This signal multiplexer circuit for early low-frequency oscilloscopes was found in the May 1977 issue of Radio Electronics magazine. The circuit requires a symmetrical source.
This circuit with JFET was obtained in a book on FETs of 1989. The circuit is still current since...
This circuit was obtained from National Semiconductor documentation from the 1990s. The circuit has a...
Found in 90s documentation from Analog Devices, this circuit employs operational amplifiers of the time....