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PDN Emerging Photographer

Il mio lavoro Made in Korea è risultato fra i vincitori della selezione dell’Emerging Photographer Contest!

I lavori selezionati sono stati pubblicati sulla… 48 more words

Fotografie

Today's broker rating changes:

CSR cut to Underweight vs Equalweight – Morgan Stanley

Paladin Energy cut to Underperform vs Market Perform – BMO

Alumina raised to Neutral vs Sell – Goldman Sachs… 9 more words

CSR

PI-Power distribution network (PDN) planning

Power distribution network (PDN) planning
首先我們要先了解電源平面及地平面,就像是共振腔體,不同的大小或形狀,都會有它的諧振模態,在電源分佈網路(PDN)的設計,其實簡單來說就是去設計電源端到抽載電容,這之間的的電源路徑上,是否在有效頻寬內達到目標阻抗(Target Impedance)的要求,如果超出目標阻抗的頻率點,遇到電源抽載所造成的SSN又剛好在那個頻率點,就會造成EMI問題如之前文章提到的PI Basic–Simultaneous Switching Noise (SSN)

電源分佈網路(PDN)是什麼?

在電源系統,一定會有幾個重要部分,如下圖所示。
1.電壓調節模組(VRM)
2.電源路徑(線或平面)
3.抽載IC
4.旁路電容或解耦電容

電源分佈網路(PDN)就是電源系統的整體路徑網路,為了簡易的分析PDN,可以將它簡化為下圖的等效電路,一般電壓調節模組(VRM)首先會先接固態電容(Bulk capacitors),再接解耦電容,接下來過孔到電源層傳送電源,在接近終端器件再過孔到表面層送電到器件IC。

處理PDN有幾種狀況在抽載的解耦電容擺法,其中有一些優劣,如下說明。

1.最好的解耦電容擺法為接近抽載IC,並限制電流路徑到抽載接腳,如之前文章提到的PI Basic–Power Layout Rule on Decoupling Capacitors… 178 more words

SI/PI

My Activist Origins

I often try to think back to when I first started as a Chamorro activist.

My father says it is tied to experiences I had in South Africa, when our family lived in Swaziland for two years and apartheid was still in effect. 455 more words

Decolonization

Call for Entry | PDN presents The Curator

The search for undiscovered fine-art photographers is on through May 3.

Six new and emerging fine-art photographers will exhibit their work this summer at Foley Gallery in New York City through PDN‘s The Curator. 222 more words

TWU Photo Nexus