We found this CMOS circuit for excitation of a relay in an old documentation. The transistor is a general-purpose high voltage as used in the power supply.
This circuit appears at various points on this site and in this section and can be designed with...
This circuit allows you to couple a TTL circuit output to the input of a CMOS circuit. The base is a...
This circuit is from 1999 documentation. The integrated circuit used is not very common today. Both...