Found in a Popular Electronics from the 90s, this Wien bridge oscillator uses a single-source operating. The frequency can be calculated from the formulas in the previous circuit.
This circuit was obtained from a Philips documentation from 1968. The transistors can be replaced...
The figure shows how to use the XR2206 to generate sinusoidal signals in a different way. The...
This headphone amplifier has good gain and high input impedance. The circuit is from Electronics Now and...