Wien Bridge
This Vienna bridge oscillator generates a sinusoidal signal whose frequency depends basically on C2 and C4. The circuit is from an Electronics Now from December 1993.
We found this circuit in the October 1990 issue of Radio Electronics magazine. The frequency can...
For reference only, this is the first IF amplifier stage of a common transistor radio from the...
This receiver we found in a 1992 documentation operates in the 27 MHz band, triggering a relay...