This circuit uses components of the time. We found it in a 1968 US documentation. The delay is 100 ns and the input impedance is 1 k.
This circuit was found in an Electronics Now from the 90's. The integrated regulator circuit and...
This circuit is suggested by National Semiconductor in its Linear Applications Handbook. It makes...
The circuit shown is from the 1993 Motorola Linear Interface ICs. The power source may be common...