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 was found in Radio Electronics magazine from November 1960. The circuit is powered by a...
In the figure we have an application in which the input and output voltage are equal, with the...
We found this circuit in a Radio Electronics from the 90s. The circuit is for conventional analog...