k**f
发帖数: 11 | 1 要用micrometals的RF toroid做一个center-tapped inductor，应该怎么绕线呢？谢谢
！ |
|
l******3
发帖数: 1 | 2 请问90nm中，电感如何提取，对于一个1nH的spiral inductor，它的等效电阻是多大？
谢谢 |
|
N*******g
发帖数: 1089 | 3 如果一个flyback transformer, 我把两个windings并联起来， 作为primary side, 现
在primary side得inductance 是不是就使原来的1/2了？
一个Linear Tech得application engineer说，in the case of coupled inductors or
transformers placing windings in parallel results in the same inductance....
哪位能给分析一下？
谢谢！ |
|
I****0
发帖数: 182 | 4 我想测一个inductor的inductance数值，大约是在0.39uH。试了几个RLC meter，还上
了impedance analyzer，都没法准确测量。好像是stray inductance太高了。
不知道哪位有相关经验的，能指导一下？谢谢！ |
|
I****0
发帖数: 182 | 5 我想测一个inductor的inductance数值，大约是在0.39uH。试了几个RLC meter，还上
了impedance analyzer，都没法准确测量。好像是stray inductance太高了。
不知道哪位有相关经验的，能指导一下？谢谢！ |
|
b***y
发帖数: 100 | 6 Thanks again for your reply. Your replies have been very helpful for me.
One more question: although the inductor doesn't have much effect on the
output ripple, if I really
want to calculate the effect of inductance on the output voltage ripple is
there a formula can do the
job?
How do we usually pick a inductor in boost/buck circuit design? Smaller
inductor can provide more
current and large inductor can provide less but more stable current?
Thanks,
to |
|
V*****n
发帖数: 893 | 7 pic 1: air-core inductors, the best. the small inductor has been unwounded
to read the target value.
pic 2: xover board for the mid (left part) and tweeter (right four
components)
Pic 3: xover board for the woofers. the huge inductor is for the .5 (lower
woofer)
pic 4: finished xovers in the lower compartment of the tower. |
|
ET
发帖数: 10701 | 8 compensator是个OTA我明白，但从我贴的示意图上来看，它输出一个ic(t), 这个ic(t)
怎么就成了inductor上的peak current呢？这里面一定有个定量关系吧。
对buck来说，inductor上的current，在充电过程中，有slope = (v0-vg)/L, 在放电过
程中，有slope = v0/L,
同时，output voltage上也有ripple, 用linearwise piece来近似的话，应该是vout=v
dc + vac, 这个vac应该控制着ic(t) - 经过compensated的OTA.
我这个推导中，漏了2个地方，一个是inductor charge cap.得到vac,
如果这个vac的式子有了，我乘以Gm，也就能得到ic(t)了。
anything
. |
|
g*z
发帖数: 124 | 9 looks simple in theory, however, there's no such thing called ideal inductor
, ideal capacitor, you've got to simulate with real inductor/capacitors.
since you are designing a narrow band filter, you've got to have a inductor
with very large Q |
|
g*z
发帖数: 124 | 10 what kind of inductor are you using? don't tell me you are using inductors
with ferrite cores. At least you should look some keyword like copper foil
inductors or copper air core coils. |
|
h*********g
发帖数: 43 | 11 我记得已经有文章比较了SC converter和inductor based converter的power density
，结论是SC并不输给inductor based。个人感觉SC做起来比inductor based要简单，因
为没有复杂的PWM control，环路补偿，可是没有什么实际应用，这很奇怪。也许就是
因为环路太简单了，所以dynamic response不行？ |
|
J**********7
发帖数: 2619 | 12 新手常犯的错误就是一开始发力过猛.
shimano的刹车对这种错误更tolerant.
Casting brakes are the thing that prevents birdsnest when casting, every
brand has the variations and combinations of brakes but there are
essentially 2 main types, magnetic and centrifugal. As a general rule
centrifugal brakes are better at controlling the spool at the beginning of
the cast where as magnetic brakes are better at controlling the latter part
of the cast. What does that mean to an angler? It means centrifugally
controlled reels are more ... 阅读全帖 |
|
g*******r
发帖数: 140 | 13 A rough calculate for boost converter output ripple:
During DT when inductor is charging, output is purely discharged by ILoad.
Thus Vo(ripple)=Iload*DT/Co.
Thus the inductor does not affect the output ripple very much in boost.
Of course, if taking ESR into account, output voltage will have jump due to
discontinous capacitor charging current.
