This simple circuit for headphones or small speakers was found in documentation from the 90s. The circuit works with voltages from 5 to 9 V and has good gain.
Using an era germanium transistor, this 1960s circuit reverses the phase of relatively low...
This circuit generates sinusoidal and cosine signals of 2 kHz given basically by the values of C1...
Suggested by Motorola in 1968 documentation, this circuit has an efficiency of 70%. Power...