4 ms·
Analog multiplexer employed as an RF mixer is pure genius. Of course you can only drive it with square-wave, and mixing with square-wave, intuitively, feels li
by nousermane 4y ago
Analog multiplexer employed as an RF mixer is pure genius.
Of course you can only drive it with square-wave, and mixing with square-wave, intuitively, feels like a terrible idea (think of all the harmonics!). But surprisingly, listening to the recording of the whole thing working, end result sounds A-okay!
- jleahy 4y agoIf you think about how a diode mixer works then you're using a square wave LO, same for a Gilbert cell. Remember, a square wave is just a sum of odd harmonics. The only downside is that a strong signal at a multiple of the signal of interest might get aliased into your IF. Hence bandpass filtering on the input is important.
- madengr 4y ago