If you want to find the proper L&C, you could just do some simple openloop
simulations with ideal component and obeserve output ripple for that.
question |
|
g*******r
发帖数: 140 | 14 I did not calculate the relationship accurately. But it should not be
difficult. During phase1, output is solely discharged by load; During phase2
, output is charging by inductor, output will be increased until inductor
current is lower than loading current. You could calculate the output
voltage drop in phase1 plus that in phase2..
For choosing L&C, I suggest you find some typical products matching to your
design, and follow their L&C configuration.
the |
|
a******t
发帖数: 75 | 15 工业界不仅care efficiency，更多时候更care cost.
铜比铝做high Q inductor更有效，不光在电导率，更在于能做到比较thick.在低于
5GHz的频段，金属的loss在影响inductor Q的因素最显著。Substrate loss自从有
pattern ground shielding之后，已经不是最明显的影响Q的因素。工业界一般都用
pattern ground shielding （PGS）。 即使不用PGS，也可以用很多layout的方法来减
少sub loss,比方说，用NTN layer来增加sub resistance.
铜比铝还有个好处在于EMI，相同width,铜比铝能handle更多的current,这在PA设计中
非常重要.因为PA在peak power里一般要handle非常高的DC current.
HBT |
|
s*******y
发帖数: 4173 | 16 Do you ever think about the huge area of inductor in chip. Meanwhile, it is
hard to get accurate value of capacitor, resistor, inductor. |
|
s*******y
发帖数: 4173 | 17 Do you ever think about the huge area of inductor in chip. Meanwhile, it is
hard to get accurate value of capacitor, resistor, inductor. |
|
d****o
发帖数: 1112 | 18 优点：
远程控制方便，这个datacenter里面用的很多据说，而且每个power ic company都在做
用户不用担心电路是否稳定，节省测试时间，对于analog不熟的工程师来说比较简单
反应比较快？对负载变化很大很快的应用，比如CPU的Vcore比较有用
缺点：
太新，我一般对刚上市的power ic敬而远之，谁知道他的code有没有bug
麻烦，需要用I2C来控制，而且一般不提供集成的FET driver
效率似乎和传统的模拟方案差不多，电源的功耗主要在FETs和inductor上了，这些东东
和driver以及FET, inductor自身的特性更有关系吧，控制做得再精细能减少多少损耗？
一点浅见 |
|
g******u
发帖数: 3060 | 19 Not only the tolerance matters.
However, if the test result differs a lot from simulation, it's because his
source circuit sees a lower impedance at RLC filter as a load.
inductor
inductor |
|
a******e
发帖数: 331 | 20 大家如何做ON-CHIP INDUTOR
Doing RFID, 433.9 MHz, Q requirement for inductor quite high.
How to do on-chip inductor, what is your recommendation?
Any advice is appreciate. |
|
a******e
发帖数: 331 | 21 0.13 Global Foundry or 0.13 IBM(this one better had top thick metal but much
more expensive)
Design kits inductors all targeted and measured at 2.5G, useless
Anyone using tools to estimate/design inductor such as Ansoft HFSS or any
tools from agilent?? |
|
g******u
发帖数: 3060 | 22 well it really depends on what transformer you will design....
for RF, for grid, or for electronics?
For power electronics, the best would be McLyman's transformer and inductor
design handbook, also I heard Flanagan's transformer app handbook is not bad
either.
Wurth also published two books on inductor and transformer, I think they are
adequately good too. |
|
s***d
发帖数: 15421 | 23 这个我是知道的，ic的版图的尺寸远远小于lambda/4，所以不用匹配，但是我的问题是
，LNA的负载一般是个电感，还有本身的寄生电容，以及mixer的rg+cgs，为了最求max
gain，是不是有必要调的mixer的 rf input transistor 的 size 来调整rg+cgs，或者
可以干脆用matching 使之匹配。我跑了仿真，对于mixer
来说在2.4GHZ，的rf input 管子都有30左右以及1000+的虚部。当然我也可以调整
inductor的大小实现 LNA的 inductor load 和mixer的 cgs 谐振来实现gain最大。 |
|
m*****t
发帖数: 3477 | 24 主要区别在于device model本身。RF model要求更精确的parasitic RLC一般要用s-
parameter analysis来做extraction。对于FET的gate resistance，noise,，sub-R-
net等方面比较侧重。很多特制器件(inductor,varactor etc）model不scalable,一般采
用macro-model。如果RF device是III-V的，那么有专用的model来表征。
通用的analog/mixed-signal model注重基本DC，CV特征。对matching,monte-carlo，
leakage，tempCO及device linearity等feature要求高。Model一般采用compact(HV的
除外)，大多scalable。一般model corner会wider（比digital窄），便于IP reuse.
