be called AN INVERTER or a SCHMITT INVERTER.  We have animated the circuit to show how the output goes high or low according to the input level. The animation shows a wide gap between the input levels….
Schmitt Trigger Circuit -  This circuit uses a single op-amp and the output is triggered by two different voltage levels. [Circuit Design by Andy Collison]
Schmitt Trigger has Dynamic threshold -  06/05/97 EDN-Design Ideas.... EDN is migrating links. This link is not verified.  Search the "title" + "EDN" for new link.
Simple changes improve Schmitt trigger -  05/13/99 EDN-Design Ideas....The classical Schmitt trigger circuit that you’ll find in textbooks provides some noise immunity, such as for the front end of magnetic pickup in position-sensor circuits (Figure 1a]. You adjust the two threshold levelse....PDF contains many circuits, scroll to find this one.… [Design Idea by Ron Patrick, ECM, Los Altos, CA]
Transistor Schmitt Trigger Oscillator -  The Schmitt Trigger oscillator below employs 3 transistors, 6 resistors and a capacitor to generate a square waveform. Pulse waveforms can be generated with an additional diode and resistor (R6). Q1 and Q2 are connected with a common emitter resistor (R1) so that the conduction of one transistor causes the other to turn off. Q3 is controlled..(added 6/06)

Schmitt Trigger Circuits


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