This two-port configuration of the 4001 was found in the April 1988 issue of Radio Electronics magazine. The timings are given by R1 and C1 as a function of the desired behavior of the circuit.
We found this circuit in a European schematic manual from the 1980s. The circuit is still current, and...
This circuit is basically the same configuration as the previous one with a power stage with...
This positive voltage regulator with 70 V output was found in a National Semiconductor manual from...