It is an improved version of the previous circuit with a voltage follower that reduces the load impedance. The circuit was found in American documentation from the 1980s.
This trigger circuit was found in old European documentation, but it can be implemented with...
This logic circuit can indicate both TTL (5 V) and CMOS (5 to 12 V) output levels, operating with...
This circuit is from a 1975 technical publication. The PNP transistor can be the BC558 and the NPN a...