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32 Threads found on edaboard.com: Sige Cmos
In which technology are today long and short distance wireless devices made ? cmos integrated circuit or what ? Depends. RF circuits are mostly made of GaAs and sige, other circuits are cmos. High-power devices are often made of GaN. There are many technologies by many makers.
For any amplifier (GaAs, cmos, BJT, sige, etc) the 10dB difference rule between IP3 and P1dB is valid ONLY if the amplifier has proper bias termination and filtering at frequency equal to f2-f1 in a two-tone test.
BJTs at voltages over about 5V BVceo will be faster than a MOSFET of equal BVdss, provided you stay out of saturation. When I first started designing ICs, early '80s, I was doing single (bipolar) transistor logic, Schottky clamped, and it ran rings around the cmos of the day (~ 1.5um, 5V). Even today a sige HBT that is matched to its (...)
Why is the work function approach necessary for Vt adjustment in scaled technologies? What is a FUSI process? How does nitrogen and other doping schemes help in adjusting the work function? What are midgap metals? What are the issues with midgap metals in the Vt adjustment of n-MOS and p-MOS, poly sige gates, future directions of this researc
The processes you mentioned are sige, not cmos. The cmos 130nm kit from IBM is 8RF. See IBM 0.13 Micron 8RF-DM Process I think I misunderstood, I was looking at core voltages not I/O. For 1.8 V I/O try IBM 65 Nanometer 10SF Process IBM 65nm
Any technology, sige, cmos, pHEMT ... Frequency > 500MHz, any frequency range Vdd <= 5V Idd <= 10mA Gain >= 15dB Stable NF <= 1dB Input IP3 > 10dBm <-- must have Return loss (in, out) < -10dB Data sheet, application note, paper ... are welcome basically I am looking for a low power high linearity LNA. I am wondering
most of this range are GaAs and sige but there are research efforts on UCB and many placesto make 60 GHz cmos Khouly
What do you think which the best book (or article, tutorial...) is in the field of sige RFIC design?
Can you clear up some thing. Are you talking about Process/technology: MOS, cmos, Bicmos, sige.... Or BJT's vs. FET's ? Are you assuming highest frequency to be amplified is your merit of Speed, (Frequency response of the device "S21") or How fast the device can transition from a Low to High state is your merit of speed? (Max (...)
which process you are interested GaAs HBT, HEMT or sige or cmos!!!
sige RfF LNA
Hi People, I would like to know why sige process is expensive compared to cmos process? In what way they are different which make the price of fabrication to differentiate between them. Thanks. Anachip.
What're the difference between Bicmos and sige? Are they identical? Mesfet+
Bicmos sige
Hello, Looking for information on sige Bicmos and cmos 60GHz Radio Building Blocks and Systems at the circuit, system and device levels. Please send any information ! Thanks.
It depends on what kind of technology you will choose. Here are two reference papers who are both wideband LNAs for UWB, and one of them are cmos and the other sige Bicmos. 1. Ismail A,Abidi A.A 3 to 10GHz LNA using a wideband LC-ladder matching network.In: ISSCC,2004 2.Bevilacqua A,Niknejad ultra-wideband cmos LNA (...)
hello i need references (books, papers, thesis) on integrated mmic/rfic transformers for gaas/cmos/sige. please help. thank you.
In sige and GaAs technology 'gm' and 'ft' is higher than the cmos question is.....what are the advantages having higher 'gm' and higher 'ft'?
If you compare 3 (4) terminal devices the product of current gainbandwidth and the breakdown voltage is important. For MOS devices you get about 70-100GHz*V. sige Bipolar is about 2*3 times higher. GaAs a further factor of 1-1.5. MOS have the additional disadvantage that the above speed is only true if the saturation voltage is very high. Tha
sige has lower flicker noise contribution to close-in phase noise.
4) how to compensate the gain variation for the temperture , process voltage variation? I design the sige LNA before and use PTAT/Bandgap combine current, how about the cmos, should I use constant-gm, or PTAT or combine both? 5) about the bulk connection, because in my project, there is no trple-well device, so should I use seperate pin fo
sige is a Bicmos technology. So, you have the option to use bipolar transistors ( vertical bipolar transistors ). Usually, these BJT's have a much higher fT ( maybe an order of magnitude higher )than the cmos transistors so they can be used for higher frequencies. I don't think there is a special consideration. You just have the option to (...)
cmos process is cheaper comparable with others (GaAs, sige, etc). A cmos PA can meet in some limits the same performances with competitors. Nobody wants to make a cmos PA with poor performance. Just cheaper.
Is it hard to move from GaAs Power Amplifier / Front End Module Design to RF IC Design in Silicon (cmos, sige) if you have the right course work (RFIC Design, cmos Analog Design). Any tips or suggestions? Many friends of mine want to make this transition.
The future is in cmos! If it's true that some companies are having troubles with pure cmos, it's also true that the RF is always driven by baseband capabilities. Now we are in a phase where Bicmos (mostly 0.35,0.25 and sige) is the must if you want product today. I am designing using it. The future (the open question is (...)
hello i need information on linearity vs. feedback tradeoffs in mixer and LNA design and NOT power amplifier design. thanks (si bjt, sige, cmos)
Right now, the chip market is down. In MMIC, LMDS and MMDS both went nowhere. Auto Collision Radar has been in the works for years. They are working on 60GHz cmos and sige Wireless LANs. Is this all necessary ? What COMMERCIAL applications will drive both RFIC and MMIC design in the future ? Which technology will win out ? sige ? (...)
How can I acquire sige's design kit?
Can I make PA in TSMC 0.18 cmos? or I have to use a diffrent process? Like sige bicmos?
I am learning analog/rf design and need a BJT model and a cmos model to run my circuits under Spectre(RF). Something close to IBM's sige processes is even better. The models do not have to be accurate and realistic, as I am not designing chips at this time. I know most (if not all) models and design kits are available from moses.com, but they ne
Hi all, where can I get TSMC 0.25, 0.18, 0.13 and/or IBM sige design kits?
Hi, I am defining the specifications for a new RF IC. What is the procedure that I should follow? 1) Define all the functions ( Direct down conversion or two stage down conversion, ADC, LNA (NF, gain,... ) Digital Functions) and then the architecture and process OR 2) Fix the process (cmos, sige,...) and architecture and see what functi