Suggested by National Semiconductor in documentation from the 90s, this circuit uses a switched regulator of the time. The circuit is suitable for NiCad battery charges.
Using a 4046 PLL, which is not very common nowadays, this circuit was found in the October 1994...
Found in a 1980s American documentation, this circuit has a current consumption of only 1 mA. The...
This circuit for modeling was found in a 1980s documentation. The SCR can be the TIC106 and the...