Adjustable reference (CB21540E)

We found this circuit with 5.3V zener in a Philips publication from the 60s. The op amp could be a modern equivalent.

Multimedia PWM Amplifier (CB17971E)
This circuit provides a power of the order of 2 W, characterized by high performance. The output...
12 V to 110 V x 60 Hz Inverter (CB13913E)
This 12 V to 110 V inverter with 100 W was found in a 1977 Signetics manual. The transformer must...
Amplifier 100 plus 100 V (CB15799E)
The gain of this amplifier is given by the components indicated in the formulas next to the...