This symmetrical four voltage source was found in a 1968 Motorola documentation. The circuit is of a type that was commonly used in that time amplifiers.
The frequency of this oscillator is determined only by the crystal, without the use of tuned...
We found this interesting transistor generator in European documentation from the 1980s. The...
This filter rejects signals below 300 Hz and signals above 3000 Hz, being used in...