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64 Threads found on edaboard.com: **Noise And Rms**

most spectrum analyzers simply measure the power spectral density of the phase **noise**, **and** integrated it to show **rms** jitter. On the average, it is an accurate calculation.

RF, Microwave, Antennas and Optics :: 03-01-2017 10:21 :: biff44 :: Replies: **3** :: Views: **433**

Please can anyone one help me in calculating the **noise** in V**rms**. I have got the **noise** in cadence in uV/sqrtHz now I want to convert the uV/sqrtHz in V**rms**. I have the **noise** result attached. Do I have to use calculator if yes the how?
I want to calculate PSRR in cadence of an OTA. Can any one help me step (...)

Analog Circuit Design :: 01-11-2017 06:24 :: simplsoft :: Replies: **0** :: Views: **642**

Hi,
Maybe you mean the**noise** given at Opamp.
Like **noise**: 8 uV/sqrt(Hz)
This is not an absolute value of **noise**, but the **noise**_density....along the frequency axis.
To calculate the absolute value of **noise** you need lower **and** upper freqency limit (of interest).
Read: **noise** (...)

Analog Circuit Design :: 09-11-2016 05:52 :: KlausST :: Replies: **4** :: Views: **661**

Hi All, would anyone in this forum help me in a **noise** calculation problem? I post this in a different forum but did not get any answers.
------
I have the **noise** simulation results for a b**and**gap circuit. Am trying to calculate **rms** **noise** over 0.1Hz to 10Hz but not sure if my calculation is correct.
Here is (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 07-21-2016 02:02 :: bhl3302 :: Replies: **0** :: Views: **56**

Hi All, I have the **noise** simulation results for a b**and**gap circuit. Am trying to calculate **rms** **noise** over 0.1Hz to 10Hz but not sure if my calculation is correct.
Here is my results. The left figure **and** the right figure were plotted from the same data. The only difference is that the Y-axis of the right (...)

Analog Circuit Design :: 07-13-2016 16:32 :: bhl3302 :: Replies: **0** :: Views: **405**

The power darlington transistors need heatsinks. If the output voltage swing is as high as 8V **rms** then the output power is 8W into 8 ohms **and** each darlington heats with almost 2W.
The 741 opamp was designed 48 years ago! It is noisy **and** its slew rate cuts its high level frequencies above only 9kHz. A modern low **noise** audio (...)

Analog Circuit Design :: 05-31-2016 13:11 :: Audioguru :: Replies: **2** :: Views: **337**

Hi Saad,
Say you have the **noise** voltage expressed as εn .
Then the (normalized) power spectral density is εn2 [V2.
The normalized power in a b**and**width B is εn2B [V2
The **rms** voltage is VEF=sqrt(εn2[/SUP

RF, Microwave, Antennas and Optics :: 05-23-2016 21:48 :: zorro :: Replies: **4** :: Views: **527**

First try to define ( by commercial comparison) your expectations in a value for;
-equivalent input **noise** **and** signal range
-THD
-Output peak power
-**rms** power, **and** temperature rise from losses.
-Load impedance range vs power
**and** frequency response deviations
If you can afford to avoid poor choices of (...)

Hobby Circuits and Small Projects Problems :: 05-04-2016 18:33 :: SunnySkyguy :: Replies: **13** :: Views: **845**

See equation for **rms** Period Jitter in attached figure.
How to derive this equation ?
Especially, how is sin() term from ?

RF, Microwave, Antennas and Optics :: 03-11-2016 13:46 :: pancho_hideboo :: Replies: **1** :: Views: **625**

You are looking to design a Window Comparator which requires two Comparators with wired OR output low for detecting UV or OV.
This requires low ripple or **noise** inputs, hysteresis, supply filtering **and** a good low **noise** reference voltage for comparing the scaled inputs.
Define your spec first using **rms** converted to peak. (...)

Power Electronics :: 12-17-2015 05:55 :: SunnySkyguy :: Replies: **21** :: Views: **1637**

Hi.
Can somebody please explain (maybe in a little layman's te**rms** ;-)) the physical significance of WHY the ADC quantization **noise** spectrum lies from -fs/2 to + fs2 (fs being the sampling freq)? is it like the max. possible freq of such **noise** always

Analog Circuit Design :: 07-17-2014 15:38 :: jdp721 :: Replies: **6** :: Views: **1442**

Hi,
I have designed a front-end readout circuit which consist of a preamplifier **and** pulse shaper in Mentor Graphics. Now I want a **noise** simulation, from transient **noise** simulation I got the circuit output **rms** **noise** voltage, but how do I know each individual transistor **noise** contribution? (...)

