单反相机LCD，怎么清洁？# PhotoGear - 摄影器材
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【 以下文字转载自 EE 讨论区 】
发信人: freetofree (Try&Try), 信区: EE
标 题: Apple RFIC interview
发信站: BBS 未名空间站 (Tue Sep 24 17:03:34 2013, 美东)
Apple RFIC is hiring. I did not get an offer. Here are the interview
questions. Hopefully they are helpful for you.
I'm not sure apple is doing wifi or not. Currently they are using other
companies' chip. But definitely they want to do some work.Maybe for
customized low power
wireless chips
Here's are the questions:
1, How to design an LNA, how to improve linearity? how to reduce NF?
A: high vov, gm3 cancellation ,feedabck etc. high ft, noise cancellation,
higher current etc.
2, MOS transistor noise
A: thermal noise, gate induced noise, flicker noise, shot noise
3, which parameter is related to gate induced noise? how to reduced rg?
A: Cgs, smaller w
4, why blocker increases NF?
A: 1, saturate the font end, reduce gain
2, intermodulation, cross modulation,
3, reciprocal mixing
5, IM2 impact of the Rx. He will ask two tones spacing at 1MHz. Then you may
be asked IM3 or IM2 matters?
6, PA design
A: load line method, load pull etc
Above are the phone screening questions. I will upload the full interview
questions and answers if you are intersted
发信人: freetofree (Try&Try), 信区: EE
标 题: Apple RFIC interview
发信站: BBS 未名空间站 (Tue Sep 24 17:03:34 2013, 美东)
Apple RFIC is hiring. I did not get an offer. Here are the interview
questions. Hopefully they are helpful for you.
I'm not sure apple is doing wifi or not. Currently they are using other
companies' chip. But definitely they want to do some work.Maybe for
customized low power
wireless chips
Here's are the questions:
1, How to design an LNA, how to improve linearity? how to reduce NF?
A: high vov, gm3 cancellation ,feedabck etc. high ft, noise cancellation,
higher current etc.
2, MOS transistor noise
A: thermal noise, gate induced noise, flicker noise, shot noise
3, which parameter is related to gate induced noise? how to reduced rg?
A: Cgs, smaller w
4, why blocker increases NF?
A: 1, saturate the font end, reduce gain
2, intermodulation, cross modulation,
3, reciprocal mixing
5, IM2 impact of the Rx. He will ask two tones spacing at 1MHz. Then you may
be asked IM3 or IM2 matters?
6, PA design
A: load line method, load pull etc
Above are the phone screening questions. I will upload the full interview
questions and answers if you are intersted
