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Hi, everyone,
My cadence version is IC6.1.7 and MMSIM version is 13.1. I am using VCVS as delay unit (I know there are some delay component in analogLib like delayline, but there are some other strange phenomena).
The testbench and simulation results are shown in the following figures. The...
hi ,everyone
I am using IC610 and MMSIM13.1. I want to observe jitter of a PLL output. And I used eye diagram assistant in VIVA to process the PLL output .But I got two totally different eye diagram.one is obtained by edge triggered and the other jitter is small .But the other is large
I have...
sarge,thank you for your response ,but the name structure of mos transistors is irregular.I guess dick_freebird's answer is great,maybe i could use hspice to do it
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erikl,thanks again for your reply ,but i do not get it. i guess...
erikl ,thank you for you response .sorry,maybe i do not explain my problem clear.my code is blow,
ocnWaveformTool('wavescan)
simulator('spectre)
design("~/netlist")
resultDir("~/schematic")
modelFile('("~/eda/sms.scs" "tt"))
analysis('dc ?saveOppoint t)
temp(27)
run()
plot(OP("/M0" "gm"))
for...
hi eyeryone,
i am using IC 615 and MMSIM13.1. i am going to save all mos opertion point to a file with ocean.I know that i could save single mos op with a expression like op("/M0" "vds"),but there are a lot of mos in my schematic.So which expression i should use? i have tried op("/*"...
hi,everyone
how to choose diode area for ESD protection?For example ,if i want to pass HBM 2kV and the transient maximum 1.33A,how much area could withstand such a big current? Are there other factor should be considered when choose diode area?For example diode technology as below
Thanks...
hi,all
I have read the file "Predicting the Phase Noise and Jitter of PLL-Based Frequency Synthesizers" ,which i download from this forum.
I can calculate the period jitter by the matlab code on page 46,but I do not know how to calculate phase jitter using matlab.
Could anyone help figure it...
hi, everyone
i got a few questions about a PLL datasheet.The image is part of datasheet
1.what's the difference between average period and absolute min period
2.what's the difference between rise time and rise time variation
Thanks any help in advance
I do not have the datasheet of crystal and do not know what kand of brand it is. But there is "49.152" carved on the package.
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I do not have the datasheet of crystal and do not know what kand of brand it is. But there is "49.152" carved on the package.
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Hi ,everybody
When I used a crystal of nominal frequency at 49.152M and two capacitance with a chip to form the pierce oscillator,is oscillates at 16.3M. It is weird. Inverter and the bias resistor has already integrated in the chip. I used two different types of oscilloscope with different...
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