AnsweredAssumed Answered

current source component selection criteria

Question asked by cmbhatt76 on Jun 19, 2014
Latest reply on Jun 22, 2014 by JinoL



i have designed constant current source with the following value of resistors




the resistor which decides the current, Rx=1Mohms


here i have attached the circuit diagram for the same.


input is AC voltage 500mV with a fixed frequency of 250kHz.


please suggest if 1Mohm is a right value for Rx or it should be limited by the Opamp IC used for the circuit. and if so which parameter i should look into?


thanks and with best regards


constant current source circuit.jpg