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25 Threads found on edaboard.com: **Rms Input Noise**

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 (...)

Microcontrollers :: 11-24-2016 13:34 :: archusvijay1 :: Replies: **6** :: Views: **664**

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?

Analog Circuit Design :: 09-11-2016 00:34 :: crutschow :: Replies: **4** :: Views: **689**

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 (...)

Hobby Circuits and Small Projects Problems :: 05-04-2016 18:33 :: SunnySkyguy :: Replies: **13** :: Views: **897**

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 (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-08-2014 02:07 :: hyleeinhit :: Replies: **1** :: Views: **1494**

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: **1309**

. 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

Elementary Electronic Questions :: 05-12-2014 03:37 :: SunnySkyguy :: Replies: **3** :: Views: **869**

Just quoting model numbers without even a manufacturers name is of no use to most members of this forum. What you need is a CW signal source with a calibrated attenuator, a receiver with an IF output and a **rms** power meter that is accurate at IF and an **input** termination resistor. So what have you not got?
Frank

RF, Microwave, Antennas and Optics :: 09-07-2012 18:07 :: chuckey :: Replies: **2** :: Views: **877**

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: **877**

If the **input** signal aren't guaranteed to have a clean sine waveform (they hardly will), a true **rms** measurement is required. It can be only performed by summing the squares.
For the **rms** measurement, filtering of the **input** signals doesn't make much lsense, unless you have high frequency **noise** that you want (...)

PLD, SPLD, GAL, CPLD, FPGA Design :: 06-24-2011 12:08 :: FvM :: Replies: **8** :: Views: **4781**

hi all,
if the **input** **rms** **noise** of an amplifier is AV**rms**, the bandwidth 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 NF=10log(1+C/4kTRs) or (...)

Analog Circuit Design :: 04-19-2011 02:44 :: x1346 :: Replies: **1** :: Views: **1243**

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: **1026**

"The effective **noise** bandwidth (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: **1455**

How to create Test Bench to find **input** referred **noise** of any block for example inverter/Dff.
How to find **rms** **noise** of the circuit? Please comment..

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 11-12-2009 07:35 :: sachi005 :: Replies: **1** :: Views: **1429**

There is a **noise** generator in analogLib..
You may set the **rms** **noise** voltage in properties menu..

RF, Microwave, Antennas and Optics :: 12-11-2008 20:37 :: BigBoss :: Replies: **4** :: Views: **969**

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** voltage for each (...)

Analog Circuit Design :: 10-22-2008 14:17 :: nishant22 :: Replies: **0** :: Views: **922**

In Gray's book, the feedback has no effect on the circuit equivalent **input** **noise**. But my question is, does the feedback have no effect on the circuit equivalent **input** **noise** **rms** value or the equivalent **input** **noise** spectral density? i.e. for a circuit with the feedback, does (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 08-03-2007 05:54 :: surianova :: Replies: **6** :: Views: **2067**

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 study on the Bezhad (...)

Analog Circuit Design :: 04-27-2007 07:01 :: suria3 :: Replies: **1** :: Views: **1506**

Hi,
I'm desigining a Transimpedance amplifier with the bandpass response, which means the differential output of the TIA is feedback to the **input** of the TIA for DC cancellation purpose. My question is, how do I calculate **input** referred **rms** **noise** of the TIA in Cadence. I understand that for the forward TIA design (LPF (...)

Analog Circuit Design :: 03-06-2007 09:08 :: suria3 :: Replies: **0** :: Views: **1169**

how to measure the **input**-referred **rms** **noise** voltage of ADC?
for example, the **input**-referred **rms** **noise** voltage of pipeline ADC.
thanks.

Analog Circuit Design :: 01-30-2007 12:18 :: renwl :: Replies: **0** :: Views: **1715**

an actual adc will produce additional codes outside the main bin for any dc **input** value ,due to the presence of **noise**, as show in following pic. this histogram is some like gaussian distribution.
my question is how to get **rms** **noise** from this histogram, then get the effective bit of ADC
thanks:D

Analog Circuit Design :: 09-06-2006 07:53 :: xusoso :: Replies: **1** :: Views: **1860**

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oscillator hspice | impedance and cst | sqrt verilog | dac pwm | voltage subtract | analog pwm | coaxial length | scan chain lockup | calibreview | hfss variables change

oscillator hspice | impedance and cst | sqrt verilog | dac pwm | voltage subtract | analog pwm | coaxial length | scan chain lockup | calibreview | hfss variables change