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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Current to voltage converter for grounded loads (CB9338E)
Found in an Electronic Design from the 90s, this circuit uses components from that time....
Non-inverting AC amplifier with LM741 (CB25922E)
We found this amplifier with 50 MΩ input resistance in the May 1989 Radio Electronics magazine. The...
Ultra High Gain Amplifier (CB4940E)
This setting appears elsewhere in this section. This was obtained from an American 1980s...