This circuit is from the 1990 Motorola Data Databook. The circuit can be implemented with equivalent transistors. The power supply must be symmetrical.
More inputs can be added to this adder that we found in the January 1995 Electronics Now magazine....
This filter was found in an American publication from the 1980s. The circuit can be implemented with...
Found in a 90s American documentation, this circuit can be used as a shield, just change the...