7400 competition entry: Discrete logic preamp

Posted on Friday, October 21st, 2011 in 7400 contest by DP

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 on Friday, October 21st, 2011 at 7:35 am and is filed under 7400 contest. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.

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Recent Comments

  • TrickyNekro: Gladly! Can happily make also a video about it :-D
  • Chris: Random comment...
  • Greg: bloop
  • Iain: A random comment from a very random commenter...
  • W2PAW: maybe this week?