Delete comment from: Ken Shirriff's blog

DHess said...

Tektronix used the same dual differential pair structure to perform a variety of logic and analog multiplexing and amplification functions starting in the 1970s. I will have to take a second look now that I know about NTL (non-threshold logic), although there is little available online about it. Unfortunately all of the commercial transistor arrays suitable for implementing these functions like the CA3102 are out of production.

Apr 26, 2021, 12:18:46 PM

Posted to Teardown of a logic chip from a vintage IBM ES/9000 mainframe