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Harmonic Distortion Simulation

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36 Threads found on edaboard.com: Harmonic Distortion Simulation
in my opinion, if u only are only careing about the switch's linearity, u can build a ideal switch and then compare the result of S/H with ideal swtich to the S/H with real switch. i think u will do FFT for the output of S/H to see any harmonic through the S/H network.
can someone tell how to do simulation in SPICE to calculate harmonic distortions in an opamp.
I just do the simulation with a MOSFET, and the vds=0. Add a Sinusoidal Source to the drain of the MOSFET and do the harmonic distortion. Please see the attachment to get the details. Thanks a lot!
Dear All, thank you for reading this topic. I just design an OTA and I will conect it to a capacitor to build a lowpass filter. Then I will put a 100mV sine signal at the input and want to see the harmonic distortion at the output. Does anyone show me the procedure that how can I get the result? A sample is put in the attchment and that is what exa
hi presently i am worlking with Mentor graphic ELDO Spice for analog circuit simulation.for measuring specification of my amplifier i have to measure harmonic distortion(HD). i dn't know how to measure HD of a wave form by using EZ wave calculator of the mentor graphics .please guide me. Rgds Raju
Hi everybody, I'm having a little troubling simulating the harmonic distortion for a MOSFET differential amplifier with ADS. I am trying to calculate HD2, HD3, and the point at which the apparent gain drops by 1dB all for a 50mV signal at 100 MHz. I set up the circuit and added the harmonic Balance simulation block and set (...)
hello friends So far I was enquirer how to simulate or calculate the SNR. Now I would like to ask you how to simulate the THDN (total harmonic distortion plus noise) of the operational amplifier. Thank you and I appreciate very much your answers
Hi everybody: I want to simulate the THD(harmonic distortion) and equivalent input noise of a opa, but how can I do it? thank you for your help.
Hi all, I'm starting a transconductor design using 0.13u CMOS, and I'd like to estimate the distortion, so I started to simulated the transistors. I apply a constant Vds, of 0.05V and I vary the Vgs to plot Ids, the gm, gm' and gm''. I assumed I~gm*Vgs+1/6*gm''Vgs^3, and tried to check with distortion simulation. I used the QPSS analisys (...)
Hi, I'm designing an op amp and want to calculate the HD3. The input signal is 1KHz. I found that there's a "dft" function in the calculator. But how to set the variables in it? ("from", "to" means what?) And how to get the HD3 from the dft result? btw: how long should I run the transient simulation to calculate the HD3? Thank you for your
hello all, i have designed a 10 bit ADC and i would like to simulate the major ADC characteristics.....but my knowledge in simulation of ADC characteristics is quite limited.......the characteristics i want to measure are the following: 1-DNL 2-INL 3-input offset voltage 4-Total harmonic distortion 5-Spurious Free Dynamic Range (...)
i am not sure but i think when they say HD they mean the harmonic(mul;tiples of fundemental) distortions and when they say IMD they mean non-tones distortion (non-harmonic distortion)
hi all i'm designing a S/H circuit using K. Haug's narrowband-compensated SC amplifier. i want to attain 120dB SNR, but the third harmonic distortion is very large, even though using ideal opamp, i don't know why. input signal 5kHz sinewave, sampling frequency 1.6MHz
Hi, guys, How to simulate the total harmonic distortion (THD) in Cadence Spectre simulator? Many thanks, Ruri
Hi,everyone! I have a quesition about Cadence: I do not kown the difference between the component parameter sweep and model parameter sweep and how to use Cadence to test total harmonic distortion(THD)? thank you very much!
I'm trying to simulate a Class D amplifier with hysteretic self-oscillating modulator but the PSS simulation is not acepting the configuration. Basically the self-oscillating system frequency (fs around 500 KHz) will be modulated by an audio signal (fin around 1 KHz) and fs will be varying from 450KHz to 550KHz but in a non-linear fashion since
No, you do not any easy alternate. You need to have model for that. Can you share the circuit you want to simulate, may be seeing that people comment on possible sources to introduce harmonic distortion in simulation.
thank your for your tips. I have noticed the spectrum leakage phenomenon, but so little help occured. another phenomenon in FFT analysis (Hspice): for a high gain amplifier (about 60dB), the input signal amplitude is very small. when doing fft analysis, the results indicate that the harmonic distortion will be improved with the increasing input
My question is how to extract the nonlinearity of a Gm-C integrator, i.e. THD (total harmonic distortion). SNR (Signal-to-Noise Ratio) and SDR (Signal-to-distortion ratio)? As my knowledge, these perforamnces are from the FFT of a signal. Does it need a tranisent simulation??? In some literatures, the performances (...)
My question is how to extract the nonlinearity of a Gm-C integrator, i.e. THD (total harmonic distortion). SNR (Signal-to-Noise Ratio) and SDR (Signal-to-distortion ratio)? As my knowledge, these perforamnces are from the FFT of a signal. Does it need a tranisent simulation??? In some literatures, the performances 1dB (...)
hello all, i have designed a 10 bit ADC and i would like to simulate the major ADC characteristics.....but my knowledge in simulation of ADC characteristics is quite limited.......the characteristics i want to measure are the following: 1-DNL 2-INL 3-input offset voltage 4-Total harmonic distortion 5-Spurious Free Dynamic Range (...)
I am designing a 10bit pipeline ADC. The schematic simulation shows that the odd harmonics are too large(especially,the third harmonic is 55dB). Can anybody give me some suggestion on how to find the reason? Thanks.
The harmonic may stem from the INL of the ADC. usually, INL manifest itself as harmonic distortion in the ADC (it's frequency depends on the INL graph).
i think u need also to enter the SOI like the TOI , so SOI will make the even harmonics generated khouly can u upload the project khouly
I am designing an opamp used in 20bit codec. But I do not know to set the parameters correctly to get the right THD (Total harmonic distortion). The spec requres the THD<-90dB. But the THD function applied to the output of spectre can only get about -47dB even the waveform is the idel sinusoid generated by the sine source. Can anyone give such a s
AC amplitude and AC magnitude are physically the same thing. Distinction is made by simulation programs when running AC or transient analysis respectively. In AC analysis the circuits characteristics are being linearized around the DC operating point and AC amplitude is used to calculate the outputs in the frequency domain. In transient analysis th
At higher frequency, THD increases due to many reasons. Most important is switch nonlinear ON resistance. This harmonic distortion increases the SNDR of the ADC. And as you might already know ENOB=(SNDR+1.76)/6.02. So, SNDR decreases, ENOB decreases.
I want to optimize a model in ads using the measured nonlinear distortion data. In HB simulation environment, I can not find ways to write the measured distrotion data such as harmonic distortion and intermodulation distoriton into the goal function. Could anyone give me some guidance to solve this problem? Thanks in advance!
Hi samiran_dam, (1) If you like to visualize linearity/non-linearity you could do a dc analysis in order to evaluate the transfer characteristic (input-output relationship); (2) If you like to quantify the degree of non-linearity (which is expressed as total harmonic distortion THD in %) you must do a TRAN analysis using a clear sinusoidal inpu
So the 2nd order products typically show up at baseband (f1-f2) or at the 2nd harmonic. You need to look at the system requirements. For a superset receiver, generally 2nd iip doesn't cause a problem because bothe of these are filtered out. For a direct conversion receiver design, you need to look at dc offset requirements for the arc. Dave
You wouldn't really put in a tone at 20MHz because this would be an alias into your baseband. So you should put something into your converter at say 9.9MHz. You also want a tone deep inband to include any harmonic distortion so you can measure you SNDR and SNR. also so your simulations don't take to long, you should integrate your noise (...)
ASR ADC Segmantation msb 6bit with CAP binary weighted, lsb 6bits thermometric resistor ladder data rate 2Mbps, 28Mhz clock. continuous-time comparator(signle stage opamp) with two cascade satges used autozeroing technique for offset cancellation(with i/p cap of 100f/500f) when i run enob simulation only with real comparator and everyt
i want to calculate total harmonic distortion using fft of supply voltage..plz can you help me out with how to use the fft to calculate magnitude of voltages at harmonic frequencies and then find out the thd.
maybe you need a scirpt to add all the pin's power except harmonic~ also use tools, like the spiceexplorer(a small waveform software), it supply the function of FFT/DFT and SNR,SFDR calculation how to do this? can you tell me the details? u can also get snr value in frequency domain. don't include hamonic pow
Hi reading through the paper attached one might find out that Voltera series simulator is indeed nonlinear simulator, but not time domain. It is working in frequency domain. It is used mainly for weakly nonlinear circuits, e.g. to calculate intermodulation in almost linear amplifiers (LNAs) etc. This is the area where convetional harmonic balanc
Thanks everyone give me so good explain. I have do the simulation that Kral and zeeshanzia84 advise . In time domain , I can see the distortion when phase have difference each of them in fundamental and 3rd harmonic. In spectrum domain, there is no difference when phase have large shift or small shift or fundamental shift x degree (...)