john

啊？
蛤！

[john @johnluan_]

@eevblog 我认为传统算法和布局布线的适配性更好，比如模拟退火和遗传算法，深度学习可以作为辅助和一些经验的提取。现在应该做的是用Agent编程把传统算法和计算机图形学结合在一起。不过AI发展得很快，关注一下不是坏事。

[john @johnluan_]

@nahitafu 首先，大模型不适用于自动布线，模拟退火和遗传算法等强约束传统算法更适用于自动布线。其次，现代电路设计的核心在硅和软件实现。最后，我实在想不到嘉立创工艺范围内有什么值得中国抄的。

[john @johnluan_]

@FAyaguchi 而且中国有电子元件旧货市场，有专门的人做这样的生意。我买了一些ADC32RF80和DAC38J82，只要25 CNY。并且它们也是次日达的

[john @johnluan_]

@insane_analyst @jwt0625 CPO的那点距离根本没到讨论四波混频的程度。硅光系统最大的问题应该是PIC带宽和可靠性

[john @johnluan_]

@matpsy_6022 很欢乐的样子

[john @johnluan_]

@tuxoneth @Ma_WuKong 以中国人的政治素养来说，确实会导致普通人看同一件事更长远���本源。中东的长期动乱，本质上是冷战后格局的衍生。石油美元，以及美俄战略角力导致了中东长期军阀混战。戏里戏外，其实中国人给出了方案：吃饱饭有产业有希望，人就不会变成恐怖分子。你说苦难是恐怖分子造成的，谁又来承受人民的苦难呢？

[john @johnluan_]

@eevblog 中国只是在履行自己的登月计划，竞争？我们承认阿波罗登月，不是吗🥴

[john @johnluan_]

@canmi21 USBC公头里面的塑料件可以拆一些，然后重新打印塑料托架，可以将部分器件向右移动到连接器内部，然后用01005和csp器件可以���多的压缩体积，屏幕也有更小的可以选择

[john @johnluan_]

@jwt0625 他们没有楔焊机吗

[john @johnluan_]

@teraytech 好漂亮的板子

[john @johnluan_]

@jwt0625 In the industry, EML refers to an electro-absorption modulated laser. There is no SOA involved, nor is there an optical circulator. The high-power laser (>100mW)refers to a DFB laser, which is only used to provide a constant light source.

[john @johnluan_]

占空比失真至少是原因之一

[john @johnluan_]

Why does directly connecting a 10 Gbps PRBS signal generated by an AWG to a spectrum analyzer show power at 10 GHz?
Is it due to pre-emphasis or leakage from the CDR's VCO?

[john @johnluan_]

附加啁啾的光眼图，手里没激光器，值设置得比较随意。

[john @johnluan_]

@suarezvictor If you need any additional info, I’d be happy to provide it.

[john @johnluan_]

I am more than happy that you like it! In fact, I am a newcomer to ZYNQ and SDR. This board is not completed yet. I have uploaded it to GitHub and attached instructions. you can find it here: https://t.co/4dA1n8AE1y

[john @johnluan_]

40%

[john @johnluan_]

@suarezvictor However, I haven't thoroughly verified the RF section. The LDO is difficult to buy, and the LC balun is not suitable for wideband application. and the resistors for the DCDC circuit need to be recalculated.

[john @johnluan_]

@suarezvictor I have already verified the ZYNQ section of this board. A DDR reset resistor under the SD card slot interferes with it. However, DDR still functions normally even without installing it. The DDR can run at the max frequency supported by ZYNQ, and USB also works properly.

[john @johnluan_]

@Mirko_DIY If they sell this board, it will be more popular than RPi5.

[john @johnluan_]

就是这小小的白点，是我们的一切

[Historic Vids @historyinmemes]

Pale Blue Dot is a photo of Earth that was taken by the Voyager 1 space probe in 1990 from a distance of about 6 billion kilometers (3.7 billion miles) as it was leaving our solar system. This is what Carl Sagan said about the photo:

"Look again at that dot. That's here. That's home. That's us. On it, everyone you love, everyone you know, everyone you ever heard of, every human being who ever was, lived out their lives. The aggregate of our joy and suffering, thousands of confident religions, ideologies, and economic doctrines, every hunter and forager, every hero and coward, every creator and destroyer of civilization, every king and peasant, every young couple in love, every mother and father, hopeful child, inventor, and explorer, every teacher of morals, every corrupt politician, every 'superstar,' every 'supreme leader,' every saint and sinner in the history of our species lived there — on a mote of dust suspended in a sunbeam.

The Earth is the only world known so far to harbor life. There is nowhere else, at least in the near future, to which our species could migrate. Visit, yes. Settle, not yet. Like it or not, for the moment the Earth is where we make our stand. It has been said that astronomy is a humbling and character-building experience. There is perhaps no better demonstration of the folly of human conceits than this distant image of our tiny world. To me, it underscores our responsibility to deal more kindly with one another, and to preserve and cherish the pale blue dot, the only home we've ever known.”