Published:2011/7/5 6:39:00 Author:Lucas | Keyword: Voltage / current conversion | From:SeekIC
It can switch ±10V control voltage into ±lOμA tiny current. This circuit is used as small ion-current generator for chemical reaction. In the circuit, using A2 chip with resistor A1 (INA105) and low bias current operational amplifier A2 (OPA124) inside allows conversion accuracy in 0.1%. Output current prescribed minimum is decided by leakage current from the PCB and the ratio of the required output signal current and noise current. Accessing capacitor Cl can make effective value of noise circuit reduce from 317nA to 3.9 nA.
Reprinted Url Of This Article:
http://www.seekic.com/circuit_diagram/Basic_Circuit/Voltage___current_conversion_circuit_composed_of_INA105.html
Print this Page | Comments | Reading(3)
Code: