Found in an American 1980s documentation, this circuit compares signals from two TTL sources, providing an output that depends on the frequency difference. The circuit can be used as a shield.
August 2017 - New DTMOS Super Junction MOSFETS from Toshiba are in stock at Mouser Electronics....
In the figure we have the configuration of the circuit as a conventional Darlington. In this...
This circuit is from the 80's documentation. The integrated circuit is from the time but can be...