The TAA865 integrated circuit used in this 1986 project is no longer common today. The circuit is a documentation of the time and the time is given by RC that has indicated the maximum values.
Suggested by Maxim in documentation from the 90s, this circuit has its response curve given next to...
Found in a 1969 Ferranti documentation, this circuit uses only bipolar transistors from that time....
Found in a 1960 General Electric documentation, this crowbar circuit blows the fuse in case of...