We found this circuit in a Linear Technology documentation from the 80's. It has a demodulator, being suitable for links and remote controls. Note the unusual type of detector configuration.
This circuit is found in the Italian magazine Radio Elettronica, August 1975 issue. There is a...
This signal follower is from a 1970's documentation. So it uses the traditional configuration at the time...
We find this circuit in an old American documentation from the 80's. The integrated is from the...