o***z
发帖数: 133 | 1 if you modify the file via sth like an afs client
you may need to synchronize your local clock with that of the server |
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p**v
发帖数: 853 | 2 how to synchronize the local clock with the server?
thanks. |
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j***u
发帖数: 26 | 3 从manchester code中recover clock，我看了很多patents，当中都用到delay the
manchester input signal by 1/4 or 3/4 or 1/3 bit peirod等等。电路图上只是画
了个框里面写delay，可是这个delay circuit是啥东西都没有提，郁闷死我了。请问大
侠们，这个delay到底是怎么实现的，非常感谢 |
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s***w
发帖数: 521 | 4 walmart 刚买的alarm clock有一根长长的细天线,以前的什么也没有,FM/AM也不错,这
是为什么呀? 技术退步了? |
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le
发帖数: 190 | 6 假设这个clock是given，做个pll太麻烦了吧。 |
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ET
发帖数: 10701 | 7 想不出还能有其它办法。
觉得总要找个reference clock有这么个50% duty cycle的。
pll其实也没那么复杂。 |
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h********t
发帖数: 555 | 8 Block 1, you can use a relaxation oscillator. its frequency is depending on
RC. You can switch in/out capacitors digitally. The problem is you need to
trim resistor to take care of process variation, and the resistor needs to
have almost zero temperature coefficient, if you really want a precise
output frequency and also want it stable over temperature. In most design, I
doubt such requirement is really necessary. If you already have an external
clock, you can probably use PLL to do so. it is m |
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d**********y
发帖数: 7 | 9 You may see hold violation since the valid data time after the clock
transition is reduced. |
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h****n
发帖数: 5 | 10 I think if this enable signal is only valid for the current F/F, the delay
of the clock enable may result in hold-time violation of current F/F. At the
same time, it may also bring set-up time violation for successive F/Fs.
Am I right? |
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e****c
发帖数: 840 | 11 板子上要用到2个micro-controller
两个mocro-controller通过SPI bus communicate
如果我给这两个micro controller各自用一个12MHz的crytal作为clock input，那么
power up板子的时候会有问题么？
多谢！ |
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T******T
发帖数: 3066 | 12 The two micro-controllers does not have to be completely synchronous to each
other.
The SPI master/slave controllers and their associated buffer/fifio on either
device will tolerate much slower rate spi traffic completely ignorant of
the fact that the two clock input source are not aligned.
Now, if you are pulling I/Os from one device straight into the other device
without synchronization, and the circuit requires alignment then that won't
work. Otherwise, you should be ok.
Why put in two sepa |
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e****c
发帖数: 840 | 13 太感谢了
放2个crytal的原因是有一个controller可以run faster，所以我想这样我就可以换
crystal later if I need higher speed
会有一个signal从slave的GPIO直接连到master的GPIO，it's just a data ready
signal。是不是这样的话就会有问题？
clock buffer是什么？有推荐的parts么？我找来看一看
each
either
device
't
a |
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a********e
发帖数: 381 | 14
1) 在hardware level，用几个osc和板子power up过程是否正常并无必然联系；如果
power up过程出问题也应该是firmware和软件层的问题
2）两个时钟源对于SPI没有影响，因为SPI是同步接口。从器件会利用主器件发来的随
路时钟进行数据采样
3）没必要用clock buffer，成本比crystal贵 |
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T******T
发帖数: 3066 | 15 同意，自己琢磨出来的反而牢固，你老板就是让你充分想到整个系统的power on and
reset
timing. 这个很重要，crystal 和pll的warmup/settling delay 在power up的时候你都
要考虑到，把glitchy clock propagate 进系统就悲剧了。 |
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j******e
发帖数: 1424 | 16 Whole bunch of clock buffer, ICS553MILF or PHILIP 74LVC126 is what I mainly
use now
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I***a
发帖数: 704 | 17 我可以先去掉clk的dont_touch_network属性，然后利用已经设置的set_driving_cell和set_max_transition,进行incremental
compile给clk加上buffer，
但是这个不是clock tree synthesis啊，因为没有对插入buffer后clk的skew进行约束.
Design Compiler是不是没有CTS的功能？ 因为Design Compiler没有提供set_max_skew(Quartus II 有这个命令)这样的命令。
thanks. |
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h*******o
发帖数: 778 | 18 why you need to add buffer in synthesis stage?