PDK本身自然也有差别，design rule, pcell spacing等等。
charaterization上其实区别可能最大，不是几句话能说清楚的。
如果你是PD... 阅读全帖 |
|
h*******l
发帖数: 252 | 25 There is another way to do it on earlier power ics.
Use RC to be in parralel with inductor.voltage cross c is proportional to
inductor current. |
|
n******h
发帖数: 2544 | 26 I read his question again. The systems use a constant current source. Well,
first I guess he meant constant amplitude AC current source, DC constant
source won't have practical meaning in transformer.
The system loss definitely goes higher. But if the question is about the
loss in primary coil:
If current flows into primary coil is constant, then the loss in it should
be constant, at first order. It is I^2*Rp. This assumes frequency is not too
high and every component is still in their comfortab... 阅读全帖 |
|
a*********e
发帖数: 518 | 27 对直流来说，inductor理论上就是短路，capacitor就是开路。
对交流来说，因为inductor会把电流的变化转化为磁场能量存储/释放，就成了感抗，
同样，电容具有容抗。
感抗 = iwL w是omega=2*pi*f，容抗 = 1/(iwC)
可以看出感抗和频率成正比，频率越高感抗越大，容抗则相反。i是虚数单位，表示交
流通过电感和电容以后电压/电流的相位会有90度的提前或滞后变化。 |
|
o**o
发帖数: 561 | 28 there are a few different ways to collect traffic data. for example, you can
use the camera mounted besides the traffic lights at the intersection. you
can have censors such as those inductor loops on the ground (notice those
strange loop shapes on the ground while you are driving?). or you can have
the vehicle install gps and transmission devices to send the position and
speed information to the data center. |
|
a*****y
发帖数: 33185 | 29 http://www.scientificamerican.com/article/high-power-microwave-
High-Power Microwave Weapons Start to Look Like Dead-End
Despite 50 years of research on high-power microwaves, the U.S. military has
yet to produce a usable weapon
By Sharon Weinberger | September 12, 2012
E-BLAST
Nature
By Sharon Weinberger of Nature magazine
For some Pentagon officials, the demonstration in October 2007 must have
seemed like a dream come true — an opportunity to blast reporters with a
beam of energy that causes s... 阅读全帖 |
|
发帖数: 1 | 30 全球95%的笔记本电脑在中国大陆生产，90%的台式机在中国大陆生产，80%的手机
在中国大陆生产，然而，中国大陆却没有电子产业，原因很简单，中国大陆在关键电子
元件领域是空白，一无所有。拆开笔记本电脑，除了最低端的显示屏由京东方少量提供
外，其余任何一个零部件，包括外壳，都是外资企业做的。笔记本电脑中除了CPU、硬
盘外，台湾厂家全部都能够生产。而大陆企业是零。说起来你可能要吃惊，例如索尼这
样的高端笔记本电脑，有相当一部分是由台湾最小的笔记本电脑显示屏厂家中华映管提
供的屏幕。即便是看起来技术含量不高的键盘、外壳，也基本上被台湾人垄断了。
电子产业有三样最核心的元件，一是处理器，笔记本电脑的处理器90%都是英特尔
