11 Threads found on edaboard.com: Thd Measurement
Good day, everyone.
I have a question regarding understanding of the Total Harmonic Distortion (thd) and why is it a good merit for signal distortion measurement.
With the FOURIER Transform (let?s talk only about DFT) we can decompose any signal into sinusoids of different frequencies, phases and amplitudes. That means that any signal can be
Digital Signal Processing :: 11-04-2015 08:38 :: Onedust :: Replies: 10 :: Views: 479
thd measurement is used to analyze AC signals. I think you dont need thd measurement because your output is DC. You just need to meter output voltage ripple. This measurement will show u quality of the SMPS output. Your output will be DC + AC(ripple). So your main signal is DC and some AC ripple. You dont (...)
Power Electronics :: 07-23-2013 06:22 :: fethiyeli :: Replies: 4 :: Views: 1078
Almost all literature refer to compression point and intercept point measurements in terms of input&output power.
When simulating a simple 2stage opamp, that has been designed to drive a capacitive load, how do you setup the simulation for input & output power ?
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 10-31-2011 06:32 :: fassage :: Replies: 0 :: Views: 848
This is another method:
If you can measure the total power (usually this is done in time domain) and the dc and 1st (funtamental) components, you have
Harmonics_power = Total_power - DC_power - Fundamental_power
It this way, in theory all harmonics are included. The problem is that in the case thd is low, as this is calculate
Elementary Electronic Questions :: 05-17-2011 21:53 :: zorro :: Replies: 2 :: Views: 999
fundamental, pure sine wave= 50hz
2) harmonics injected= 100 hz ( ie, 1st harmonic) ( harmonics is the integral multiple of fundamental wave)
then we add both pure and harmonic , to get combination = distortion ( shown in gragh as combination)
then we pass through filter, and reproduce pure sine wave.
now here,, next step is to find out
Power Electronics :: 04-06-2011 02:32 :: rashmi venugopal :: Replies: 1 :: Views: 713
You don't measure the input power. It's actually V1*I(V1).
As a hint: You can also determine the power factor from an I1 fourier transformation respectively thd measurement.
Analog Circuit Design :: 08-04-2010 10:00 :: FvM :: Replies: 3 :: Views: 1314
how can i measure HD3 ,thd, IIP3, IIM3 using cadence analog environment for cmos ota design
please reply soon......its urgent
thanks in advance :)
Analog Circuit Design :: 03-15-2009 12:05 :: shweta_eda :: Replies: 4 :: Views: 1993
hi can anyone give me some reference books or examples?
Analog Circuit Design :: 04-09-2007 20:25 :: zxasqw123 :: Replies: 0 :: Views: 1285
I am trying to measure the above mentioned dynamic specs of an ADC in Spectre. My ADC is a pipelined, 8-bit and operating at 80MSPS. What i am doing is giving a sinusoidal input of 9MHz and sampling frequency of 60MHz. The input frequency i decided using fin/fs=Mc/M formula. I am using transient simulations with strobestart=1/60MHz and strob
Analog Circuit Design :: 03-06-2007 00:42 :: vijay_nag :: Replies: 14 :: Views: 11661
There are several ways to measure the SHA in the lab:
1) Direct measurement: if your SHA can drive 1Mohm impedance, then you can hook up your SHA to the spectrum analyzer and measure the thd, SNR, etc;
2) Indirect measurement: have another ADC with higher accuracy and higher bandwidth. But you need to be careful about the possible (...)
Analog Circuit Design :: 03-31-2006 13:37 :: willyboy19 :: Replies: 3 :: Views: 809
this link is reference to the subject of this post, I interesting in any document that learn in how to measure and testing the amplifiers like IHF (Institute of High Fidelity) , Power, thd, TIM, frequency response, etc..... any information is welcom org is dedicated to te
Analog Circuit Design :: 05-20-2004 01:19 :: MCMC :: Replies: 0 :: Views: 1175