Hoffman Amplifiers Tube Amplifier Forum
Other Stuff => Other Topics => Topic started by: DummyLoad on November 02, 2017, 03:09:27 pm
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advanced technology at the time... 1 bit full adder vacuum tube developed circa 1950. i had no idea such technology existed. i was always under the assumption that the logic elements in the day were totally discrete.
BTW, a full adder has a carry input so 1+1=1 if carry-in=1, carry-out=1. a half adder has no carry input, so 1+1=0 carry=1. google for truth tables.
https://www.eeweb.com/profile/max-maxfield/articles/mysteries-of-the-ancients-the-additron-tube
--pete
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http://www.mif.pg.gda.pl/homepages/frank/sheets/201/6/6047.pdf
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This says it is (I did not check) a full-adder in BJT. The stacked pairs would not work as well in hollow-state.
(https://i.ytimg.com/vi/LAxhGq-RmnU/maxresdefault.jpg)
I'm also finding 14 and 20 transistor schemes. More parts is, of course, potentially faster or better defined outputs.
All this was lost when RTL made raw device logic obsolete.
I wonder how the Additron would sound in a fuzz pedal?
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I wonder how the Additron would sound in a fuzz pedal?
warm snuggly :l2:
I failed at standard algebra but ate up Boolean, go figure! :think1: