Operational Amplifier based Schmitt Trigger with Digitally Controllable Hysteresis

International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Year of Publication: 2017
Faroze Ahmad

Faroze Ahmad. Operational Amplifier based Schmitt Trigger with Digitally Controllable Hysteresis. International Journal of Computer Applications 171(2):31-33, August 2017. BibTeX

	author = {Faroze Ahmad},
	title = {Operational Amplifier based Schmitt Trigger with Digitally Controllable Hysteresis},
	journal = {International Journal of Computer Applications},
	issue_date = {August 2017},
	volume = {171},
	number = {2},
	month = {Aug},
	year = {2017},
	issn = {0975-8887},
	pages = {31-33},
	numpages = {3},
	url = {http://www.ijcaonline.org/archives/volume171/number2/28156-2017914988},
	doi = {10.5120/ijca2017914988},
	publisher = {Foundation of Computer Science (FCS), NY, USA},
	address = {New York, USA}


A simple and low-cost circuit for controlling hysteresis of Schmitt trigger is proposed in this paper. The hysteresis of the circuit is digitally tuned by employing binary-weighted resistors in place of feedback resistor. The behavior of proposed circuit has been tested experimentally in hardware. The results obtainedare satisfactory and are also presented.


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Binary Weighted Resistors, Operational Amplifier, Schmitt trigger.