1000 Threads found on edaboard.com: Peak Rms
because it is of more use than the peak, Most of the cases rms valus is of use thatn the peak.
rms is the effective voltage ...
u can calculate peak from rms if u require taht .
Embedded Systems and Real-Time OS :: 05-22-2009 06:22 :: BABESH :: Replies: 2 :: Views: 1195
Output voltage has it's peak, rms or average value. No matter how it is measured the result depends on it's waveform or shape over time. If the voltage is pure DC it's peak, rms or average values are equal. Voltage with added ripple has different values for peak, rms and average measurement (...)
Electronic Elementary Questions :: 05-15-2006 15:04 :: Borber :: Replies: 4 :: Views: 1973
if you remove the rectifier+filter and add some DC bias for the ADC you can also measure the frequency, peak, rms and mean.
Analog Circuit Design :: 05-27-2009 07:30 :: xvibe :: Replies: 7 :: Views: 4302
Unfortunately, you come out with the 10 ps at the end. Of course 10 ps it's still just a number without telling about peak-to-peak,
rms phase or period jitter. Seriously, you'll have difficulties to find a ready made 500 MHz crystal oscillator with a suficient jitter specification,
you also must to decide about an I/O standard, ECL or (...)
Electronic Elementary Questions :: 04-14-2010 09:20 :: FvM :: Replies: 28 :: Views: 2937
I'm doing some signal processing/data analysis. Hope to get some advice on something.
I collected some vibration data just the other day while metal cutting and I'm wondering what is the correct (or better) way to do this.
These are what the signals look like. Sampling rate of the data is 10000 hz.
Digital Signal Processing :: 05-19-2012 04:37 :: Luppy :: Replies: 4 :: Views: 615
How does one determine the full scale range for the ADC when it is specified in terms of Vrms?
Can I compute the Full scale peak value as Vrms*2*sqrt(2) ?
Also does this mean that the ADC is single ended? If not, how does one determine the lowest input voltage?
The spec is as given in the attached image (...)
Analog Circuit Design :: 11-18-2014 01:58 :: Ranand :: Replies: 6 :: Views: 479
How do i measure rms output power?
How do i measure AC voltage output power?
How do i measure the peak output power?
Electronic Elementary Questions :: 06-08-2005 21:28 :: walters :: Replies: 4 :: Views: 1473
moreover .why it should be rms ....why should not as +340V,-340V while referring
because, simply said, this value (rms) is sort of a mean value which is engaged in, especially, power calculations, etc.
e.g. for resistive loads power can be simply calculated multiplying current and voltage rms values: P
Electronic Elementary Questions :: 12-16-2005 08:59 :: Eric Best :: Replies: 23 :: Views: 23461
not the expert in this field but I would say that the only difference might be in the time constant used in video portion of detector circuit. For peak detector the constant should be very small so that instantaneous value of the signal is detected, for rms detector it should be long so that integrator like performance is obtained.
RF, Microwave, Antennas and Optics :: 08-25-2006 07:53 :: flyhigh :: Replies: 9 :: Views: 6412
i was wondering what is the peak voltage , average voltage , rms voltage that a transistor 0.18um TSMC nominal Vth can tolerate on its gate before breaking down.
as i have a pulse on the supply at start up and i want to know if it is OK , i think it is an electrical rule but i don't have the Documentation around me right now.
Analog IC Design and Layout :: 01-28-2007 08:03 :: safwatonline :: Replies: 0 :: Views: 615
for example you have an AC source its voltage is expressed by
at any time t the voltage instantenous vale is expressed by the equ.
voltage peak vale is A
peak 2peak value is 2*A
while rms value is A/sqrt(2)
rms for any waveform is the root of the mean of the signal squared.
Electronic Elementary Questions :: 04-12-2007 13:01 :: quaternion :: Replies: 2 :: Views: 3790
In my SMPS I need to use a current transformer. My rms current is < 15A, but the peak value is 33A (worst case).
My question is, would a 25A rms current transformer be OK?
I would like to use the CST306-2A transfomer:
The problem is, the datasheet doesn't say anything about (...)
Power Electronics :: 05-07-2009 15:37 :: Mercury :: Replies: 4 :: Views: 5088
Hope someone can help me with the definition of signal-to-noise ratio (SNR).
On the last page of this document:
it is said that SNR is the ratio of the peak-to-peak signal and the rms noise
says that it is the rat
Digital communication :: 02-24-2010 09:04 :: raebrm :: Replies: 2 :: Views: 3379
just wanted to show the SMPS I have done. I dont know how to put it here.