的，台式机则由英特尔和AMD掌控，智能手机的处理器由高通、苹果、三星和英特尔占
据，台湾的联发科技也占有部分低端智能手机市场。二是内存，三是被动元件。后两者
很少被人提及，今天我就说说。
内存目前分两大类，一类是DRAM，另一类是Flash，主要是NAND。DRAM主要配合CPU
做缓存，NAND主要存储代码和数据，早期的手机用Nor Flash存储代码，后来手机的软
件系... 阅读全帖 |
|
发帖数: 1 | 31
全球95%的笔记本电脑在中国大陆生产，90%的台式机在中国大陆生产，80%的手机
在中国大陆生产，然而，中国大陆却没有电子产业，原因很简单，中国大陆在关键电子
元件领域是空白，一无所有。拆开笔记本电脑，除了最低端的显示屏由京东方少量提供
外，其余任何一个零部件，包括外壳，都是外资企业做的。笔记本电脑中除了CPU、硬
盘外，台湾厂家全部都能够生产。而大陆企业是零。说起来你可能要吃惊，例如索尼这
样的高端笔记本电脑，有相当一部分是由台湾最小的笔记本电脑显示屏厂家中华映管提
供的屏幕。即便是看起来技术含量不高的键盘、外壳，也基本上被台湾人垄断了。
电子产业有三样最核心的元件，一是处理器，笔记本电脑的处理器90%都是英特尔
的，台式机则由英特尔和AMD掌控，智能手机的处理器由高通、苹果、三星和英特尔占
据，台湾的联发科技也占有部分低端智能手机市场。二是内存，三是被动元件。后两者
很少被人提及，今天我就说说。
内存目前分两大类，一类是DRAM，另一类是Flash，主要是NAND。DRAM主要配合CPU
做缓存，NAND主要存储代码和数据，早期的手机用Nor Flash存储代码，后来... 阅读全帖 |
|
发帖数: 1 | 32 全球95%的笔记本电脑在中国大陆生产，90%的台式机在中国大陆生产，80%的手机
在中国大陆生产，然而，中国大陆却没有电子产业，原因很简单，中国大陆在关键电子
元件领域是空白，一无所有。拆开笔记本电脑，除了最低端的显示屏由京东方少量提供
外，其余任何一个零部件，包括外壳，都是外资企业做的。笔记本电脑中除了CPU、硬
盘外，台湾厂家全部都能够生产。而大陆企业是零。说起来你可能要吃惊，例如索尼这
样的高端笔记本电脑，有相当一部分是由台湾最小的笔记本电脑显示屏厂家中华映管提
供的屏幕。即便是看起来技术含量不高的键盘、外壳，也基本上被台湾人垄断了。
电子产业有三样最核心的元件，一是处理器，笔记本电脑的处理器90%都是英特尔
的，台式机则由英特尔和AMD掌控，智能手机的处理器由高通、苹果、三星和英特尔占
据，台湾的联发科技也占有部分低端智能手机市场。二是内存，三是被动元件。后两者
很少被人提及，今天我就说说。
内存目前分两大类，一类是DRAM，另一类是Flash，主要是NAND。DRAM主要配合CPU
做缓存，NAND主要存储代码和数据，早期的手机用Nor Flash存储代码，后来手机的软
件系... 阅读全帖 |
|
发帖数: 1 | 33
全球95%的笔记本电脑在中国大陆生产，90%的台式机在中国大陆生产，80%的手机
在中国大陆生产，然而，中国大陆却没有电子产业，原因很简单，中国大陆在关键电子
元件领域是空白，一无所有。拆开笔记本电脑，除了最低端的显示屏由京东方少量提供
外，其余任何一个零部件，包括外壳，都是外资企业做的。笔记本电脑中除了CPU、硬
盘外，台湾厂家全部都能够生产。而大陆企业是零。说起来你可能要吃惊，例如索尼这
样的高端笔记本电脑，有相当一部分是由台湾最小的笔记本电脑显示屏厂家中华映管提
供的屏幕。即便是看起来技术含量不高的键盘、外壳，也基本上被台湾人垄断了。
电子产业有三样最核心的元件，一是处理器，笔记本电脑的处理器90%都是英特尔
的，台式机则由英特尔和AMD掌控，智能手机的处理器由高通、苹果、三星和英特尔占
据，台湾的联发科技也占有部分低端智能手机市场。二是内存，三是被动元件。后两者
很少被人提及，今天我就说说。
内存目前分两大类，一类是DRAM，另一类是Flash，主要是NAND。DRAM主要配合CPU
做缓存，NAND主要存储代码和数据，早期的手机用Nor Flash存储代码，后... 阅读全帖 |
|
w********u
发帖数: 90 | 34 我的车是korando越野车，2.9L 柴油发动机的, 检查车的时候，修车师傅说先插钥匙启
动电源，然后仪表盘会出现一个 inductor coil 的标志，等这个标志消失后再启动发
动机。 我的理解是： 启动电源后，电池会对车里面的电感充电，然后利用电感的能量
启动发动机，电感放电可以瞬间产生大电压，有点像boost converter 的原理。但是如
果直接启动发动机， 好像也是可以的，但是对于柴油发动机来说，不知道是否对某些
启动装置有害。等待牛人给解答。 |
|
l******h
发帖数: 2 | 35 Highly reputational company with very competitive compensation for all
positions.
Please send in your resume and position/positions you like to apply to my
email address below.
h*******[email protected]
All resumes will be deliver to hiring manager directly. Act fast!
