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Questions tagged [phase-noise]

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18 questions
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3 votes
1 answer
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https://www.ti.com/lit/an/sbaa661/sbaa661.pdf?ts=1745596081730&ref_url=https%253A%252F%252Fwww.google.com%252F This document talks about the impact of slew rate of reference source on PLL. Few ...
Dummy Dum's user avatar
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0 answers
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In the formula above , it is given that jitter due to flicker noise = n x timining variation / t since n/t = 1/f , shudnt the formula be timing variation / f then instead of timing variation * t (...
Dummy Dum's user avatar
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2 votes
1 answer
6k views

Trying to better understand phase noise units and characterize a device to compare with specs. I'm used to measuring in dBc/Hz, but the specs given are in dB(rad/√Hz)/m, which I guess is fairly ...
王景樱's user avatar
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1 vote
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The usual complications of phase noise in a practical system that I see mentioned are: If the RF input of a mixer contains an interferer close to the desired signal, then the interferer mixes with ...
Halleff's user avatar
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1 answer
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Originally, I was interested in the derivation of Equation 12.5 in the RF synthesis chapter of Razavi's textbook Design of phase-locked loops. I tried to look up the origin of it and found out a very ...
a360pilot's user avatar
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9 votes
2 answers
661 views

Suppose I have a carrier signal with low-ish RF frequency (a few MHz) that I can reasonably amplify with an op-amp. How can I estimate the added phase noise due to the amplifier? For microwave ...
sai's user avatar
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0 votes
1 answer
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I want to calculate the contribution of each phase-locked loop (PLL) module to the total phase noise that has been done in ADIsimPLL. I'm having trouble calculating the contribution of the loop filter ...
ocrdu's user avatar
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1 vote
0 answers
894 views

I have been trying to measure the phase noise of an oscillator with a homodyne interferometric measurement with an I Q mixer in the microwave domain. The output I and Q are digitized. So, after ...
Andrew Morton's user avatar
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3 votes
1 answer
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Just like FLOYD M. GARDNER said in the PhaseLock Techniques, 3rd Edition: "In light of that success in spectrum analyzers, a practitioner’s answer to the question above is: The spectrum of phase noise ...
Community's user avatar
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2 votes
0 answers
309 views

I am trying to calculate the phase jitter of a transmitter. A phase noise profile is given, say: ...
rksat's user avatar
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5 votes
1 answer
469 views

I have an ADC sampling a downconverted RF signal at fs. I obtain N=2^15 samples of the RF input signal "fcarrier + fs/10". The more I average, the more the entire noise floor shifts down (as expected,...
Community's user avatar
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I built a verilogA model for every block used in PLL, I replaced a verilogA model for VCO with a designed one but, I got oscillations imposed on the control voltage as shown below. Fdiv is the ...
Mohamed Ossama's user avatar
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5 votes
2 answers
470 views

I`ve got a capacitive vibration probe whose base capacitance may vary from 4 to 10 pF due to manufacturing/installation tolerances, whereas vibrations it detects can only alter its capacitance in sub-...
analogsystemsrf's user avatar
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I will promptly provide any detail or revise my question aimed at any feedback. Does the profile of phase-noise power spectrum density (PSD) vary with time? The conclusion may be that it won’t ...
wu yi's user avatar
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2 answers
158 views

What is the mean value of phase noise as a stochastic process? Where can I get a theoretical analysis of this topic?
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