Window-comparator


Posted on May 20, 2012

A window detector is a specialized comparator circuit designed to detect the presence of a voltage between two prescribed limits; that is, within a voltage window. This circuit is implemented by logically combining the outputs of two single-ended comparators by the IN914 diodes. When the input voltage is between the upper limit, VuL. and the lower limit, VLL, the output voltage is zero; otherwise it equals a logic high level. The output of this circuit can be used to drive a logic gate, LED driver, or relay driver circuit.


Window-comparator
Click here to download the full size of the above Circuit.

The circuit shown in Fig. 16-1 shows a 2N2222 npn transistor being driven by the window comparator. When the input voltage to the window comparator is outside the range set by the VuL and I"LL inputs, the output changes to positive, which turns on the transistor and lights the LED indicator.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

Triangle-square wave oscillator
Low-Frequency Crystal Oscillator Circuit
Learn how to use 7-Segment LED Display using Arduino
converter r2elhc600a 10v
rain sensor alarm circuit
temperature sensor circuit
The K9AY receiving loop antenna
12V Fan Directly on 220V AC
Level 555 a control circuit diagram



Top