Voltage follower with 1G ohm input resistances


Posted on Feb 5, 2014

This circuit uses an LM11 to form a voltage follower with 1G ohm input resistance built using standard resistor values. With the input disconnected, the input offset voltage is multiplied by the same factor as R2; but the added error is small because the offset voltage of the LM11 is so low. When the input is connected to a source less than 1G ohm


Voltage follower with 1G ohm input resistances
Click here to download the full size of the above Circuit.

, this error is reduced. For an ac-coupled input a second 10M resistor could be connected in series with the inverting input to virtually eliminate bias current error; bypassing it would give minimal noise.




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    High frequency analog switch
    1KHz Square Wave Generator Circuit
    thermometer dengan avr
    radio station blocker circuit
    charging small nimh battery from air by
    Low-Power Voltage Reference
    XTR112 114 bridge input current excitation circuit diagram
    You can set 1 10 100 1000 times magnification programmable amplifier



    Top