Thanks!
Silicon Engineering Group
Sr. Physical Design Timing Engineer
Timing (STA) Manager
Senior Physical Design Engineer
CAD Manager - Front-End Design and Verification
Sr. CAD Engineer - Place & Route / Physical Design Engineer
Sr. CA... 阅读全帖 |
|
w********1
发帖数: 9 | 36 hi
本公司有数个Sr. Application Engineer openning.
Specific responsibilities are
Research and define switching mode power supply topologies based on the
specialties of the company's products.
Work with IC designers on new product development and research new
applications for new generations of company IC products.
Design and develop switching power supply units (psu) using the company's
products for design ideas, data books or customer requirements such as
providing power supply unit (psu) prototype, b... 阅读全帖 |
|
G****o
发帖数: 229 | 37 我在听，目前主要是讲如何推箱子
project是做 guitar amp 估计都是重点在做音箱吧
Week 1
Lesson 1: Introduction to wave propagation, simple oscillating systems,
sound pressure, sound waves, the speed of sound, wavelength, frequency and
wavenumber, sound pressure level, and auditory directional cues.
Lesson 2: Electronics fundamentals - charge, current, voltage, resistance,
Ohm’s law, DC circuits, finding currents and voltages in simple circuits
Week 2
Lesson 1: Reflection and absorption of sound, resonances in air columns,
res... 阅读全帖 |
|
R****s
发帖数: 635 | 38 这么多劝你转马工的，哥替你着急，忍不住放下手中的工作，
给你啰嗦两句。Power Electronics比通信，信号处理，控制，
图像好找工作，面也宽。硬件设计方面，做低压的干不了高压，
做高压的可以干低压。Power Electronics还有一个特点，越老
越值钱，无数的经验学校里根本学不到，全靠做项目自己观察
总结。花这么多精力整个master，又放弃了改马工，真可惜。
行业方面，一个是半导体，做power semiconductor的，
包括Power Diode, MOSFET，IGBT, TVS ....一般都需要有
power electronics背景的人做application engineer，就那么
几家，Vishay, Fairchild， Toshiba，Infineon, Onsemi, ST，
IRF,一家一家试。把课本里power device那章好好看看，再看两篇
datasheet和application Notes,足够应付面试了。另一种是
做Power converter controller IC的，就是那些PWM controller,
In... 阅读全帖 |
|
R****s
发帖数: 635 | 39 这么多劝你转马工的，哥替你着急，忍不住放下手中的工作，
给你啰嗦两句。Power Electronics比通信，信号处理，控制，
图像好找工作，面也宽。硬件设计方面，做低压的干不了高压，
做高压的可以干低压。Power Electronics还有一个特点，越老
越值钱，无数的经验学校里根本学不到，全靠做项目自己观察
总结。花这么多精力整个master，又放弃了改马工，真可惜。
行业方面，一个是半导体，做power semiconductor的，
包括Power Diode, MOSFET，IGBT, TVS ....一般都需要有
power electronics背景的人做application engineer，就那么
几家，Vishay, Fairchild， Toshiba，Infineon, Onsemi, ST，
IRF,一家一家试。把课本里power device那章好好看看，再看两篇
datasheet和application Notes,足够应付面试了。另一种是
做Power converter controller IC的，就是那些PWM controller,
In... 阅读全帖 |
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l******h
发帖数: 2 | 40 Highly reputational company with very competitive compensation for all
positions.
Please send in your resume and position/positions you like to apply to my
email address below.
h*******[email protected]
All resumes will be deliver to hiring manager directly. Act fast!
Thanks!
Silicon Engineering Group
Sr. Physical Design Timing Engineer
Timing (STA) Manager
Senior Physical Design Engineer
CAD Manager - Front-End Design and Verification
Sr. CAD Engineer - Place & Route / Physical Design Engineer
Sr. CA... 阅读全帖 |
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w********1
发帖数: 9 | 41 hi
本公司有数个Sr. Application Engineer openning.
Specific responsibilities are
Research and define switching mode power supply topologies based on the
specialties of the company's products.
Work with IC designers on new product development and research new
applications for new generations of company IC products.
