Hi,
This is a circuit I'm working on for a hydrophone. I have blueprints for a circuit using op-amps but was wondering if the circuit below would be any good?
It is a bias applied to a transistor using a voltage divider. I was wondering how to apply the dc bias to the voltage divider on the left without affecting the incoming signal. Could I just couple the top junction of the voltage divider to a dc voltage? Would that give me a quiescent point dependant on the voltage divider that would simply show a rise or drop from half the applied dc voltage for the incoming signals, or am I barking up the wrong tree here?
The bit on the right is just a low pass filter. I'm listening for low frequency sound.
Thanks, kindly in advance,
Chris