This circuit from the 90s has RIAA equalization with a gain of 35 dB at 1 kHz. The circuit has an input sensitivity of 2.2 mV for an output of 100 mV.
This interference rejection circuit for telegraphy was found in a 1980s documentation for radio...
We found this configuration in the Linear Applications Handbook published in 1994 by National...
Found in an Electronic Design from the 80's, this circuit monitors a three-phase line, activating a...