Questions tagged [phase-noise]
The phase-noise tag has no usage guidance.
15
questions
0
votes
0
answers
79
views
Frequency offset for phase noise measurement
I've recently designed an oscillator for a frequency range of 80 - 100MHz. I would like to analyse the phase noise of the oscillator. From my knowledge of "phase noise", it is the power of a ...
- 33
9
votes
2
answers
420
views
Phase noise of op-amp
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 ...
- 1,416
1
vote
0
answers
441
views
Conversion of phase noise unit from V^2/Hz to rad^2/Hz
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 ...
- 11
2
votes
0
answers
192
views
How to interpolate phase noise curves?
I am trying to calculate the phase jitter of a transmitter. A phase noise profile is given, say:
...
- 21
0
votes
1
answer
422
views
How to calculate the phase noise contribution of an active loop filter in PLL
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 ...
- 1
1
vote
1
answer
3k
views
Phase noise units: dBc/Hz --> dB(rad/√Hz)
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 ...
0
votes
0
answers
91
views
why the control voltage of VCO in CP PLL oscillates?
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 ...
0
votes
0
answers
126
views
Does the profile of phase-noise power spectrum density (PSD) vary with time?
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 ...
- 41
0
votes
2
answers
96
views
The mean value of phase noise as a stochastic process
What is the mean value of phase noise as a stochastic process?
Where can I get a theoretical analysis of this topic?
- 41
2
votes
1
answer
235
views
Two details about phase noise have been confusing me for a long time. Hope to be resolved
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 ...
- 41
0
votes
1
answer
87
views
Single tone signal generation at microwave frequency with best phase noise and spurious performance
What is the best way to generate a single tone signal with best phase noise and spurious performance?
Is frequency multiplication the best way? single stage multiplication or multi stage ...
- 1
5
votes
1
answer
352
views
Can phase noise be averaged out?
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,...
- 1,306
4
votes
2
answers
378
views
Phase noise reduction in LC oscillator with a high-loss capacitor
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-...
- 307
4
votes
1
answer
206
views
A capacitor as loop filter of a DLL
I know that if a second order, type two PLL has only a capacitor as its loop filter, it is unstable because its phase margin would be zero. but why is it ok for a DLL to only have a capacitor as its ...
- 103
1
vote
1
answer
731
views
Error with phase noise to jitter calculation
I'm trying to get the jitter for an oscillator. The nominal frequency \$f_0\$ is 10 MHz, I'm integrating from 1 Hz to 100 kHz.
The specifications are given as "RF Output Phase Noise (SSB)", in dBc/Hz.
...
- 832