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>Broadcom will produce advanced radio frequency components — including FBAR filters Thin-film bulk acoustic resonator https://en.wikipedia.org/wiki/Thin-film_
by Isamu 3mo 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_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.
- MrBuddyCasino 3mo agoFascinating. I suppose they can be smaller than quartz crystals?
- drum55 3mo agoVery little uses crystal oscillators, they’re gigantic compared with electronics today and have very wonky performance over temperature and shock.
- i_am_a_peasant 3mo agoeven txco's?
- MrBuddyCasino 3mo agoYou probably know this, they don't have wonky performance but are even bigger. An oven around a crystal.
- apcragg 3mo agoThose would be OCXOs. TXCOs are just temperature compensated.
- MrBuddyCasino 3mo agoEvery time I trust my memory it betrays me.
- cestith 3mo agoI treat my technical memories in discussions like the Russian proverb Reagan popularized in the disarmament negotiations with the Soviets. доверяй, но проверяй “Trust, but verify.” Meta: Yes, I did a quick search to verify some of this before replying.
- petesergeant 3mo agoI am getting into the questionable habit of arguing my point with an LLM before contributing it these days. > доверяй, но проверяй I wasn't aware of the source phrase, nor how much better it sounds phonetically in Russian (doveryay, no proveryay)
- MrBuddyCasino 3mo agoVery good. Sometimes I‘m too impatient.
- cestith 3mo agoI can relate.
- i_am_a_peasant 3mo agoI was more used to hearing the "Measure 7 times cut once" russian saying. :D
- cestith 3mo agoOne of my favorite Russian proverbs translates to basically “the first pancake is always lumpy”.
- ahartmetz 3mo agoIf 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://en.wikipedia.org/wiki/Surface_acoustic_wave https://de.wikipedia.org/wiki/Akustische-Oberfl%C3%A4chenwellen-Filter https://de.wikipedia.org/wiki/Akustische-Oberfl%C3%A4chenwel... (pictures)
- MrBuddyCasino 3mo agoHonestly, 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.
- ahartmetz 3mo agoAFAIK, the black magic factor is much higher for HF electronics than for HF mechanics. It's at least partially because you can build more complex systems with HF electronics. The other difference is that high frequency EM oscillations easily radiate energy in the form of photons, while high energy mechanical oscillations radiate nothing for practical purposes (at least in vacuum), gravity waves if you're being pedantic.
- MobiusHorizons 3mo agoSmall note of clarification. HF in a radio frequency (RF) context actually refers to what we would now consider fairly low frequencies between 3 and 30mhz where wavelengths are in the tens of meters. The black magic is mostly in UHF AND microwave regions where wavelengths start to measure closer to the size of circuit elements. Although I have also heard it said “RF physics is black magic” to cover all the bases
- cgyvbunji 3mo agoYes, radio found out naming is hard before software did, in very old times there was High Frequency (HF), but then circuits got fast enough to go higher, oops, ok no problem, let's call the new frequencies Very High Frequency (VHF) whew that was close, but wait they got even faster! Ugh! Ok let's call the new frequencies Ultra High Frequency (UHF), but wait, we're still not in the Ghz range yet! Thankfully they did not keep going to Super Super Mega Ultra High Frequency.
- brcmthrowaway 3mo agoFBAR is cool, but what can Claude come up with?
- pjjpo 3mo agoIf Broadcom could filter out FBAR for me would happily buy some stock. https://www.irs.gov/businesses/small-businesses-self-employed/report-of-foreign-bank-and-financial-accounts-fbar https://www.irs.gov/businesses/small-businesses-self-employe...