1100W rms SMPS, 1700W peak
For more informations.
please see it at
Show DIY :: 05-30-2010 17:56 :: microsim :: Replies: 1 :: Views: 3306
In NXP datasheets, it specifies test signals as CW, 2-tone or WCDMA.
For the CW test signal, is this an absolute peak power, or an rms power?
RF, Microwave, Antennas and Optics :: 05-07-2013 11:55 :: RFegg :: Replies: 4 :: Views: 429
A phase angle meter has a Total button and a In-Phase Button
The Total Button measures in rms and is the same AC measurement as a DVM meter in AC mode?
The In-Phase measures in rms or peak?
The In-Phase measures the input voltage in phase with a reference input voltage of the same frequency
The Polarity and Magnitude is (...)
Electronic Elementary Questions :: 10-14-2014 19:15 :: ParkerMike :: Replies: 9 :: Views: 525
My motor rated current is 3a found in name plate it is rms current are peak current
This is thermally rated for rms, whereas peak current will depend on load, acceleration and Coil resistance, Rs.
*Added 5x .. Depends on winding resistance
Often this is 5x-8x steady rated current
Microcontrollers :: 12-13-2014 12:08 :: SunnySkyguy :: Replies: 1 :: Views: 112
For example, RFMD's RF5117 and Intersil's ISL3984
Does Somebody know how to design the peak detector(or power detector) for WLAN HBT power amplifier?
Other Design :: 05-13-2002 11:16 :: cwcwecan :: Replies: 1 :: Views: 2392
As long as I know, PMPO goes for peak Maximum Power Output and its relation to the rms value depends on several factors. As a rms value depends on the shape of the wave, so it does the PMPO. Due to the complexity of the audio signal and overshoot response of the amplifier, it would be impossible to predict EXACTLY the (...)
Hobby Circuits and Small Projects Problems :: 01-27-2003 09:44 :: 2000 :: Replies: 25 :: Views: 107462
So 240*sqrt(2) is the dc equivalent. Isn't this the peak value of the ac as well?
Mathematics and Physics :: 03-22-2004 12:17 :: ee01akk :: Replies: 7 :: Views: 8677
These low cost meters measure either peak or average and do a guess for the rms based on the assumption that the input is a sine wave.
I know of some types which do a series of random samples and calculate the rms from that. There is an IC that actually heats a resistor with the input signal and then heats another resistor with DC and (...)
Hobby Circuits and Small Projects Problems :: 08-31-2004 13:25 :: flatulent :: Replies: 3 :: Views: 976
Why not rule of thumb:
(Vpeak-to-peak)*(0.707) = Vrms
(Vrms)/(0.707) = Vpeak-to-peak
Electronic Elementary Questions :: 10-15-2004 20:11 :: djalli :: Replies: 25 :: Views: 9101
Of course you have to adequate the 50V peak voltage signal to the input voltage limit of ports of the PICmicros (if Vdd = 5V, then the upper limit is 5V for the A/D analog or digital inputs). Use a voltage divider (1:10).
Another restriction is the sample frequency if you are going to use the A/D converters of common PICs (16F and 18F se
Microcontrollers :: 03-16-2005 07:25 :: rkodaira :: Replies: 3 :: Views: 1438
rms is just the average voltage of an AC signal which is 1/√2 × peak~peak voltage of the signal, the word bandwidth can often be found to describe the frequency response of an amplifier, it is usually measured from the 3dB roll off point of the highest frequency to the lowest frequency of an amplifier or vice versa. eg. if an amplifier (...)
Electronic Elementary Questions :: 04-28-2005 09:21 :: Learner :: Replies: 7 :: Views: 5610
How to calculate the peak voltage on telephone line when the telephone ring?
Professional Hardware and Electronics Design :: 06-08-2005 02:39 :: cqjhq :: Replies: 4 :: Views: 2336
Is sin, for eletric energy.
if only one sinus carrier at AC-insignal, is easy (0.7071 * Up-p)/2 = voltage rms
Up-p is measured voltage peak to peak.
but if measure complex multi frequency and noise signal is more difficult.
remember rms means 'root mean square' and represent powers heat di
Microcontrollers :: 12-15-2005 18:39 :: xxargs :: Replies: 5 :: Views: 1109
comparing signals means comparing power of the two signals
i understand from your questions that you have 5V DC and 2.5V AC peak to peak
DC power will equal AC power when AC value is given as rms (root mean square )value and not peak value
that means if in your system :
V DC *I DC=V rms AC *I (...)
