We found this transistor circuit in a 1967 General Electric documentation. The circuit makes use of components that can still be easily found on the market, and the SCR may be a 106 type.
This circuit is from an old 80's linear circuit manual. The configuration can be implemented with modern...
This detector with ultra-low deviation was found in an American documentation from the 90s....
This circuit was found in a Signetics documentation from the 1980s. Next to the figure are the...