Picoammeter circuit with 4 ranges
This circuit uses a CA3420 BiMOS op amp to form a picoammeter with 4 ranges. The exceptionally low input current (typically 0.2pA) makes the CA3420 highly suited for use in a picoammeter circuit. Input transient protection is provided by the 1 megohm resistor in series with the input. The 10 megohm resistor connected to pin 2 decouples the potentially high input capacitance often associated with lower current circuits and reduces the tendency for the circuit to oscillate under these conditions. The 10k potentiometer is used for null offset.
Learn more about new james bond on our website
Title: Picoammeter circuit with 4 ranges
electronic circuit
Source: Harris Semiconductor
Published on: 2005-02-10
Reads: 658
Print version: 
Other electronic circuits and schematics from Test and measurement
-
Decibel Meter
-
Thermostat for 1KW Space Heater (SCR controlled)
-
Continuity Tester
-
Function Generator
-
Oscilloscope testing module (huntron circuit)
-
Electronic Thermostat and Relay Circuit
-
Triangle / Squarewave Generator
-
Transistor Tester
-
Inductive meter adapter
-
Latching Continuity Tester