Analog Circuit Design :: 08-13-2014 13:46 :: Nurahmad :: Replies: **0** :: Views: **605**

Unless there you don't mind measuring Signal + **noise**, the appropriate method is to convert Peak to **rms** assuming Sine wave **and** **rms**=Peak/Root(2) or 0.707 x Vp as Audioguru stated.
If you want to eliminate **noise**, then a tracking filter is needed.

Analog Circuit Design :: 07-01-2014 21:04 :: SunnySkyguy :: Replies: **11** :: Views: **1256**

. It depends on your sampling rate. ADC is linear but your detector is not.
Do you want to only track changes in Vac over long term or short term interruptions or do statistics Avearage & deviations ?
Choices:
quasi **rms** with Peak, P-p or rectified average
I would use LPF **noise** filter **and** rectified average with another LPF.
200Hz LPF (...)

Elementary Electronic Questions :: 05-12-2014 03:37 :: SunnySkyguy :: Replies: **3** :: Views: **843**

Professional Hardware and Electronics Design :: 03-07-2013 10:01 :: apolama :: Replies: **1** :: Views: **639**

here's one guess --- don't take it as gospel, but it make put you on the right track :
**noise** voltage average is considered to be zero. However **noise** power is not. Thats where the v^2 comes from of course.
However note that its not absolute **noise** power, but rather mean **noise** power. That might imply a (V/2) ^2, (...)

Analog Circuit Design :: 01-18-2013 15:37 :: kripacharya :: Replies: **3** :: Views: **452**

Hello,
My flyback transformer is making a **noise**. **and** its loud that I can here it in the next room. This flyback transformer is a part of smps based on UC3842. with TL431 feedback. I have connected lamp as a load. It glows, but I am not able to measure its voltage, because the digital multimeter shows some r**and**om reading (The meter is (...)

Power Electronics :: 10-16-2012 17:12 :: I_think :: Replies: **8** :: Views: **1151**

IN my lab ,there is a PNA N5247 without options 029, if i want to measure the NF ,i must buy options 029,but i have found that the options 029 is too expensive to me i must find other method to measure the **noise** figure ,there is a N8975A in my lab too, but its maximum frequency is 26.5G ,so i must add blockdown converter ,N8975AZ-K40/K50 is a b

RF, Microwave, Antennas and Optics :: 09-07-2012 09:39 :: eason.RFIC :: Replies: **2** :: Views: **851**

EVM(%) = *100 = *100 = 5%
For Modulation Error Ratio you need the average power of the signal **and** of the **noise**. But MER generally is very close to EVM.

RF, Microwave, Antennas and Optics :: 08-29-2012 06:59 :: vfone :: Replies: **3** :: Views: **1595**

hello!
Does anyone know how to get the **rms** output **noise** **and** input dynamic range
of a transimpedance amplifier using cadence or synopsys?
Please help me. I don't have any idea on how to get it..

Analog Circuit Design :: 03-21-2012 15:24 :: aprilyne :: Replies: **0** :: Views: **845**

How to get the total energy expression of two wavefo**rms** buried in a **noise**

Digital Signal Processing :: 03-20-2012 21:03 :: Pheemmzzyy :: Replies: **2** :: Views: **641**

When I simulated the phase **noise** of a ring oscillator based VCO using Spectre p**noise** analysis, I found the **rms** accumulated jitter increasing with increasing the maximum number of sideb**and**s. **and** the dominant **noise** contributor was the induced gate **noise** of some swtiched off (...)

Analog Circuit Design :: 01-22-2012 12:58 :: murali83.july :: Replies: **0** :: Views: **622**

What is the difference between phase **noise** in rad **and** dBc/Hz. I would like to know how to convert radians into dBc/Hz.
thanks in advance :)

RF, Microwave, Antennas and Optics :: 06-01-2011 03:30 :: bharadwaj.cv :: Replies: **2** :: Views: **5239**

hi all,
if the input **rms** **noise** of an amplifier is AV**rms**, the b**and**width is BHz, **and** the input-referred **noise** is CV/rtHz. Assuming the **noise** is flat.
1. What's the relation between A **and** C? does C equal A/rtB?
2. How to convert A (or C) to decibal? is (...)

