Obtained from a 1980s Signetics documentation, this circuit uses a common integrated circuit at the time. The performance curves are given next to the diagram.
Found in Philips' 1967 documentation, this circuit makes use of period components. The SCR can be...
The LM143 is a high voltage operational amplifier not very easy to obtain today. The transistors used are...
Found in American documentation from the 90s, this circuit uses TTL technology and is therefore...