Comment by Isamu
6 hours ago
>Broadcom will produce advanced radio frequency components — including FBAR filters
Thin-film bulk acoustic resonator
https://en.wikipedia.org/wiki/Thin-film_bulk_acoustic_resona...
>Trends to utilize RF spectrum more efficiently with higher frequencies than roughly 1.5–2.5 GHz and in some cases also simultaneously with increasing RF output power have supported FBAR technology to become one of the key enabling technologies in telecommunication realisations. FBAR technology complements and in some cases competes with surface acoustic wave (SAW) technology and FBAR resonators can replace crystals in crystal oscillators and crystal filters at frequencies more than 100 MHz.
Fascinating. I suppose they can be smaller than quartz crystals?
If you find that fascinating already... did you know that all cellphones use mechanical filters in the GHz range? They combine very good performance with very low energy consumption.
https://en.wikipedia.org/wiki/Surface_acoustic_wave
https://de.wikipedia.org/wiki/Akustische-Oberfl%C3%A4chenwel... (pictures)
Honestly, the "HF physics is black magic" trope has made me numb to the phantastical contraptions. I appreciate when they look cool, like esoteric orgon wave radiators.
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Very little uses crystal oscillators, they’re gigantic compared with electronics today and have very wonky performance over temperature and shock.
even txco's?
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FBAR is cool, but what can Claude come up with?