This is another sampling and holding circuit found in a factory manual from the 1980s. The circuit can be implemented with more modern components. The FET is not a common component today.
This circuit is from an old publication but can be implemented with modern silicon transistors such as...
This circuit uses two JFET such as the BF244 or BF245 and has an excellent gain with small...
The presented circuit is suggested by Texas Instruments (www.ti.com) in its Application Report...