Found in an 80's Electronic Design, this circuit is based on the ICL7107 which is not an easy component to obtain today. The circuit is compatible with TTL and CMOS.
This circuit was found in documentation from the 80s. The components are from the time, but the...
This circuit is from Philips' 70s documentation. Transistors can be replaced by modern...
This circuit was found in a 2006 publication. It uses discrete components and CMOS that are still...