Fast adder 1 (CB7055E)

We found this circuit in an Electronic Engineering from the 90s. It applies to any logical family.

Voice Filter (CIR25261E)
This circuit was presented in a January 1990 Radio Electronics magazine article as part of a home...
Nonlinear Gain Amplifier (CB6130E)
This nonlinear gain circuit was found in a 1965 Electronic Design. The configuration can be used...
Frequency divider with varicap (CB6826E)
Found in a 1965 Electronic Design, this circuit divides the frequency of a 50 MHz signal by 2. The...