Circuit for sleep mode (CB8430E)

This circuit was found in a 90s Electronic Design. It uses integrated circuits that are not common today.

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Test Circuit for Inductor (MSB005E)
The arranjment sohon Bellow, and simulated in the Multisim Blue allows to see in the oscloscope...
Sampling and hold 2 (CB8417E)
Found in a 90s Maxim's documentation, this circuit employs three company components and is...
Darlington Stage with Feedback (CB975E)
This circuit was found in a 1968’s publication and uses germanium transistors. Equivalents can be...