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.
The circuit is suggested by National Semiconductor in its 1994 Linear Applications Handbook. The...
This circuit was found in a Popular Electronics from the 90s. The components admit equivalents and the...
This simple digital frequency meter using CMOS circuits reaches 5 MHz frequency. Input signals are...