Surge voltage generator (CB21465E)

Found in a 1967 US magazine this circuit generates positive and negative voltage pulses from a negative transition of the input signal.

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Sequential Switch (CB9109E)
The presented circuit was found in a 90’s Electronic Engineering. The circuit is based on CMOS...
General Purpose Phone Amplifier (CB974E)
We find the original version of this circuit in an English publication (1986). It is a...
LM1875 Non-Inverting Composite Amplifier (CB26268E)
Found in a 1990s Electronics Now, this circuit uses a period-specific integrated circuit that...