1000 Threads found on edaboard.com: Thd Measurement
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: 1701
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: 509
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
Electronic Elementary Questions :: 05-17-2011 21:53 :: zorro :: Replies: 2 :: Views: 803
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: 1046
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: 719
i am writing a code for measuring thd(total harmonic distortion) in a three phase power meter.can anyone explain what is thd and upto how many harmonics can be measured ?
i want measurement upto 41st harmonic
Electronic Elementary Questions :: 01-23-2006 06:04 :: saudrehman :: Replies: 2 :: Views: 5434
You can of course use ADS for audio amplifier simulations.
thd is the sum of harmonics' amplitudes.( Look at thd formulae)So, if you do a HB simulation, you'll find the amplitudes of the harmonics and ADS won't know how type of circuit you simulate.There is no practical difference to simulate a Microwave amplifier and Audio amplifier from aspect o
RF, Microwave, Antennas and Optics :: 04-19-2013 10:33 :: BigBoss :: Replies: 4 :: Views: 339
Hi - I'm working on an audio amplifier circuit and would really like to measure the thd+N of it. I know Audio Precision devices are one of the standard ways of making this measurement, but can anybody suggest a method of doing so using more common equipment? Has anybody had success with using a computer's sound card to do it, perhaps?
Analog Circuit Design :: 12-17-2013 17:27 :: uoficowboy :: Replies: 3 :: Views: 225
I am not sure, if the method as mentioned by erikl really works - because: Gain is defined for signals of the same shape (input and output).
And exactly THIS condition is not fulfilled if we have distortions caused by non-linearities.
If you are required to determine the non-linearity as a value you must know how non-linearity is defined (thd)
Analog Circuit Design :: 04-17-2014 10:16 :: LvW :: Replies: 12 :: Views: 438
i search for my amp project a preamplifer
circuit with ultra low thd, this circuit
are including the tone control and he
make a Vu = 10 for the amp and i will use ops. Have everyonea idea for a circuit the have a ultra low thd?
Thanks a lot
Professional Hardware and Electronics Design :: 07-05-2001 21:19 :: DarkAngel :: Replies: 0 :: Views: 1932
I need IEC 60244 (or IEC 244 or EN 60244) "Methods of measurement for radio transmitters" for review.
I dont known which part I need exactly.
Professional Hardware and Electronics Design :: 04-03-2002 07:13 :: donotknown :: Replies: 2 :: Views: 2294
im using micro-controller MSP430F1121 ,135 and 149 from TI. just now im doing current measurement for MSP430F149 with MSP-FEt430F140 evaluation kit LPM4 mode we found its consuming 5.6 to 6.3 uA current. I found that MSP430F135 consuming 5.6 to 6.3 uA current. But if Im using the same source code to test MSP430F1121 it consumes 0.1uA c
PC Programming and Interfacing :: 07-02-2002 09:20 :: niks :: Replies: 6 :: Views: 1556
Does somebody have ideas where I can get the information about eye pattern?
Professional Hardware and Electronics Design :: 07-12-2002 20:47 :: ninor :: Replies: 12 :: Views: 7735
i want to measure the inductace value.currently im trying to feed to oscillator and then measure the feq. can anyone suggest me the ckt which ll b STABLE. Let me know.
Other Design :: 07-15-2002 12:01 :: niks :: Replies: 2 :: Views: 2339
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Software Links :: 01-20-2003 00:49 :: vsupachai :: Replies: 0 :: Views: 1118
anyone have idea
Hobby Circuits and Small Projects Problems :: 01-22-2003 12:24 :: mihotron :: Replies: 9 :: Views: 3120
How can we measure the antenna gain in-house ? Assume we only have reference dipole, signal generator and spectrum available only measurement.
RF, Microwave, Antennas and Optics :: 01-26-2003 06:20 :: Rayengine :: Replies: 6 :: Views: 1363
8) SHT11 ILE SICAKLIK+NEM
Robotics and Automation Forum :: 02-02-2003 21:21 :: HN :: Replies: 95 :: Views: 73648
Recently , I begin a project for RF Impedance measurement,
Specially for antenna impedance. I plan use a wisdon resistance bridge to
measure gain&phase data.
analog device inc's ic ad8302 look like a good choose for this design,
who can give me some advice?
