Out-of-bounds-pulse-width-detector


Posted on Sep 18, 2012

Requiring only two ICs to monitor a train of positive pulses, this circuit produces a single positive output pulse for each input pulse whose duration is either too long or too short. You specify the minimum and maximum limits by adjusting the trimming potentiometers, R1 aod R2. You cao set the value of the acceptable pulse width from approximately 50 ns to 10 f-!S, for a 74123 monostable multivibrator. The leading edge of ao input pulse triggers one shots IClA and IClB as you cao see from the timing diagram.


Out-of-bounds-pulse-width-detector
Click here to download the full size of the above Circuit.

Each NAND-gate output is high unless either or both inputs are low, so outputs X aod Y are high unless the circuit encounters an out-of-range pulse. IC2D then gates a negative pulse from IC2B or ICZC to produce the circuit"s positive output pulse.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Capacitance to voltage meter
Lamp-Switching Circuit Circuit
TX-500 500mW FM Transmitter
Extensible Multiple Device Programmer 4 Base
28 led clock timer with 74hct circuit
12v to 120v voltage inverter circuit
ASTABLE MULTIVIBRATOR
Connection Tester
TTL Load circuit
More op-amp circuits



Top