Buffer 4049 (CB26316E)

The purpose of this circuit found in a 1990s Popular Electronics is to increase the current capability of CMOS stages.

Driver for LVDT (CB7131E)
This circuit was obtained from Signetics documentation from the 80's. The components used are from...
Wien Bridge Oscillator (CB14117E)
The configuration presented below was obtained in the Linear Application Handbook of the National...
Telephone relay (CB10153E)
This circuit can be designed with ease today, as its components are common. We found it in old...