This circuit was found in a 70s American documentation. The operational amplifier supports a modern equivalent. The characteristics are given next to the diagram.
The CMOS 4046 integrated circuit is not very common today, consisting of a very efficient PLL for...
Using 18 or 24 MHz crystals, this circuit is intended for producing reference signals with...
The sampling and retention circuit shown in the figure uses the LM108. In this circuit we have two MOS...