Common referenc dual regulator (CB8691E)

We found this symmetrical regulator in a documentation from the 70s. The circuit uses components from that time, which are difficult to find today.

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Limit Comparator (CB5086E)
This circuit appears elsewhere on the site. The circuit shown is from an American 1980s...
Relaxation Oscillator using the 741 (CB485)
This circuit can produce signals up to 100 kHz depending on C1 and R1 adjustment. The output has a...
800 Hz Sinusoidal Oscillator (CB13572E)
This circuit is from an old publication from 1977 and can be implemented with more modern...