Analog Circuit Design :: 04-19-2011 02:44 :: x1346 :: Replies: **1** :: Views: **1189**

Hi all,
I have several questions which i will describe by topics. All the circuit design is made in C**and**ence using Spectre.
1 - As transient **noise** introduces **noise** in the transient simulation, I export the data to Matlab to perform the Jitter (**rms** **and** Peak-to-Peak) calculations. How can I do this in (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-06-2011 07:26 :: netbug :: Replies: **0** :: Views: **3043**

I was asked to find a method to measure Time jitter **and** Phase **noise** of Frequency modulated wave.
I tried to search a lot but in-vain.
If any body has any idea or document which can be helpful for me then it would be great.
Thanks.

RF, Microwave, Antennas and Optics :: 03-17-2011 12:10 :: sandesh564_123 :: Replies: **3** :: Views: **713**

In general it will depend on the application but good tests include:
- minimum load for stability
- phase margin
- gain **and** GBW
- slew rate OR settling time to a specific level **and** accuracy
- input common range
- PSRR
- **rms** **noise**
Let us know if you need specific ideas

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 03-11-2011 16:07 :: dgnani :: Replies: **3** :: Views: **984**

Yes, is the same when somebody try to design the best sensitive with lowest **noise** floor receiver, when actually the receive frequency b**and**, is ten times noisier than the RX **noise** floor (due to multiple factors as: power lines, catv, ignition, industrial, cellular, radars, weather, sky/solar).
Soon, due to so much **noise**, we (...)

Analog Circuit Design :: 10-22-2010 08:53 :: vfone :: Replies: **4** :: Views: **1260**

Hi AdvaRes,
there isn't short answer for that.
you will need to know the power supply parameters like:
**rms** **noise**, ptp **noise**, switched or LDO, is switched at what frequency **and** what is the output capacitor **and** Inductor.
if it's LDO then it is more simple, for example if you will use LDO of Linear (...)

RF, Microwave, Antennas and Optics :: 07-17-2010 09:20 :: rancohen_2000 :: Replies: **3** :: Views: **1171**

"The effective **noise** b**and**width (ENB) is a property for a filter circuit **and** not for an opamp alone."
Then, how can I calculate the ENB of op-amp?
how can I simulate the input referred **rms** **noise** of op-amp in h-spice?

Analog Circuit Design :: 07-15-2010 11:11 :: fsunken :: Replies: **0** :: Views: **1408**

Hello everyone,
Do you have any idea in **noise** definition **and** measurement for CMOS image sensor?
As far as I know, to find the **rms** **noise** of the image sensor, we will get the N sample values of output signal of a pixel at, then calculate the st**and**ard derivation of these samples => **rms** (...)

Analog Circuit Design :: 04-22-2010 07:47 :: rficdesigner :: Replies: **4** :: Views: **1861**

Hi raebrm,
I have heard that SNR is the ratio of signal power to **noise** power':!:'

Digital communication :: 02-25-2010 14:41 :: matbob :: Replies: **2** :: Views: **5150**

Hello,
We would like to measure the **rms** output **noise** voltage, SNR **and** Minimum detectable signal (MDS) of a transimpedance amplifier (TIA).
Do you know the methods, instruments, **and** measurement setup, please help me.
Thanks you **and** have nice day.

Analog Circuit Design :: 02-25-2010 07:18 :: rficdesigner :: Replies: **0** :: Views: **2108**

Factors that will influence the **rms** (narrow or braod b**and**) are:
Temperture
Other process related **noise**
The way you take the FFT. (FFT bin size)
Sinc the capturing of the time domain wave form to start at the same shaft angle
Please see tha attached graphs at login with username demo **and** password demo. Download compone

Elementary Electronic Questions :: 01-30-2010 09:57 :: klystron :: Replies: **4** :: Views: **2511**

I would like to generate **noise** from 100Hz to 1kHz. Its spectral components should be falling with higher frequencies similar as in the picture (it would be desirable, that I can adnjust the frequency slope). The **noise** should have constant **rms** value.
In the current circuit I take white **noise** from function generator (...)

Analog Circuit Design :: 08-23-2009 19:19 :: egomez :: Replies: **2** :: Views: **2696**

Johnson-Nyquist **noise** theory is based on a physical resistor connected to something with conducting wires. KTB is the available **noise** power. This is only into a matched load. In air the impedance is infinite **and** so there is a severe voltage divider effect to your DVM leads.

Elementary Electronic Questions :: 06-13-2009 21:05 :: flatulent :: Replies: **2** :: Views: **3711**

1. Power Meter (peak, average, **rms**, etc), Two RF Signal Generators with multiple modulations, Spectrum Analyzer, Load Pull Tuners, Power Supply with accurate current **and** voltage readings.
2. Network Analyzer, Two RF signal Generators, Spectrum Analyzer with NF measurement option.
3. Spectrum Analyzer with Phase **noise** measurement option, (...)

