This circuit from a 1968 Motorola documentation provides a 120 AC output with 60 Hz from a 48 V DC input. The circuit uses transformers and coils of commercial types of the time.
This circuit was found in a Texas Instruments linear application manual from the 1990s. The...
This high-power circuit was found in a documentation from the 90s. The circuit can use more...
Found in a 90s Popular Electronics, this touch switch uses a single sensor. PLLs are common today....