Citizens of EE Web.
I could really use your advice.
I've been wrestling with a pesky noisy phototransistor for quite a long time, and am at wit's end.
The sensor is being used to transuce an audio signal in the 1-5kHz range. Unfortunately the shot noise is introducing a broadband "hiss" into the audio that cannot be filtered, or at least not completely because it overlaps the audio signal.
Can anyone recommend a simple circuit to effectively "Dolby" filter such noise?
Thanks in advance for sharing your ideas!
Most obliged,
Jim
I could really use your advice.
I've been wrestling with a pesky noisy phototransistor for quite a long time, and am at wit's end.
The sensor is being used to transuce an audio signal in the 1-5kHz range. Unfortunately the shot noise is introducing a broadband "hiss" into the audio that cannot be filtered, or at least not completely because it overlaps the audio signal.
Can anyone recommend a simple circuit to effectively "Dolby" filter such noise?
Thanks in advance for sharing your ideas!
Most obliged,
Jim