RF, Microwave, Antennas and Optics :: 02-10-2003 08:02 :: oven :: Replies: 5 :: Views: 2979
I need 1 chip for Energy measurement, to connect to one 51.
Or 1 circuit.
Professional Hardware and Electronics Design :: 03-06-2003 13:18 :: iberia :: Replies: 2 :: Views: 844
Phase noise and AM noise measurement in the frequency domain
RF, Microwave, Antennas and Optics :: 04-14-2003 09:15 :: HO_220 :: Replies: 0 :: Views: 1511
the attached file discribed the various type of power measurement in rf and microwave circuits.
if anyone has a new method please send for me.
in soon we will present a new method for power measurement in RF circuits.
RF, Microwave, Antennas and Optics :: 04-15-2003 10:43 :: HO_220 :: Replies: 4 :: Views: 1791
How to make a SHUNT for 5A current measurement. The application is a power meter whereby the current from a CT is 5amps and has to be fed to a SHUNT to convert to voltage for measurement by an AD77xx series IC.
I have tried using Nichrome wire but it is not solderable. Using Iron or other metals with high R, there is a problem with high tempera
Professional Hardware and Electronics Design :: 06-03-2003 05:36 :: techie :: Replies: 9 :: Views: 1596
Anybody know .... just in
Software Links :: 06-09-2003 05:01 :: textik :: Replies: 6 :: Views: 1639
I am looking for websites which have structured tutorial and/or reucational information on Instrumentation & measurement.
Robotics and Automation Forum :: 09-05-2003 00:53 :: bharundi :: Replies: 3 :: Views: 1341
hi, in our measurement sustem course, we are required to build a measurement system. can anyone help me.
Professional Hardware and Electronics Design :: 10-06-2003 04:30 :: hassnan :: Replies: 2 :: Views: 1694
I am looking for a good example doc/pdf/.ppt for taking antenna measurement with HP network analyzer.
i.e transmit/receive only with Network Analyzer
Thanks for your kindly help in advance.
RF, Microwave, Antennas and Optics :: 11-13-2003 04:42 :: edinburgh :: Replies: 1 :: Views: 1271
Does anyone have any experience with RF emission measurement from PC's? I need measurement data to 10 GHz and would appreciate any input.
Thanks in advance
RF, Microwave, Antennas and Optics :: 11-24-2003 07:54 :: Debeli :: Replies: 0 :: Views: 924
I have two questions on measurement of phased arrays.
1)How to measure the change of element's active reflected coefficient along with the scanning angles without the phased shifter?
2)How to confirm the array's phase centre?
Please tell me the solved method or commend some papers and books about it.Especially e-book:)
RF, Microwave, Antennas and Optics :: 12-10-2003 07:48 :: caocao :: Replies: 0 :: Views: 881
Moulthrop, A.S.; Clark, C.J.; Muha, M.S.; Silva, C.P."Dynamic AM/AM and AM/PM measurement Technique"1997 MTT-S Intl. Microwave Symp. Digest, Vol. 3, 1455-1458 (Denver, CO, June 8-13, 1997).
thanx in advance
RF, Microwave, Antennas and Optics :: 12-21-2003 03:41 :: e971 :: Replies: 1 :: Views: 1230
I've just started using Orcad Pspice. I create a custom measurement result in Probe but everytime I re-simulate it, I have to add that measurement formula again(I use add trace and then enter formula). Is there any way we can either enter a custom mesurement in schematic(I only use probe to probe the node) or saving my measurement (...)
PCB Routing Schematic Layout software and Simulation :: 12-25-2003 01:24 :: kudjung :: Replies: 2 :: Views: 1625
some paper about near field measurement
RF, Microwave, Antennas and Optics :: 01-13-2004 08:46 :: rebele :: Replies: 0 :: Views: 696
Has anyone ever seen a product or project converting a number of measurement data converted to a video signal? We have some measurements to transmit and video transmitters and receivers are quite cheap.
Digital Signal Processing :: 02-18-2004 19:45 :: MrEd :: Replies: 2 :: Views: 1256
I need some book about antenna measurement,NF,FF-field measurment.
who have such books,pls give me a copy!
I need them urgently!!!
