y***q
发帖数: 98 | 1 We are seeking highly motivated individuals for one or more postdoc posi
tions available immediately. Applicants should have strong background in
one of the following areas: epitaxial growth (MOCVD and MBE) of semicon
ductor materials (II/VI and III/V), processing and testing of optoelectr
onic devices (lasers, photovoltaics, and detectors). Application should
be sent directly to: Prof. Yong-Hang Zhang at:y*****[email protected]. |
|
v***o
发帖数: 287 | 2 air ductors
800-970-3828 |
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l********i
发帖数: 115 | 3 I had it done by air ductor. it is in BBB
more $ than others, but they did a good job. I think $10 per vent, plus $65
for furnace check up. |
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G******t
发帖数: 1782 | 5 谢谢楼上诸位。
马利村的Air Ductors也不错，价钱也公道，
就请他们了。 |
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l****b
发帖数: 44 | 6 Just had Air Ductors yesterday. Not bad! |
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f******n
发帖数: 198 | 7 i used Air Ductors last month. It was quite good. Don't forget to ask about
cash-only discount. |
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ET
发帖数: 10701 | 8 理论上是这样(或不是这样），但只是定性的描述。如果这样解释，voltage mode和cur
rent mode就没区别了。
另外，以你这样的解释，是谁控制谁的问题了。首先，peak current是哪来的？ peak
current是根据需求的output, 折算出的duty cycle，还有设定的current ripple， in
ductor确定的。 根据这些来设定稳定态的duty cycle. 这个peak current都是事先设定
了.
比如给定vg, ig, 要求弄个vout, iout(rms) = vg*ig/vout,
再说我可以有50%的ripple. 那么peak current就是iout(rms)+/ 25% iout(rms).
可问题是，current mode 和voltage mode都在的时候，output voltage 经过error am
plifer后的输出， vcontrol, 设定的peak current.
剩下的部分我就不明白了。
it
qua
up |
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y***q
发帖数: 98 | 9 We are seeking highly motivated individuals for one or more postdoc posi
tions available immediately. Applicants should have strong background in
one of the following areas: epitaxial growth (MOCVD and MBE) of semicon
ductor materials (II/VI and III/V), processing and testing of optoelectr
onic devices (lasers, photovoltaics, and detectors). Application should
be sent directly to: Prof. Yong-Hang Zhang at:y*****[email protected]. |
|
y***q
发帖数: 98 | 10 We are seeking highly motivated individuals for one or more postdoc posi
tions available immediately. Applicants should have strong background in
one of the following areas: epitaxial growth (MOCVD and MBE) of semicon
ductor materials (II/VI and III/V), processing and testing of optoelectr
onic devices (lasers, photovoltaics, and detectors). Application should
be sent directly to: Prof. Yong-Hang Zhang at:y*****[email protected]. |
|
