This circuit was found in a 1964 Electronic Design. The transistor may be a current equivalent of general use. The frequency ranges from 100 to 150 Hz.
April 2017 - Microchip's new PICLF153 microcontrollers that already incorporate analog and...
Found in a 1980s documentation, this amplifier uses an integrated circuit of the era. The RLC...
We found this circuit that converts a direct voltage into a proportional frequency signal. The...