The circuit shown is from National Semiconductor, having been found in the 1994 Linear Application Handbook. Rt and Ct determine the output frequency.
In this receiver, the emitter-base junction of the transistor works as a detector. The transistor is a...
This circuit was obtained from an old documentation, but as it uses still current components it can be...
This simple demonstration circuit was found in a Popular Electronics of the 1980s. It can be...