This circuit is from a 1924 book by Gernsback. The receiver uses two tubes and listens to headphones. Power is supplied by battery with the indicated voltages.
This circuit simulates a resistor controlled by digital signals. We found it in American...
We found this circuit in a 1978 publication. It is possible to detect the emission of infrared in remote...
Found in a 2005 Linear Technology application manual, this circuit provides outputs from a current...