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-What kind of resistors ( if any) you are using. Is this the best tolerance you can use?
I am using TSMC18rf, and rphres as the resistor. This type is the best tolerance over temperature (within 5% over -40~85°), but still have about ±12% variation over process.
- Can you use Bandgap voltage in...
Hi, all.
I am now designing the RF front-end for 2.4ghz band, including a LNA and IQ mixers. By using gm-constant biasing for LNA and mixers, there is still about ±1.5 dB variation in voltage gain over -45~85 ° temp variation in a given process corner, and can be up to about ±3dB gain variation...
Hi, all.
I am now designing the RF front-end for 2.4ghz band, including a LNA and IQ mixers. By using gm-constant biasing for LNA and mixers, there is still about ±1.5 dB variation in voltage gain over -45~85 ° temp variation in a given process corner, and can be up to about ±3dB gain variation...
icfb tool
I have installed icfb 5141 on my laptop. But I found some differences from the ICFB that I used before, and I think it must have something to do with setup.
such as: when I use schematic composer, I want to draw a wire. Press "w" will popup a interactive window, showing wire's...
Re: "device or resource busy. " Cadence simulation
Thanks hqqh.
I checked the icfb version, ic5.10.41_USR3.27.30, to 2005. Is this version older than IC5.1.41.500.3.54?
cadence device busy
am using a network enviroment in simulation, that is, all the user files are located in a fileserver, while the cadence main programme is located on another server.
There is no problem when I run the simulation first time, but when I want to simulation again icfb will tell...
cannot remove .nfs device or resource busy
I am using a network enviroment in simulation, that is, all the user files are located in a fileserver, while the cadence main programme is located on another server.
There is no problem when I run the simulation first time, but when I want to...
I am using a network enviroment in simulation, that is, all the user files are located in a fileserver, while the cadence main programme is located on another server.
There is no problem when I run the simulation first time, but when I want to simulation again icfb will tell me " *error*...
With decreasing L, γ in channel thermal noise formula increased to about 2~3. However, we don't know the γ value in SpecteRF simulation. If simulation tool uses BSIM3 model, the thermal noise model based on inversion channel charge is used, and no parameter like γ can be found.
So the problem...
match maybe first important in blocks that directly connect to board, such as LNA. matching methods are depending on your applications, wide-band or narrow band. If narrow band, L can be used because its tune facts and will also improve noise figure. As for wide-band, common-source with L...
Re: What kind of information need be drawed in the schematic
max current over process, temperature, voltage corners
matching
key routing, parasitics, especially in high-frequency application.
Maybe common-source and common-gate with same amplfication factor can be used, one is positive gain, the other is negative gain. The problem is to ensure that two circuits provide same abosulte gain. Just an idea:D
The traditional is single-conversion with IF at about 36MHz, and a on-board RF bandpass tracking filter is a must. This is called can tuner. Although it's bulky compare to the emerging silicon tuner, can tuner can provide better performance, such as sensitivity, image rejection, etc. But silicon...
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