This circuit was obtained in a General Electric documentation from the 80's, and can be used as a shield. The circuit supports current equivalent components.
Figure bellow shows how the 4510, a divide-by-1U, up/down counter with three-state outputs is...
This circuit was obtained from the Radio Electronics magazine of April 1991. The circuit is based...
This digital signal attenuator was found in a 90s Electronic Design. The circuit operates at...