OP AMP BASED MONOSTABLE MULTIVIBRATOR 741

Posted on Feb 5, 2014

The circuit remains in stable state until a triggering signal is applied to its input. After getting the triggering signal the output transit from stable to Quasi-stable state and return back after a time period. So a Single Pulse isgenerated for single Trigger. Consider the instant at which the output Vo=+Vsat. At that time diode D1 damps the Capacitor voltage, Vc at 0. 7V.

OP AMP BASED MONOSTABLE MULTIVIBRATOR 741

Click here to download the full size of the above Circuit.

Feedback voltage is + ²Vsat at Non-Inverting terminal. When the negative trigger is applied, the potential at Non-Inverting terminal becomes less than 0. 7v the output switches to -Vsat, which makes the diode more negative than - ²Vsat. Comparator switches back to +Vsat. The Capacitor C starts charging to +Vsat through R until Vc reaches 0. 7v and C becomes damped to 0. 7v.

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