Hi,
I have to do some current sources controlled with the DAC of a RedPitaya that goes from 0 to 1.8V so I can tune a GCSR laser. The specs of the laser are in the table.
I started to design them using the application note of Analog Devices: http://www.analog.com/en/analog-dialogue/articles/diff-amp-heart-of-precision-current-source.html
The problem that I encountered is that the load resistance is around 1KΩ, so the current decreases significantly. I simulated the circuit in MultiSim, and I attached the simulation.
Is there any other topology for making the output current independent of the load resistance?
I have to do some current sources controlled with the DAC of a RedPitaya that goes from 0 to 1.8V so I can tune a GCSR laser. The specs of the laser are in the table.
I started to design them using the application note of Analog Devices: http://www.analog.com/en/analog-dialogue/articles/diff-amp-heart-of-precision-current-source.html
The problem that I encountered is that the load resistance is around 1KΩ, so the current decreases significantly. I simulated the circuit in MultiSim, and I attached the simulation.
Is there any other topology for making the output current independent of the load resistance?
Last edited by a moderator: