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Quadrature system noise
Hello all ,
how i can measure noise of a quadrature system refering it to single source at input and single source at output.
Best Regards,
Thanks alot, but the problem not in input really in recognizing output
I do the following expression and i can see the output in a nice way
Out= sqrtabs(outI+sqrt(-1)Outq)
so i can see the output correctely. really the problem in measuring noise i have to define single node for output
for...
Hello All,
I'm designing a polyphase filter (i have designed multi section to creat many notches ) such that i get it functional over certain band.
Can any one tell me how i can measure its frequency responce.
Advanced thanks,
Hello All,
I am designing a CT sigma delta modulator i am a little bit confuse about transalting the system coefficient calculated in matlab to circuit parameters are we in need to multipy by a factor 2*3.14(pi) or not.
for coefficient a1 for example to calculate equivalent RC rime constant in...
excess loop delay
Dear All,
i am modeling a CT delta sigma modulator using simulink , now i am trying to model excess loop delay .
I try two methods:
1. use a transport delay but it the delay appears as an increase in the rise time not a delay in the output signal of this block.
2. a D-ff...
Cascading biquad filter
Hello all,
I'm designing a fourth order filter by designing 2 biquad filters in cascade . can any one tell me how i can calculate the effective frequency band wo of the filter and also the effective quality factor Q based on wo, Q of each biquad section.
If there is any...
hello,
you can recognize that from plotting frequency responce magnitude and phase for pole in RHP( right half plane) you reconize increase in phase for pole in LHP (you recognize decrease in phase.
and the opposite case for zeros.
Best Regards,
Dear All,
Can you help me to get this thesis:
R.H. Allen, “Complex Analog Filters Obtained From Shifted Lowpass Prototypes”, M.A.Sc., Toronto, 1985
Advanced thanks,
Dear all,
Can you tell me how i can extract the poles postion of the filter frequency response from an ac response i got from cadence in matlab such that i can define parasitic poles position.
I try this process using curve fitting in matlab for custom equation (filter equation) but it gives...
Re: symbolic polynomial
Thanks alot,
I try it but the solution is no longer simplified and i try simplify and pretty function in matlab but still solution not simplified can you suggest me away to get readable form for the solution.
Regards,
Dear All,
I want to solve a symbolic polynomial with complex cofficient and find its roots in terms of symboles
example:
(((s-I*w)^2+g1)*((s-I*w)^2+g2)+(a1+a2*(s-I*w))+(a3+a4*(s-I*w))*((s-I*w)^2+g1))
Where I=√-1 and g1,g2,w,a1,a2,a3,a4 are symboles
and i want to solve this equation in s...
Re: Fully differential op-amp-----Requesting for Urgent Help
I think Razavi book will be useful check chapter 9 it's about operational amplifier design.
sigma delta adc bandpass
hi all,
Hoping anyone can help me to get this thesis:
H. Tao, “Frequency translating bandpass sigma–delta modulation for. analog-to-digital conversion,” Ph.D. dissertation, Columbia University.
i find it in columbia University library but it requires user name and...
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