We found this passive circuit in the February 1995 Electronics Now magazine. The circuit is passive, presenting only attenuation that must be compensated by an amplification stage.
In a modern version this circuit can use an LED in series with a resistor in place of the lamp. The...
This is the single-sourced version of the previous oscillator. Frequency can be changed by...
This circuit is from the documentation of the 90s. Thus, the integrated circuit used is not common...