Buffer 4049 (CB26316E)

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

FET preamplifier and equalizer (CB8162E)
Found in an Electronics World of 1966, this circuit makes use of FETs of the time. Modern...
Adjustable Range Pass Filter (CB6730E)
This setting that applies to any operational amplifier was found in an old documentation. For the indicated...
Full Comparator (CB6548E)
Applying an operational of the time, this circuit of an old documentation can be elaborated with modern...