PHANTON POWER OPTICAL MICROPHONE SYSTEM

摘要

The invention provides a noise suppresson phantom power optical microphone system having an optical microphone consisting of a light source having an input terminal, a membrane and a photodetector having an outpout terminal, the system including a signal amplifier connectable to the outpout terminal of the photodector; a processing amplifier connected to the output of the signal amplifier for providing high amplification to relatively weak input signals and low amplification to relatively strong input signals; a first circuit connecting the input terminal of the light source to a phantom power source; a second circuit connecting the outpout of the signal amplifier to the first circuit, and a third circuit connecting the output of the processing amplifier to the first circuit.