This normally open, two-terminal, high-sensitivity circuit was found in General Electric's technical documentation from the 1980s. The circuit is half-wave.
This sample and hold circuit configuration was found in a manual from the 70s. The operational amplifiers...
In this 1990s circuit, found in a National Semiconductor manual, the output voltage is the square of...
This circuit of a publication from the 70's uses a different type of power that we had already...