![]() ![]() ![]() Walther Bothe, inventor of the coincidence circuit, shared the 1954 Nobel Prize in physics, for creating the first modern electronic AND gate in 1924. Ludwig Wittgenstein introduced a version of the 16-row truth table as proposition 5.101 of Tractatus Logico-Philosophicus (1921). Lee De Forest's modification of the Fleming valve in 1907 could be used as an AND gate. Eventually, vacuum tubes replaced relays for logic operations. In an 1886 letter, Charles Sanders Peirce described how logical operations could be carried out by electrical switching circuits. ![]() Digital logic as we know it was the brain-child of George Boole in the mid 19th century. ![]() The binary number system was refined by Gottfried Wilhelm Leibniz (published in 1705) and he also established that by using the binary system, the principles of arithmetic and logic could be joined. ![]()
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