Multi pellet diode regulator (CB8798E)

The used diode is an unusual component today. We found this 12 V regulator in documentation from the 90s.

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“Buffered” Phase Shift Oscillator (CB12741E)
The buffered phase shift oscillator circuit shown in the figure oscillates at a frequency of 2.9...
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This amplifier, found in a documentation from the 90's, is based on the well-known integrated...
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