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thanks..i just find it so strange that not only THD but also HD3, they does not behave the normal way, i mean normally, the third harmonics increase faster than signal amplitude when increasing the input signal, so HD3 should decrease till 0 with increasing output amplitude(so called IIP3...
i really mean 100uv, 10uv is even worse..
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thd(VT("/vout+") 2m 8m 1024 1000 )
i use the above calculation in candence, 10ms is transient simulation time, i pick up from 2m to 8m , and 1024 samling points, 1000 is fundamental frequencym, anything wrong? i see that when...
i did the THD simulation using cacence, i find that with a from 1mv to 10mV input , i find the THD result to be 1.3e-02, with a 100uV input, i get the THD result 3.7e-1. so my dynamic range is only(1m to 10m) 20 DB when THD=1%??
I have finished designing switched capacitor filter with ideal Opamp, now i am gona to design a real opamp for it, however, i have no idea how to determine the slew rate and GBW..
thanks
THD is simply the power ratio of the higher order harmonics to all the harmonics?harmonics over harmonivs?
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THD is simply the power ratio of the higher order harmonics to all the harmonics?harmonics over harmonivs?
i want to design a low noise fully telescoic opamp, the low noise is very important, so i must design it from noise equation, i know how to design the input transistors and load transistor, only that i have no idea to design the two pairs cascode transistors in order to minimize the whole input...
yes , i have this requirements. i need to do a perfect thesis on linearity..
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i think may be the difference between the worst gain due to distortion should not too large, but how to define it...
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i think peple may often use dynamic range when...
hi guys, i am somehow confused, i don't have a feeling for THD, i asked a tutor of me, who told me that the linearity, he said that the linearity of large signal is the dVout/dvin vs vin, when no distortion, the y axis will equals to gain..
it´s just the professor has been telling me that gm c filter has a really bad linearity, which degrade the whole system a lot, so i need to find out this parameter, therewith i determine whether it fits my design or not..e.g the input signal ranges from 50uv to 5mv, so he told me that ,my...
as asked in the topic, i have no idea how to define the linearity of amplifier and how to simulate it ?i am doing a Gm-C filter in my master thesis, the linearity of which is very important for me to know...I have summit thesis soon, i hope someone could help me with that, thanks a lot.:cry:
i see ur message,u need to find out the gm id curve right?this is only a usefull table for designing OTA,u need to find gm id curve for the transistor of CMOS technology u are using.
firs ,build a simple single transistor circuit,and then set the Vgs of a transistor as a variable.and then do the...
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