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mesfet cadence spectre
I think I will give it a go with both the ac voltage source and see what comes of that it is more intuitive and will probably lead to fewer issues with simulation. The reason I need to find ft is because the unity gain frequency can then be used to properly select a...
measure ft cadence
Thanks. The ac voltage approach is a bit unclear because I am looking for current gain. You could get ioutput/vgs and then divide the result by (Cgs+Cgd), not exactly sure how exact that approach especially over a large frequency range. I may end up doing this or perhaps...
transit frequencey cadence parameter
Thanks for the insight. You are correct, the voltage source actually should have been in series. There was another issue in that the software when running a DC operating point analysis essentially set the gate to 0 V, regardless. I used a convergence aid...
cadence + unit current gain frequency
Hello,
I had a basic question about simulating the short circuit unity gain frequency of a mosfet.
Attached you can see the simple schematic. I have supplied a dc voltage bias of .9 volts, and an input current source with an ac magnitude of 1 and a dc...
Hello,
I am designing a charge-pump for implementation in a CDR, the output of the PFD is based on CML logic, in order to incorporate into a standard differential charge-pump similar to those outlined in Lee's and Razavi's texts, does the swing need to be converted to a logical one? Further in...
evaluation error(unknown scalar data type: nil)
Hi,
I've had this problem for quite some time now, but for some reason I don't know if it is my installation but I cannot get transient current or dc current to appear though transient voltage shows up fine.
The format for obtaining VT or VDC...
I also posted this in the Analog IC forum, but perhaps I could get some more feedback from others if posted here:
I am interested in RFIC, perhaps someone that has experience could share some light on what some good research topics might be in terms of meaningfulness in industry today noting...
I am interested in RFIC, perhaps someone that has experience could share some light on what some good research topics might be in terms of meaningfulness in industry today noting that the masters dissertation would be a commitment of a year and a half only.
Re: PLL's Filter Design
Another good resource is "CMOS PLL Synthesizers: Analysis and Design" by Sinencio. The filter is not very trivial. You should read some basic texts at the least like Razavi's (Design and Analysis of CMOS Analog Circuits) book, there will always be tradeoff between the...
lc vco adrian maxim
D. Ham and A. Hajimiri, "Concepts and Methods in Optimization of
Integrated LC VCOs," IEEE Journal of Solid-State Circuits, vol. 36, no.
6, pp. 896-909, June 2001.
D. Ham and A Hajimiri, "Design and Optimization of a Low Noise 2.4GHz
CMOS VCO with Integrated LC Tank and...
pll high speed
Hello,
Any help below would be much appreciated.
I am implementing a PLL (Frequency Synthesizer), the output of the VCO is to be 26 Ghz and the input is 812.5 Mhz. I plan to use a couple of ILFDs and a static divider. I am implementing the following CML logic style static...
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