Hi-Low level comparator


Posted on Aug 27, 2012

The voltage to be compared is fed through diode Dl and D2 to the voltage dividers Rl and R5 where the low and high limits are present. When the voltage level of an input signal exceeds the high threshold limit set with potentiometer Rl, the diode Dl becomes forward biased and the increased voltage on the inputs of the op amp drives it into positive saturation.


Hi-Low level comparator
Click here to download the full size of the above Circuit.

Similarly, a decrease of the input voltage at the op amp inputs turns the op amp to positive saturation. Potentiometer R3 is used for zeroing the op amp in the off state.




Leave Comment

characters left:

New Circuits

.

 


Popular Circuits

ESR Meter
opto isolator Ring detector circuit transistors not fully activating
PLL FM Demodulator Circuit Module
dtmf decoder
The Forward Converter
555 timer circuit temperature monitoring system
Two channel audio mixer circuit design electronic project
DIY 100mw TV Transmitter Printed Circuit Board (PCB)
TWH9104 holiday lights ASIC



Top