This circuit uses an unusual sensor nowadays, but the configuration can be adapted to more modern types, as well as the operational amplifier. The circuit is from an 80's documentation.
We found this circuit in a 1981 publication. We applied an audio signal, for example, a music...
The circuit presented was obtained in the 1994 Linear Applications Handbook from National...
An inproved version of the circuit CIR129E is shown here. The resistorR1 must be at least 5 times...