This sample and hold circuit is from a 1969’s documentation. However, it can be built with modern equivalent components, including the matched pair of transistors.
Found in an American publication from the 90s, this circuit allows the supply of 3, 6 and 9 V...
This circuit was found in Motorola's 1968 documentation. It can be built on current equivalent...
This circuit matches a high impedance input signal with a low impedance output. This circuit is...