Three-input majority gate (CB7248E)

This interesting logic circuit was found in a manual of neon lamp applications.

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10 nA to 10 mA Current Amplifier (CB5391E)
This six-decade logarithmic current amplifier was found in a 2005 Linear Technology manual. The...
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This circuit was obtained in a 1979 English magazine. This circuit is a treble filter that,...
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