There is no placement and floorplan information.
The tool does not know how to insert buffer to reduce clock skew anyway..
route以后做的. |
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j******e
发帖数: 526 | 19 一直在做analog，做过PMIC和RF
但是没做过clock，pll之类的，但是基本概念还是有的
最近收到一个dream company的电面通知，应该准备哪些方面呢？
有经验的给点拨一二吧，谢谢了 |
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c**e
发帖数: 5555 | 20 带宽问题。frequency synthesizer主要抑制片上噪声，带宽较大；clock recovery抑
制reference噪声，带宽较小。 |
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b*********r
发帖数: 39 | 21 CS考试是不是每个testing room 都有clock? 多谢大家帮忙解答！ |
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h******u
发帖数: 602 | 22 Yes.But it is not a good idea to monitor the time you spent by watching the
clock. |
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m********e
发帖数: 212 | 23 agree. stop the clock if you see any abnormal labs which alert you to take
some actions(new orders or bring patient back to office).
exam |
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n***a
发帖数: 1373 | 24
Yes. but you are always asked to "stop now" or "continue" before the alarm
is out in UW software.
Is it true that when you advance the clock to a certain time, the software
will show you all the results one by one that were obtained before that
specific time? |
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l*******r
发帖数: 39279 | 25 下午找出前三年的体检报告，发现2011，2012，2013的体重是比较恒定的，以每年小于
2斤的速度增加。2011年装修经常跑来跑去，夏天瘦了几斤，2012年跑步减肥5斤，但是
冬天又弹回去了，2013年5月体重还是比较正常的，不知道咋回事也不知道是哪个时间起
体重飙涨，百思不得其解。2014年比2013年同一时间增加10斤，我的神啊！
遥想10年前，也是一样的情形，忽然之间整个人像发面一样，半年内增加10磅，我当时
分析原因是本来游泳然后停止了导致发面现象。2004年的时候6个月减了30磅，呵呵。1
0年过去了，不但反弹还胜从前，悲催！有一次某科学家说，人的体重会在某一个时间点
突然变化，然后稳定在平台期一段时间。看样子这样的clock存在于我身上，现在努力减
肥，恢复到2011年水准。10年以后，20年以后变成老太太了还得减肥。 |
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w*******y
发帖数: 60932 | 27 Panasonic ZT01L Travel Fog Free Mirror $2.99 free ship
Panasonic ZT01L Travel Fog Free Mirror:
http://www.jr.com/travel-fog-free-mirror/pe/PAN_ZT01L/#productTabDetails
#productTabDetails" rel="nofollow" target="_blank" onclick="try{pageTracker.
_trackEvent('thread', 'click', '2118800 - panasonic-fog-free-shaving-travel-
mirror-wbuilt-in-light-and-clock,-$3-free-ship');} catch(err) {return true;}
">Panasonic ZT01L Travel Fog Free Mirror [Panasonic ZT01L Travel Fog Free
Mirror:
http://www.jr.com/t |
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w*******y
发帖数: 60932 | 28 Sears
Craftsman Robot Tire Clock
= $4.97 with free store pickup
|
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w*******y
发帖数: 60932 | 29 HOME Dual Alarm Clock Radio with AM and FM Presets for iPhone and iPod is
for $71 + $7.99 shipping w/ coupon code STBLU
Amazon Price is $90
Wake to AM/FM, iPhone/iPod or buzzer / Bass & treble control / 3D balance /
Reso8 ported cabinet stereo speakers / Time sync / Adjusts to time zone
Reson8 ported cabinet stereo speakers with 10-watt output Remote controls
unit & iPhone/iPod functions and menus Line-in, listen to other audio
devices
Link:
https://www.electronics-expo.com/index.php?page=item&i |
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w*******y
发帖数: 60932 | 31 Amazon: Casio Men's MQ24-7B2 Analog Black Resin Strap Watch:
http://www.amazon.com/exec/obidos/ASIN/B000GB0G7A
for $6.99 (68% off) FSSS
get free Casio Illuminator Travel Clock:
http://www.amazon.com/gp/product/B001R4C7FY
on the Special Offers and Product Promotions:
Click on "Add both to card" & check out.
