Precise One Shot Circuit

Posted on Dec 3, 2012

This approach uses a Hip-Hop, a shift register, and two gates (A). Before the one-shot pulse, the output of the NOR gate is 0. Consequently, the data input of the D-type flip-flop is equivalent to the trigger. When a trigger pulse is present, the flip-flop initiates the one-shot pulse, and the n-stage sliift register controls the pulse width, tw, which is a multiple of the clock`s period (B). The precision of the one- shot, pulse is determined by the clock period, which is inversely proportional to its frequency. For the circuit to work properly, the width of the trigger pulse, tw(, should be greater than one clock period.

Precise One Shot Circuit
Click here to download the full size of the above Circuit.

The OR gate masks the trigger`s effect when the circuit is generating the desired pulse. The net result is a circuit that functions as a nonretriggerable multivibrator. When the pulse needs to be only one-clock- period wide, the circuit can be simplified. All that`s required are two D-type flip-flops and an AND gate. However, despite its simplicity, this circuit generates a more stable and precise one-shot pulse than a multivibrator.

Leave Comment

characters left:

New Circuits



Popular Circuits

Headlight circuit
4-Decade Square-Wave Generator
Simple Curve Tracer Circuit
Bat detector frequency counter
555 Tone Generator Circuit (8 ohm speaker)
Stereo balance indicator
3 V/5 V Low Power Synchronous Voltage-to-Frequency Converter
Dual Relay Driver Board Circuit Schematic
Precision frequency counter tachometer