This low frequency sinusoidal oscillator was obtained in documentation from the 1970s. Operational equivalents can be used. The FET is a general-purpose type.
This circuit for analog video signals was found in a Linear Technology integrated circuit manual. The...
This circuit was found in a Japanese magazine from 1971. The circuit uses Japanese transistors of the time,...
This circuit is from 80's Linear Technology documentation. Equivalent operational amplifiers can...