Design and develop switching power supply units (psu) using the company's
products for design ideas, data books or customer requirements such as
providing power supply unit (psu) prototype, b... 阅读全帖 |
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T******T
发帖数: 3066 | 42 听起来是电路问题，你的DOOR LATCH/TRIGGER assembly 应该拆了看看为什么接触不好
，因为这个电路被切断是比较普遍的原因。 不过你这次的情况应该不是door latch,
因为是洗完前突然断电的，所以水才没有被完全drain出去。
我上次坏了也是洗了一半断电的，水也没有drain出去，也是用手舀，后来测试一番才
发现是thermal fuse暴了，网上订了一个，换了，面板通电成功后，按drain才把剩下
的水给继续drain掉了。
看看这个视频吧，把fuse 拆了用电表测测电阻，然后再订零件, 建议干脆也订个新的
door latch吧，一劳永逸解决所有问题。如果不是fuse的原因，那么建议visual
inspect 整个电路板，看电容，inductor，等有没有烧坏，鼓起的迹象，其实这些板子
上的零件不多，而且超大，都是可以DIY换的。
其实比较麻烦的是测试，和确保装回去的时候密封，服贴，不用焊的话，换零件就是5-
10分钟的事儿：
http://www.youtube.com/watch?v=tvJEipkJFPs
thermal fuse replacem... 阅读全帖 |
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s*n
发帖数: 2603 | 43 Foxconn product:
Accessory Parts
Accessory
Audio Jack
Audio Jack Connector
Automotive
USCAR
Backplane Connector
Backplane Conn Backplane Connector Cable End Connector
Din 41612 Conn Foxtral 2mm Conn Future Bus 2mm Conn
Hard Metric 2mm Conn
Board to Board Connector
Board to Board Connector
Board-to-Board Connector
Board to Board Connector ... 阅读全帖 |
|
h***g
发帖数: 566 | 44 哥们,现在更便宜了
发信人: miniplayer (mplayer), 信区: deals
标 题: Meritline has a 30-in-1 Screw Driver For Housings and Office-Cell
Phone,
PDA , PSP, NDS, MP3, PC, La
发信站: BBS 未名空间站 (Sat Mar 6 10:01:33 2010, 美东)
Meritline has a 30-in-1 Screw Driver For Housings and Office-Cell Phone, PDA
, PSP, NDS, MP3, PC, Laptop, etc.. for $2.99 when you enter code
MLCK192177030520NL1 at checkout. Thanks Valci
They also have Infrared Ray Inductor Sensor Bar for Wii Console for $2 when
you enter code MLCK267079030562NL1 a |
|
发帖数: 1 | 45 What Happened To GaN And SiC?
Early predictions were overly optimistic, but these technologies are
starting to make inroads.
About five years ago, some chipmakers claimed that traditional silicon-based
power MOSFETs had hit the wall, prompting the need for a new power
transistor technology.
At the time, some thought that two wide-bandgap technologies—gallium
nitride (GaN) on silicon and silicon carbide (SiC) MOSFETs—would displace
the ubiquitous power MOSFET. In addition, GaN and SiC were suppos... 阅读全帖 |
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c*******l
发帖数: 4801 | 46 packaging的话，弄点最基本的resistor, cap, inductor etc看看就成了吧 |
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L*******y
发帖数: 231 | 47 贡献一下经历，希望对后来人有帮。
昨天和skywork 的人 phone screen 了一把。他们两个人，从iowa打来。开头主要问现
在在做什么，谈谈phD的课题，用过什么设备，仿真软件的应用（ADS's harmonic
balance and Momentum).之后他们有问了一些基本概念，我尽量列出来：
1. Q:A FET in common souce, the voltage on load is in phase or out of phase
of input signal?
A: out of phase.
Q: How many degree?
2. where is 0Ohm, 50Ohm, 25Ohm on smith chart.
3. How to match from 25 Ohm to 100 Ohm with inductor and capacitor
4. How to match from 25 Ohm to 100 Ohm with a piece of transmission line.
5. The advantage of Clas |
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j***j
发帖数: 324 | 48 transformer or inductor.
change another one. |
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w********u
发帖数: 90 | 49 可以试试，分立器件，很多东西都可以实现，比如大的inductor ,cap, resistor. |
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f*****0
发帖数: 489 | 50 if you read the datasheet more carefully, you will know that the Vout pin on
the chip isn't to output voltage. the schottky diode / capacitor is. read a
little bit more about boost converters and you will understand why.
yes, if you the CE pin low, it would disable the chip (which by the way is a
PFM chip, good for low-load or standby situations). When that happens, the
LX pin is left float and the current will flow from Vin to Vout through the
inductor and the schottky diode. So the rough volta |
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