This Intersil circuit was found in a 1980s documentation. Operational are of the time, but current equivalents can be experienced. The graph with the circuit performance is given next to the diagram.
April 2017 - Mouser Electronics is supplying the SP8008 line of diode arrays of Litelfuse. The new...
This 80's circuit has an input resistance of the order of 880 M and gain 10, using operational...
Figure bellow shows how the 4510, a divide-by-1U, up/down counter with three-state outputs is...