作者查詢 / jfsu
作者 jfsu 在 PTT [ Electronics ] 看板的留言(推文), 共642則
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7F推: ESD fail?11/09 02:31
2F推: 因為是用p-substrate,所以用p+作為連接10/07 10:58
7F推: 因為內部的data已經讀出且被latch住了。10/07 01:34
4F推: X1_0 X1_1 ....X1_909/25 01:20
4F推: DC檔量到的應是訊號的DC Offset...用DC量AC,電錶沒有燒掉嗎?09/15 14:24
5F→: DC檔應該會濾掉AC成份09/15 14:25
1F推: 用pwlz09/08 17:34
2F→: ex: 在10ns時在test這個節點外加3V, 50ns後看電壓多少(Hi-Z)09/08 17:36
3F→: Vtest test 0 pwlz 0 0 9n 0 10n 3v 49n 3v 50n z09/08 17:37
5F推: 這個要給老經驗的技師去抓才能修得好09/04 01:24
1F推: JEDEC有寫唷08/24 01:41
25F推: 便宜的產品會用這種,材質也是epoxy,走的是貧民價格的封裝08/18 13:42
5F推: 這種問題,不能只看電路,要連layout一起看。ESD clamp有08/03 00:02
6F→: 兩個,一個是Vcc clamp,一個是Gnd clamp,你現在是哪個有問08/03 00:02
7F→: 題? 測量時,是如何給pin腳電壓? 同一批產品有幾顆發生這樣08/03 00:04
8F→: 的異常?如果有超過2顆異常,位置是否都在同一處?08/03 00:04
9F→: 要是覺得Vt不對,調出WAT看一下08/03 00:04