GeoAVR
Member level 2
Hi all,
I want to control the Bias and Modulation current of a laser diode using a microcontroller, a DAC and discrete components (including operational amplifiers).
Current range 3mA to 25mA with 0.1mA step.
Current pulses: rise time few nanoseconds, 10% max overshoot
I have found this circuit from TI that controls the current based on its input voltage:
1. Will it work?
2. How can I combine two of them for adding Bias and Modulation current?
I need also a current to voltage converter at the photodiode. I need to detect the pulses and their current.
What do u propose?
Thank you
I want to control the Bias and Modulation current of a laser diode using a microcontroller, a DAC and discrete components (including operational amplifiers).
Current range 3mA to 25mA with 0.1mA step.
Current pulses: rise time few nanoseconds, 10% max overshoot
I have found this circuit from TI that controls the current based on its input voltage:
1. Will it work?
2. How can I combine two of them for adding Bias and Modulation current?
I need also a current to voltage converter at the photodiode. I need to detect the pulses and their current.
What do u propose?
Thank you