Electronic Elementary Questions :: 02-10-2006 13:31 :: hani51 :: Replies: 4 :: Views: 1064
I want to calculate True rms(Root Means Square) of Square Wave in Assembly Language of PIC 16F72.
For a pure square wave:
1. Square waves: Like sine waves, square waves are described in terms of period, frequency and amplitude:
peak amplitude, Vp , and
Microcontrollers :: 03-25-2006 14:03 :: silvio :: Replies: 3 :: Views: 2616
I dont quiet understand the definition of peak to average ratio.
Suppose my DAC outputs a signal with 10dB peak to average.
If I measure the signal on the oscilloscope, will I see the peak signal 3.16 times (10dB) higher then the rms signal?
rms = 0.1V
peak to (...)
RF, Microwave, Antennas and Optics :: 11-28-2006 11:45 :: Jim cage :: Replies: 1 :: Views: 929
An rms voltage, when connected to a resistive load will produce the same amount of power as A DC voltage of the same value.
Consider a square wave with a 1V "peak" value, a 0V "valley" value, and a 0.5 (50%) duty cycle. The average value is 0.5. The rms value is 1/SQRT(2). The power dissipated in a 1 Ohm load = X D
Analog Circuit Design :: 12-06-2006 13:07 :: Kral :: Replies: 9 :: Views: 2262
Should we only observe the peak-to-peak jitter from eye diagram in Hspice?
And, I have another question that's why peak-to-peak jitter is almost 7 times more than std. dev. jitter where std. dev. is standard deviation.
Analog Circuit Design :: 05-08-2007 13:06 :: shaq :: Replies: 1 :: Views: 1117
Audio amplifier manufacturers routinely (and incorrectly) refer to "rms power". While "rms power" can be calculated, it has no useful physical meaning. The correct term is "Average Power". For a sine wave voltage into a resistive load, the peak power is twice the average power.
Electronic Elementary Questions :: 05-31-2007 10:39 :: Kral :: Replies: 6 :: Views: 3860
The rms value is the voltage in a purely resistive load that results in the same power (Heating effect) as a DC voltage of the same value. For example, a sine wave with a peak voltage of 1.0V. produces the same power into a resistive load as a DC voltage of (SQRT(2))/2 volts. So the rms vlaue of this AC voltage is (...)
Electronic Elementary Questions :: 05-31-2007 10:34 :: Kral :: Replies: 9 :: Views: 8254
Could someone please find me a definition?
Is it from time average point of view ?
Or from rms/peak voltage point of view?
RF, Microwave, Antennas and Optics :: 02-29-2008 03:14 :: passerby :: Replies: 1 :: Views: 888
Its a simple calculation.
Take the peak to peak value and divide it by square root of 2. Thats all.
PC Programming and Interfacing :: 05-31-2008 10:38 :: boseji :: Replies: 2 :: Views: 1005
Here's a simple test: Feed a symmetrical square wave into the meter. The rms, average, and peak values of a symmetrical square are equal. If the meter indication is equal to the peak value of the square wave, then it's a true rms meter. If the meter indicates .707 X the square wave peak or , (...)
Electronic Elementary Questions :: 10-28-2008 12:20 :: Kral :: Replies: 8 :: Views: 2003
Could you please explain some jitter defiinition definitions.
Suppose that we have a sine wave:
I found this defintions:
Jitterpeak-to-peak = Jittermax - Jittermin
Period Jitter: The maximum change of the signal edge from the expected of ideal position in time
Phase Jitter : The maximum
RF, Microwave, Antennas and Optics :: 04-06-2009 07:34 :: AdvaRes :: Replies: 0 :: Views: 1129
rms is all about comparing apples to apples, irrespective of what signal waveform is applied. The rms of a DC signal will be the DC signal, taking the rms of an AC, PWM, sawtooth or complex signal allows us to compare their 'real value' when comparing between them.
Most of the cheaper meters don't measure true rms. They (...)
Electronic Elementary Questions :: 05-09-2009 07:18 :: trekkytekky :: Replies: 1 :: Views: 2591
Research shows that rms watts is defined as the continuous average power when the amplifier is driven with a sine wave while PMPO is the abbreviation for peak music power output which is recognised as the total useless since there is no agreed method of arriving at a figure.
