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4khz is the signal from the emitter.The sensor should sense nly signal in tis range.Actually the output from the first stage is in range of 1.4-1.7v rectangular pulse.i already ve first stage.I ve to design 2nd stsge so that output will be 2v rectangular pulse.Instead of rectangular pulse i m...
I m using LMV794 as amplifier circuit for photodiode BPW34S.In first stage i put 5.6M resistor and 10Pf.The supply voltage is 3.3v.The first stage output is aroud 1.5-1.7v.In second stage one input is 0.9v dc and other is the output from first stage.I used 6.8k resistor to obtain 2v finally.But...
Thanks audio guru for your reply.But as u told gain is 1,i need formula how to calculate it.since photodiode is used it is difficult to simulate.i want to calculate gain theoritically.
The amplifier has three stages.The input source is photodiode BPW34. i want to calculate gain for individual stages.i don no wat formula should be used.How to calculate...pl sumone help.I attached the circuit diagram.Also wat s te difference of taking output from emitter than collector??
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