This circuit was obtained from an Electronics Design of 1964. The circuit makes use of tunnel diodes that are uncommon today. The circuit works with very weak signals.
This circuit was found in an 80's EDN. The circuit uses a current common CMOS, the 4093 powering...
The aim of this circuit is the protection of a 2N3055 transistor, avoiding the overheat. The...
We obtained this circuit from the 1977 National Semiconductor FET Databook. The frequency depends only...