I think by now he might have got the
Show DIY :: 01-25-2011 23:36 :: ckshivaram :: Replies: 2 :: Views: 30987
PMPO vs rms watts
Those symbols are used for radio power. The real power is rms (Root Mean Square), while PMPO means music power (peak Music Power Output). How to compare those – you need to split PMPO by 3 and then you will get rms (almost). For example if you have JVC with 19W rms / 50W PMPO. (...)
Miscellaneous Engineering :: 05-13-2010 06:42 :: gres :: Replies: 0 :: Views: 13703
if the current is sinusoidal then have a peak detector in th sy
and calculate rms from peakvalue.
Analog Circuit Design :: 06-25-2010 02:47 :: srizbf :: Replies: 4 :: Views: 820
For sinusoidal waveforms, the reference being 0.774Vrms = 0dBu:
-1dBu = 1.95Vpp
-2dBu = 1.74Vpp
-3dBu = 1.55Vpp
-4dBu = 1.38Vpp
-5dBu = 1.23Vpp
-8dBu = 870mVpp
-10dBu = 690mVpp
-15dBu = 389mVpp
-20dBu = 219mVpp
-25dBu = 123mVpp
-30dBu = 69mVpp
-40dBu = 22mVpp
-50dBu = 7mVpp
Vpp is the rms voltage multiplied (...)
Electronic Elementary Questions :: 08-27-2010 23:32 :: Externet :: Replies: 1 :: Views: 1104
BER = Bit Error Rate
For a serial data stream this give the number of bits which are sampled wrong due to jitter. So it is a precentage of errors.
e.g. 10e-12 means one out of 10e12 bits are wrong.
the rms (or sigma) value is given for random jitter (RJ)
random jitter is gaussian and unbound (from the theory)
For a gausian random jitter the
Analog IC Design and Layout :: 12-08-2010 02:18 :: qieda :: Replies: 1 :: Views: 919
The average voltage of a sine wave is equal 0V.
The average voltage is simply mathematical average nothing more.
rms represent DC equivalent for power calculation.
For example if I have 230V DC and I plug this voltage across light bulb.
So to get the same amount of light with AC voltage you need connect 325Vp (peak) sin wave. Vrms =
Electronic Elementary Questions :: 12-24-2010 16:34 :: jony130 :: Replies: 8 :: Views: 30017
As FvM states, you need to convert it first. The rms conversion takes care of the polarity and wave shape. Just dividing it by 3 would still give you (assuming a sine wave) a signal of 14V peak to peak. You may need to scale it before the rms conversion and you may need to amplify the result but there is no other reliable (...)
Microcontrollers :: 02-21-2011 06:23 :: betwixt :: Replies: 2 :: Views: 999
can someone help me with a circuit or a part number that converts 220v peak to peak from a transformer to 310v dc
Hobby Circuits and Small Projects Problems :: 04-26-2011 11:57 :: mazhara :: Replies: 5 :: Views: 2950
I want to measure rms voltage between points a (0.5) V and I rewrite a program in C to achieve my purpose may i know it does not work with me each time I simulate, I vary the amplitude of input signal to the peak I receive on an LCD value false efficient value
isis on my diagram is more than just a pic 16F877 connected with an LCD and a sine signa
Microcontrollers :: 05-17-2011 15:16 :: MARWEN007 :: Replies: 0 :: Views: 1151
I have a bit difficulty in understanding PMPO - the two different definitions about it and its purpose, and a question: Is it anything related to power consumption of the audio appliance?
Anywhere i can understand it clearly, pls elaborate your explanation.
PMPO = peak Music Power Output/peak momentary power output??
Electronic Elementary Questions :: 06-10-2011 07:26 :: ElectroEnthusiast :: Replies: 6 :: Views: 2916
I have been searching for an equation to convert peak to peak Voltage to dB and I have found 4 slightly different equations that all claim to do the same thing:
1) dB = 20*log_10(Vpp/0.707)
2) dB = 20*LOG10(Volts_peak_to_peak/SQRT(0.008*Z))
3) db = (20log10) (rms ) & rms= 0.707*P-P
Mathematics and Physics :: 12-28-2011 13:58 :: juz_ad :: Replies: 8 :: Views: 10552
Do you know of a mathematical expression that give the rms value of this Discontinuous current waveform?
(i.e. supposing I know the peak value, the rise time, fall time and dead time)
Electronic Elementary Questions :: 08-18-2012 11:16 :: treez :: Replies: 6 :: Views: 757