Symmetrical Inverter (CB6647E)

This circuit reverses the signal if both positive and negative. We found it in an American documentation from 1969.

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1 kHz Band Pass Filter with Two Operational LM3900 (CB14190E)
We found this circuit with a Q factor of 25 in the Linear Applications Handbook by National...
15 W Stereo Amplifier (CB18504E)
This circuit was found in a Japanese publication from 1971. The circuit uses components from the...
Momentary indicator (CB22125E)
When this circuit is activated the LED flashes for a moment indicating that the function has been...