Guarded input picoammeter circuit


Posted on Mar 13, 2013

The circuit utilizes CA3160 and CA3140 BiMOS op amps to provide a full-scale meter deflection of ± 3 pA. The CA3140 serves as an 1T0 gain stage to provide the required plus and minus output swing for the meter and feedback network.


Guarded input picoammeter circuit
Click here to download the full size of the above Circuit.

Terminals 2 and 4 of the CA3160 are at ground potential, thus its input is operated in the ' 'guarded mode.''




Leave Comment

characters left:

Related Circuits

  • New Circuits

    .

     


    Popular Circuits

    300mW FM Transmitter
    Capacitor internal resistor meter
    Multiplying-converter
    Arduino GoPro Hero2 Control
    Head light timer circuit
    5v regulated solar cell power supply circuit diagram
    preamp onboard
    relay tutorial
    Constant Voltage Speaker Measurement Circuit
    Converting an EV PL-76 or 1776 microphone to p48 powering
    circuit to test servo motor (pole rotor) of parabolic antenna
    Nightlight lighting circuits



    Top