RF, Microwave, Antennas and Optics :: 03-10-2004 12:22 :: romanpan :: Replies: 3 :: Views: 1070
Can anyone help me find papers, techniques used to measure precise amount of Jitter occuring in PLL.
Any help in this regards is appreciated.
Analog Circuit Design :: 04-13-2004 06:39 :: gold_kiss :: Replies: 4 :: Views: 1710
I've saw many article discuss inductor measurement and modeling.
Recently I meet problem to get a capacitance from 2-port S parameter measurement of a interdigital capacitor.
Thanks for discuss and reply.
RF, Microwave, Antennas and Optics :: 04-14-2004 22:50 :: syncmaster :: Replies: 9 :: Views: 7124
could anybody help on this topic?
The point is that i can't buy a vector network analyzer or things like that.
Any advice or comment is appreciated.
RF, Microwave, Antennas and Optics :: 05-16-2004 06:05 :: scoppulal :: Replies: 17 :: Views: 4249
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: 975
I need to measure the human tissue impedance. Any suggestions on how can i get accurate data or pointers on building impedance measurement circuit will be most appreciated.
Thanks you !
Analog Circuit Design :: 05-20-2004 10:59 :: brad :: Replies: 2 :: Views: 1697
A 5.1c amplifier schematics,
Hobby Circuits and Small Projects Problems :: 05-27-2004 01:02 :: tryagain :: Replies: 0 :: Views: 1139
Can anybody give some advice about microwave and rf measurement? Books are prefered,thanks.
RF, Microwave, Antennas and Optics :: 06-15-2004 03:11 :: lwwj :: Replies: 2 :: Views: 649
Why is the Q-factor of capaitor not stable when I'm measuring
capacitor by Agilent measurement equipment ?
RF, Microwave, Antennas and Optics :: 06-30-2004 00:00 :: myem :: Replies: 2 :: Views: 967
in EMF measurement, if the the frequence of jamming is same as the frequence of signal, and the in the same direction of signal ,how to cancel this kind of jamming? who can help me, thanks in advance! :?
RF, Microwave, Antennas and Optics :: 07-12-2004 05:24 :: cybcad :: Replies: 0 :: Views: 684
my question is how to deal with the interference in antenna measurement, if the interference is at the same frequency and in the same direction as the signal. and we can't avoid its frequency and direction. can anyone give me some advice? thanks a lot!
RF, Microwave, Antennas and Optics :: 07-12-2004 21:48 :: cybcad :: Replies: 0 :: Views: 496
Who have the schematic of "measurement box v3" for loudspeake@LAB.
Analog Circuit Design :: 07-14-2004 23:05 :: ynhe :: Replies: 0 :: Views: 783
Full version of LSPLAB is selled with a measurement box.
In order to use LSPLAB demo, i need to built this box by myself but i don't have internal electrical drawings.
If somebody have a idear....
Professional Hardware and Electronics Design :: 07-28-2004 05:24 :: ynhe :: Replies: 0 :: Views: 1198
I'm designing a current amplifier from 100fA resolution to 1uA full scale.
Any information like better topology, links to papers, personal experience, layout techniques, problems, tips and tricks will be welcome.
Thank you in advance.
Analog Circuit Design :: 08-09-2004 05:15 :: juaco :: Replies: 2 :: Views: 5996
Got some problems with the measurement of differential inductor ? Recently there are more and more papers describing the advantages of using differential inductor. Like Q enhancement, smaller area etc..
And papers always show the Q difference in differential and sigle-ended mode operation for an inductor, is that from measurement or just simulatio
RF, Microwave, Antennas and Optics :: 08-12-2004 21:17 :: cliffj :: Replies: 1 :: Views: 1517
I would like to get about measurement circuits to use OTA that is element in circuit.
RF, Microwave, Antennas and Optics :: 08-12-2004 21:50 :: LAKMON :: Replies: 0 :: Views: 721
I want to know that for load pull measurement (on wafer devices), do we get the power contour at constant (or 1dB compression point) delivered input power or constant absorbed input power.
i always find that paper only use Pin without specification.
thanks in advance.
RF, Microwave, Antennas and Optics :: 08-17-2004 12:41 :: dpxiao333 :: Replies: 5 :: Views: 1156