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Flicker Noise Thermal Noise

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41 Threads found on Flicker Noise Thermal Noise
Hi everyone. I am using Cadence IC5 to simulate a 2 stage opamp noise. What I want is to find the corner frequency where 1/f noise equals thermal noise. The problem is that from "direct plot->main from->noise" I can see the 10dB/decade (...)
thermal noise for hand calculation is most simply expressed as a drain current noise Idn=4 k T Γ g_ms where g_ms is the source transconductance and Γ a factor smoothly varying from 1/2 in weak inversion to 2/3 in strong inversion. It is valid for all regions of operation. As of (...)
I am doing noise analysis of op amp using hspice. The value of inosie, outnoise , flicker noise and thermal noise obtained from analysis is zero. Why??
In Continuous Time Delta Sigma ADC, there are two options in Feedback DAC generally. (1) Current DAC (2) Voltage DAC or Resistive DAC Regarding thermal and flicker noise, (2) have advantage. Regarding calibration for multi level DAC, (1) have advantage. Regarding speed, (1) have advantage. (1) occupy large (...)
the LF noise is due to "flicker" which is a different effect from wide band thermal noise, hence two figures for designers to use, depending on their application. Frank
There may be a "sweet spot" between flicker and thermal, which would depend on the attributes of your particular technology. High Zout also amplifies RTN / RTS current noise if you have any of that. You have to feel out the box that you're in.
You need to show your exact circuit. I have used the AD8065/66 in the past with no problems. It can be a bit peaky at low gains and doesn't like capacitive loads. You need to define "noise". To me it is random, thermal or flicker noise but more likely in you case is an oscillation which (...)
I was trying to measure the noise of ONE transistor. I expected to see the flicker 10dB/dec line then the thermal noise floor.. But, actually, there's a step down in the floor at high freq .. I have no clue what is that.. The position of the step varies with the transistor length.( red = 1u (...)
Hi, We are designing few circuits in Hspice using Level 49 Library model for 180nm technology. We would like to know if we can measure the flicker, thermal, shot noises of the circuit using HSPICE. We know there is a .noise command using which we can calculate (...)
Hi, We are simulating some analog circuits using Hspice tool. We wanted to measure flicker noise and thermal noise. What all parameters we need to have in the model to perform the analysis? We know AF, KF, EF, NLEV, NOIMOD etc.. are few parameters. What should be their values and what (...)
Hi All, may I know how to reduce flicker and thermal noise in MOS devices. I see that flicker noise is inversely proportional to area, so increaseing area would reduce flicker noise. Is there anything that can be done (...)
HI everyone I want to simulate MOS noise which are thermal noise and flicker noise. for approch this noise simulate , I am going to use Monte carlo simulation in HSPICE. I put the device variation like below (...)
If you just wanna know thermal/flicker noise for most linear circuits, you could simply use "noise" simulation. I'm afraid that DFT is just for the simulation of quantization noise for sampling circuits.
1- In this topology what is the difference between the flicker noise of M3 & M1? What is the upconversion mechanism of these noises? 2- How the “ thermal noise” of tail current source affect the phase noise?
Hello all, As the process size of CMOS transistors decreases, does amplifier noise decrease as well? From what I can tell, the different noise types (shot/thermal/flicker) don't seem to have any obvious correlation to transistor size. Is there any trend relating these two quantities? If (...)
power domain OK? can you find some tone same as power? cap size OK? thermal noise and flicker noise of OP OK?
In the HSpice manual, FN is "output flicker noise" and ID is "output thermal noise due to channel". The RD etc are due to drain resistance etc. Total is the sum of them all (straight arithmetic sum because they are all in volts squared per Hertz). Keith.
Do you need to minimize the total integrated noise - Vrms or Irms? If so, depending on your BW, you should realize that the contribution of the flicker noise is quite insignificant compared to the contribution of the thermal noise in the total integrated (...)
1. The offset voltage the first things. The main sources of the one mainly input transistor. So, the first choose WxL. 2. There is no input voltage range. Depending on one you have to choose wether input NMOS or PMOS to use. 3. Also flicker noise and thermal noise are mainly depends on (...)
At what frequency are you operating the amplifier ? What is your noise cutoff frequency ? Based on that the circuit can be optimized for flicker or thermal noise or balanced between the two. Let me know. Also I am not sure why you are using the capacitor. The spikes seem to be short (...)