Watch Information
Brand Name: Casio
Model number: MQ24-7B2
Part Number: MQ24-7B2
Item Shape: round
Dial window material type: Mineral
Display Type: analog
Clasp: Buckle |
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w*******y
发帖数: 60932 | 34 Eight O'Clock Coffee, Hazelnut Whole Bean, 33-Ounce Bag
$9.63 -15% SaS -25% coupon COFF9I54
Personally, I really dig this coffee. Its one of my fav cheap brands/flavors
There are a few other of the 33oz bags that the coupon works for, but none
matching this price.
Enjoy!
Link:
http://www.amazon.com/Eight-OClock-Coffee-Hazelnut-33-Ounce/dp/B002ZOG2B0
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w*******y
发帖数: 60932 | 37 Add to cart
Apply coupon code: USAVEMVC with kohls charge
Alternate: apply coupon code: SWEEPS10
Shipment is 99c
Link:
http://www.kohls.com/kohlsStore/electronicsgames/brandsforelect Technology Atomic Digital Wall Clock with Wireless Temperature Sensor.jsp
I got this total with kohls charge
Subtotal: $15.00
Percent Off (15%): -$2.25
Total Shipping: $0.99
Total Tax: $0.00
Total: $13.74
Good luck for CA!!
|
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w*******y
发帖数: 60932 | 38 Amazon has 11 oz. bags of Eight O'Clock 100% Colombian Whole Bean Coffee in
a pack of 4 bags for $15.65 using Subscribe & Save, which includes free
shipping. This works out to $3.91 a bag or 2 .75 lbs of coffee for $5.69 lb
. Be sure to to use the blue box on the right side of the page to purchase
using Subscribe & Save. This is normally about $23 or $24 on Amazon
Link:
http://www.amazon.com/Eight-OClock-Coffee-Colombian-11-Ounce/dp
|
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w*******y
发帖数: 60932 | 39 Link:
http://www.amazon.com/gp/feature.html/ref=amb_link_355435262_12
Save up to 40% on Eight O Clock products sold by Amazon.com. Save 25% when
you enter code SOLOCOF5 at checkout. Plus, save an additional 15% when you
combine the instant rebate with your Subscribe & Save order--bringing your
total savings to 40%.
|
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w*******y
发帖数: 60932 | 40 Eight O'Clock Coffee, 100% Colombian Whole Bean is the finest blend of award
-winning 100% Colombian coffee beans. Eight OClock 100% Colombian Coffee is
a medium roast with a lingering sweet finish. so rich and full-bodied, youll
understand why Arabica beans from Colombia are so sought after.
link:
http://www.amazon.com/Eight-OClock-Coffee-Colombian-33-Ounce/dp
the price is $10.50 with subscribe and save.
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w*******y
发帖数: 60932 | 42 Use coupon 771828 for 25% off and Free Shipping no minimum.
For those not familiar with Stage Stores, it is Bealls, Goodys, Palais Royal
, Peebles and Stage
Sorry about the price estimations but I had to run the thread-no idea when
coupon expires-I think it is on borrowed time.
Other deals to be found, the $12.49 cent 22 ounce jars work out to $9.36 in
cart:
Link:
http://shop.stagestores.com/home-gifts.html?cat=75&dir=asc&orde
Yankee CandleRed Apple Wreath Scented Candle:
http://shop.stagestores... 阅读全帖 |
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w*******y
发帖数: 60932 | 43 Eight O'Clock Coffee, 100% Columbian Whole Bean, 40-Ounce Package $13.99 at
Amazon
Choose Subscribe & Save for additional 15% off bringing the price down to $
11.89.
Free shipping on orders over $25, cancel subscription any time.
LINK:
http://www.amazon.com/Eight-OClock-Coffee-Columbian-40-Ounce/dp
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w*******y
发帖数: 60932 | 47 Features:
Powered by 4.5V AC adapter or 4 x AA batteries (not included)
LCD screen powered by 2 x AG13 batteries (included)
7 colors of light change automatically
12-hour and 24-hour time formats
Supports calendar
Supports thermometer
Alarm Clock: 8 alarm songs
Snooze function
shipping by christmas will be close. ordered today and it says at the latest
will be received by the 21st!
Link:
http://www.focalprice.com/EX006W/Kitty_LED_Color_Change_Digital
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g******y
发帖数: 2517 | 48 Lacrosse Technology WT-8005U - 9-Inch Digital Atomic Wall Clock, 52%折扣
http://amzn.to/uhAW5q
进入页面后点右侧的"View Lightning Deal" |
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