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105 Threads found on Rms Noise
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.
Please can anyone one help me in calculating the noise in Vrms. I have got the noise in cadence in uV/sqrtHz now I want to convert the uV/sqrtHz in Vrms. 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 (...)
As for a free-run oscillator, the jitter accumulates over time. The wavescope calculates jitter in a certain time windows. My question is if I want to know the rms jitter of a oscillator in a time range of ,maybe 4us , then what the is the frequency range for the integral of phase noise in reponse. (mainly, the lower limit of integral)
Hi, I am trying to measure AC rms voltage using PIC microcontroller. I have attached the circuit for measurement. I am connecting a 3V step down transformer out to the input of the circuit.The feedback capacitor has been added to reduce the noise, but I am getting noise if I add this. This is getting smooth after the low pass filtering. (...)
The definition of "plain" rms is the square-root of the sum of the squares. That gives the equivalent power value of the waveform (normally used in signal analysis), which is why the square is used (since power is proportional to the square of the voltage). It's not the average value. Does that answer your question?
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 bandgap 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 (...)
Hi All, I have the noise simulation results for a bandgap 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 figure is in log-domain. 13
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 opamp works perfectly to
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 bandwidth B is εn2B [V2 The rms voltage is VEF=sqrt(εn2[/SUP
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 ceramic by replacing the double bar non polar
hi, Prms = Vds x Ids Prms = rms RF output power.
See equation for rms Period Jitter in attached figure. How to derive this equation ? Especially, how is sin() term from ?
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. UV detect le
The quantization error produces harmonics which extend well past the nyquist bandwidth of DC to Fs/2. However, all those higher order harmonic must fold back into the nyquist bandwidth and sum together to produce the rms noise. you can think of this process as FIRST doing QUANTIZATION (which produces noise from DC to Higher frequencies than (...)
gangs, I am running .noise analysis in cadence's spectre. Two methods display the simulation results: method 1. plot equivalent input noise. This can be done by: locate spectre simulator menu-->results-->direct plot-->equivalent input noise. A figure will pop out. Then go to calculator's rms function. The final result is (...)
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? I don't know (...)
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.
Peak ripple would of course be (Max-min)/2 which is closer to rms noise, but depends on if your interest is thermal noise, clock feedthru or some other noise in the signal. Normally if it is fundamental f or 2f , we call it ripple, otherwise just "noise p-p" covers all types including transient (...)
. 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 before br
Standard Deviation=rms Value of noise

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