RF, Microwave, Antennas and Optics :: 05-21-2009 06:51 :: vfone :: Replies: **2** :: Views: **1023**

Dear All :
Does anyone know how to run Opamp **noise** ? I read some paper , It descibe the opamp DC gain , Unit gain Bw , **and** **noise** (**rms** uV) , How do we to run the opamp **noise** , Does the method is like run DC gain ? Does anyone get me hints ,or document , Thanks

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 05-15-2009 08:17 :: mitgrace :: Replies: **1** :: Views: **902**

Any other exemple regarding Phanse **noise**, **rms** **and** **rms** **noise**?

Digital Signal Processing :: 03-03-2009 09:02 :: AdvaRes :: Replies: **12** :: Views: **20167**

Hi ,
I'm working on the EMG amplifier **and** I want to measure **noise** on my complete circuit(Preamplifier,filter,amplifier,...).
I found my Oscilloscope **and** voltmeter shy to measure my **noise** ,thier sensitivity are very LOW!!!
I want to find good circuit for NIOSE METER **and** bulid it my own.
I have (...)

Analog Circuit Design :: 12-04-2008 16:03 :: Vahab :: Replies: **2** :: Views: **1608**

Hi,
I am designing a transmitter **and** I want to control jitter measurement by measuring **noise** on the input signal. Can I request anyone to please help **and** give me a code, as to how can I measure **noise** in the input signal for each clock period as I want to get Average voltage **and** **rms** (...)

Analog Circuit Design :: 10-22-2008 14:17 :: nishant22 :: Replies: **0** :: Views: **899**

question about pll **noise** ,thanks
we have designed a pll,with nearly 4ps **rms** jitter with OSC measured. but with the Spectrum Analyzer ,the phase **noise** has the different value in the different frequency point .
we want to know the different of the **rms** jitter **and** phase **noise**: (...)

Analog Circuit Design :: 05-05-2008 07:06 :: eagleliujun :: Replies: **1** :: Views: **751**

Analog Circuit Design :: 03-25-2008 07:32 :: safwatonline :: Replies: **6** :: Views: **1498**

My old Heathkit AA-1800 power amp (about 500W/ch **rms** into 8 ohms) uses good-old-fashioned mechanical relays in the speaker outputs. A small control circuit closes the relays after the +/- 100V rails have stabilized, **and** quickly opens the relays at power-off or if significant DC offset is detected. It's a DC-coupled design, except for

Analog Circuit Design :: 01-19-2008 15:14 :: rachel607 :: Replies: **4** :: Views: **2596**

P**noise**=(V**noise**)?/2R here the 2 is due to average power concept....
**noise** here the **rms** value is used for V**noise** which leads to 1/(√2)? **and** hence leading to another 2 in the denominator...
we know that P**noise**=kTΔf .... (...)

RF, Microwave, Antennas and Optics :: 10-08-2007 13:37 :: A.Anand Srinivasan :: Replies: **1** :: Views: **859**

I have **rms** jitter specification for a pll. what actually this refers to?
Is this r**and**om jitter?
If we do the phase **noise** simulation **and** calculate jitter value, what jitter we get?

Analog Circuit Design :: 09-18-2007 06:48 :: satyasiva :: Replies: **2** :: Views: **1915**

hi, renwl, jitter is the integration of phase **noise**
thanks!
can I know the jitter when I know the phase **noise**?
what's the simplified method to h**and** calculate it ?

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 07-31-2007 11:51 :: renwl :: Replies: **3** :: Views: **1132**

There is no **noise** in transient analysis.

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 07-17-2007 09:31 :: zwei78 :: Replies: **8** :: Views: **2608**

(1) Sinad is ratio -- so u dont have to worry about scaling for determining the same.
(2) For **rms** value of the harmonic spurs you use √2
(3) For **noise** -- you need to average over all the **noise** bins **and** find the avg

Digital Signal Processing :: 06-11-2007 03:17 :: brmadhukar :: Replies: **3** :: Views: **1567**

Hi,
If you are given receiver sensitivity in dBm, you can't really get the gain of the TIA. From the receiver sensitivity, you can get how much the current amplitute **and** dc value. If you are given input **noise** current **and** output **rms** voltage **noise**, then only u can calculate the TIA gain. I suggest you to (...)

Analog Circuit Design :: 04-27-2007 07:01 :: suria3 :: Replies: **1** :: Views: **1485**

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