7400 competition entry: Discrete logic preamp

in 7400 contest by DP | 0 comments

Haley0918 entered his Discrete logic preamplifier into the Open 7400 Logic Competition.

Through some experimentation he figured out that a XOR gate shows some analog properties. By modulating the input between 0.8v and 1.2v the output was swinging between 1v-4v, making the logic IC a preamplifier with a gain of 7.5. You can check out his circuit in action below.

Via the forum.

This entry was posted in 7400 contest and tagged , .

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