We found this circuit for video games in a Radio Electronics magazine from August 1977. The transistor can be any common RF type that reaches the desired signal frequency.
Common operational amplifiers can be used on this circuit. The resistor with no value in series with...
The power of this germanium transistor audio output stage is a few tens of milliwatts. The circuit is...
This configuration is very traditional, appearing in several publications around the world. This...