4tuty
Member level 3
I want to measure differential voltages from two photodarlington(PD)
1. reference fiber
2. sensing fiber connected single IRled to both PD via fiber optic.
I used LM328 as differential amplifier (Gain 2.2). I am not getting correct output View attachment nre.pdf. Is there any mistake in my circuit or shall i go for singly supply differential amplifier IC like INA 132.
Please find the attachments for my circuit
1. reference fiber
2. sensing fiber connected single IRled to both PD via fiber optic.
I used LM328 as differential amplifier (Gain 2.2). I am not getting correct output View attachment nre.pdf. Is there any mistake in my circuit or shall i go for singly supply differential amplifier IC like INA 132.
Please find the attachments for my circuit