High-speed peak detector (CB9699E)

This circuit was obtained from an American documentation from the 80s. Integrated circuits are from that time and are not easy to find today.

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Class A power amplifier (CB22236E)
This circuit is from an American publication from the 60's. The power is on the order of 600 mW....
LED Driver MC34071 (CB15285E)
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Device On indicator (CB7014E)
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