This circuit of 1965 documentation makes use of a tunnel diode to retard a pulse without distortion. The components are from the era.
This circuit uses a large surface diode to detect radiation (alpha and beta particles, in addition to...
This preamplifier for the phonographic capsule was obtained in an Argentine publication from 1973....
This circuit is from a 1993 publication and can be implemented with any optical isolator that has...