Nov 19, 2020 · Curiously enough, 1/f noise is present in nature in unexpected places, e.g., the speed of ocean currents, the flow of sand in an hourglass, the flow of traffic on Japanese expressways, and the yearly flow of the Nile measured over the last 2,000 years.9 If you plot the loudness of a piece of classical music versus time, you get a 1/f spectrum!

Nov 6, 2024 · There are two things that can cause drift one is 1/f noise and the other is ambient thermal variations. See my answer here: 1/f noise, is it limited? In silicon 1/f noise is caused by recombination effects of electrons: A pretty often measurable phenomenon is noise with a spectrum proportional to 1/f. This leads to the name 1/f noise.

May 23, 2018 · In fact, the popular mythology of a low frequency noise catastrophe (to which your thinking would have fallen victim) is quite without merit: even if the noise power density continues as 1/f all the way down to zero frequency, its total noise power (i.e., the integral of noise power density) diverges only logarithmically, given that \$ \int f ...

In my case, the problem is the noise is relatively small compared to the DC component, and the amplifier can easily get overloaded by the DC offset before amplifying the noise to a reasonable level. But if I use a DC block, the low cut-off frequency is still not low enough. For 1/f noise, I would like to measure down to 1 Hz.

Apr 7, 2024 · \$\begingroup\$ Didn't know that 1/f looked like a line in a lin-log-plot, or that Vpp=6.6* Vrms was a universal relationship.. 😬 Cringe is strong when you see someone trying to write a rigorous App Note on noise analysis and then put forth such an analysis when they could have just said: square the amplitude noise density spectrum, integrate and take square root.

May 17, 2017 · \$\begingroup\$ you mean that if I send 10 watt through transistor as 100 volt and 0.1 ampere it will have less 1/f noise than 10 volts,1 ampere? So high current = high 1/f noise but high voltage doesnt cause high 1/f noise if the current isnt …

Jan 16, 2013 · Noise simulation mode. Also, just in case you were not aware, SPICE has a noise simulation mode, to quote from the help files:.NOISE -- Perform a Noise Analysis This is a frequency domain analysis that computes the noise due to Johnson, shot and flicker noise. The output data is noise spectral density per unit square root bandwidth.

Aug 6, 2022 · For simplicity I take just the input voltage noise density into consideration and ignore the resistor thermal noise and input current noise. The input RMS noise calculates as follows with the parameters above: $$ E_{n,in} = \sqrt{NBW} * e_{n,in} = \sqrt{2 MHz}* 50 \frac{nV}{\sqrt{Hz}} = 70.71 µV RMS $$ So clearly the op-amp noise dominates my ...

Apr 30, 2017 · A more likely cause for the difference in noise between N- and P-type MOS becomes clear when you look at the formulas describing 1/f noise: the K-parameter is in there. K is directly related to electron/hole mobility and higher for NMOS (electron mobility) than for PMOS (hole mobility) resulting in higher K for the NMOS resulting in higer noise ...

Jan 10, 2012 · For example, if a white noise source produces 2 nV/sqrt(Hz), and we measure it with 1 Hz bandwidth around 100 kHz or with 1 Hz bandwidth around 100 GHz, we'll measure 2 nV rms noise in either case. Thermal noise is a white noise source, while "contact noise", as mentioned above, is not white because it has has 1/f frequency dependence.