This dual balanced modulator configuration was obtained in a 1980s telecommunications documentation. The circuit makes use of transformers and the diodes are commonly used.
What differentiates this circuit from the many versions with the 4017, presented in our...
This is another possible version of a negative voltage generator using a 555 integrated circuit. The...
This circuit was found in Maxim's documentation from the 90's. The circuit provides 12 V x 120 mA....