Found in American documentation, this circuit can be used as a shield. The technology is CMOS and the input is BDC. Next to the diagram formulas for calculating the components.
April 2017 - Littelfuse's new two-way discrete TVS diodes for protection against ESD up to 30 kV...
Found in an English documentation from 1989, this circuit is intended for equalization of cassette...
We can also use the 4011 on this CMOS circuit that makes use of a crystal headset. The power...