We've been in the age of direct RF for a while. The new cellular base stations that Nokia makes are literally eight RFSoC chips connected to 64 power amplifiers. You can get one for yourself for pretty cheap: https://www.realdigital.org/hardware/rfsoc-4x2

The reference signal generated by Si5351A is used to clock two flip flops which I believe are used to generate a 90° quadrature local oscillator (LO) which enters a dual 1-4 multiplexer acting as a Tayloe quadrature mixer. And as you know, the nonlinear switching action introduces frequency products and allows frequency conversion.

This is a pretty clever system. The RF is low enough frequency that faster logic chips can be used effectively. I recommend getting yourself a cheap receive-only SDR for around 15 bucks and play with GNURadio, if you want to get more familiar with DSP for telecommunications/radio detection

Thanks! I think the limitation is in my knowledge and not in the article or schematics!

I have a rtl-sdr and I’ve played with gnu radio, but the signals that I had to explore were very limited! Apart from few remotes for fans and stuff around the house I only had fm radio and little more.

What I find very interesting from this is the possibility of taking a Si5351A breakout board, configuring it with I2C (I can do that), modulate it with something like audio and a mixer (I can code that… maybe) and plug that directly, likely through and attenuator, to gnu radio!

It would certainly be a lot easier to get a sdr transmitter, but I wasn’t aware of the possibility of modulating a Si5351A with a “simple” signal like 48kHz audio!

"Union" is another good example

It's not hard at all to get good uA/MHz numbers, it just increases die size and cost. You can push it pretty far by tuning the synthesis, for example the same Cortex-M4 core on the Ambiq Apollo3 Blue advertises "6 μA/MHz executing from flash or RAM at 3.3 V"

These are magnitudes of difference across the Espressif, Nordic, and Ambiq parts. The difference in price is also proportional.

https://ambiq.com/apollo3-blue/

Cool, il check that out!

I'm wondering if we looked at the same document... there is no FPGA and it is PIC32MK0512GPK064 instead of STM32. It's also 12 bits at nowhere near 100 Msps, being only 18 Msps.

Did you use the aid from AI to write the comment, or are you referring to another device?

Consumer image/video processing is one of the few applications where requirements of low cost, high performance, and tolerance of poor software support and low reliability converge. It makes a lot of sense that StarFive would target that application. Most of the SoC vendors from China are competing in this same space, like Allwinner, Rockchip, Goke, Ingenic, SigmaStar, Ambarella, Fullhan, Xiongmai, etc.

Seconding this. I found out that I get mini-nightmares and get woken up if I try to sleep immediately after a hot shower, so I switched to morning showers. This also helps me set a hard wake up time since the shower gets me awake

What does POSSE stand for?

I think your sentiment encapsulates the hypocrisy of modern people where the systems have developed over thousands of years to further and further insulate us from all the less pretty aspects of life, to a point where we largely forget the fact that we shit and kill things for food and greed. Our meat comes pre-portioned on a polystyrene tray and wrapped under cellophane. Just abstract blocks of yummy protein. We also built garbage collection and sewer systems that lets most of us forget about the waste we produce. Out of sight, out of mind.

Humanely dispatching chicken is probably among the most mundane, natural, necessary, and arguably righteous aspects of what humans do to survive. While this part of the modern system is certainly not a "bad thing", I still think about my friend's opinion that everyone who eats meat should kill and process a living creature at least once in their life. If they can't handle it, then they shouldn't eat meat

Well said. I'll just add that even vegetarianism gets idealized as well. The farmers growing those crops do far worse things than humanely killing a chicken to vast amounts of wildlife that they perceive as pests.

Vegetarianism also reduces crop farming since most crops aren't directly eaten by humans (especially in richer countries):

https://ourworldindata.org/land-use-diets

I don't think hypocrisy is really the best word. The GP's objection may be uninformed or out of line with reality, but it is (likely) the result of the very distance between food source and consumption that you are talking about; ignorance not hypocrisy.

I have had the opportunity to hunt twice in my life; both times I harvested a deer. I would happily do so again. But while I disagree with the sentiment of the GP, I do agree that there is something profound about killing an animal (for food or otherwise) such that talking about it nonchalantly can be startling.

I'm probably just nitpicking here.

Perhaps expected, but I have similar feelings towards people that work at slaughterhouses. So I definitely can understand where GP is coming from.

But like you and the other poster said, killing an animal for food is a deeply ambivalent experience. For me at least.

All this kind of city people thinking goes out of the windows once you're very hungry.

Then you see everything as a piece of meat.

Usually the value isn't a big deal for "power rails" which expect to have additional capacitors connected elsewhere. However, sometimes microcontrollers expose decoupling pins for use with internal voltage converters and regulators (for example the core voltage on older STM32 parts), and those require very specific values that correspond with the tuning of feedback networks and power converter design within the IC

Thanks, that makes sense.