This is the basic configuration of an operational amplifier sample & hold circuit. The FET and transistor are commonly used. The circuit is from an 80's documentation.
Mouser Electronics is now offering a reference design board from ST Microelectronics STEVAL-WESU1...
Found in Popular Elecronics, this configuration also appears in this section, but obtained from other...
The circuit shown in the figure can be used on a data transfer bus using an appropriate family...