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:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    Heater temperature controller
    Gibson Clavioline Keyboard Instrument (1953)
    telephone ring generator circuit
    Audio Signal Generator
    Slave Flash Trigger
    PGA103 offset voltage correction circuit diagrams
    Thyristor - slip motor regulator circuit



    Top