Akhil Mohan
Member level 2
Design of Amplifier stage in between a phototransistor out and PIC uc
Hello,
Please help me to design an an inverting amplifier that is attached. The output from a photo transistor(not photo diode as given in figure) is to be amplified and I have drawn the schematic. The output of the amplifier is connected to the PIC to detect a high on a particular pin.
R3 and R4 are used to minimize output offset voltage.
At what cases coupling capacitors are needed and in the above circuit is it necessary and if so where to connect and how to design the capacitor values.
output impedance of photo diode stage is 3.3K
Thanks in advance
Hello,
Please help me to design an an inverting amplifier that is attached. The output from a photo transistor(not photo diode as given in figure) is to be amplified and I have drawn the schematic. The output of the amplifier is connected to the PIC to detect a high on a particular pin.
R3 and R4 are used to minimize output offset voltage.
At what cases coupling capacitors are needed and in the above circuit is it necessary and if so where to connect and how to design the capacitor values.
output impedance of photo diode stage is 3.3K
Thanks in advance
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