The document referenced in the blog does not say anything about the single transistor multiply.
replyHowever, [1] provides the following description: "Taalas’ density is also helped by an innovation which stores a 4-bit model parameter and does multiplication on a single transistor, Bajic said (he declined to give further details but confirmed that compute is still fully digital)."
[1] https://www.eetimes.com/taalas-specializes-to-extremes-for-e...
It'll be different gates on the transistor for the different bits, and you power only one set depending on which bit of the result you wish to calculate.
replySome would call it a multi-gate transistor, whilst others would call it multiple transistors in a row...
That, or a resistor ladder with 4 bit branches connected to a single gate, possibly with a capacitor in between, representing the binary state as an analogue voltage, i.e. an analogue-binary computer. If it works for flash memory it could work for this application as well.
replyThat's much more informative, I think my original comment is quite off the mark then.
replyI'd expect this is analog multiplication with voltage levels being ADC'd out for the bits they want. If you think about it, it makes the whole thing very analog.
replyNote: reading further down, my speculation is wrong.
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