Progress Towards A Low Phase Noise Source For Fibre Optic Sensors

1986 ◽  
Author(s):  
J. P. Dakin ◽  
P. B. Withers
Keyword(s):  
Phase Noise ◽  
Noise Source ◽  
Fibre Optic ◽  
Low Phase Noise

Power Efficient Implementation of Low Noise CMOS LC VCO using 32nm Technology for RF Applications

2018 ◽  
Vol 6 (8) ◽  
pp. 53
Author(s):  
Shitesh Tiwari ◽  
Sumant Katiyal ◽  
Parag Parandkar
Keyword(s):  
Power Consumption ◽  
Phase Noise ◽  
Tuning Range ◽  
Low Voltage ◽  
Performance Comparison ◽  
Low Noise ◽  
Center Frequency ◽  
Voltage Controlled Oscillator ◽  
Low Phase Noise ◽  
Lc Vco

Voltage Controlled Oscillator (VCO) is an integral component of most of the receivers such as GSM, GPS etc. As name indicates, oscillation is controlled by varying the voltage at the capacitor of LC tank. By varying the voltage, VCO can generate variable frequency of oscillation. Different VCO Parameters are contrasted on the basis of phase noise, tuning range, power consumption and FOM. Out of these phase noise is dependent on quality factor, power consumption, oscillation frequency and current. So, design of LC VCO at low power, low phase noise can be obtained with low bias current at low voltage.  Nanosize transistors are also contributes towards low phase noise. This paper demonstrates the design of low phase noise LC VCO with 4.89 GHz tuning range from 7.33-11.22 GHz with center frequency at 7 GHz. The design uses 32nm technology with tuning voltage of 0-1.2 V. A very effective Phase noise of -114 dBc / Hz is obtained with FOM of -181 dBc/Hz. The proposed work has been compared with five peer LC VCO designs working at higher feature sizes and outcome of this performance comparison dictates that the proposed work working at better 32 nm technology outperformed amongst others in terms of achieving low Tuning voltage and moderate FoM, overshadowed by a little expense of power dissipation. 

Design of wideband discrete VCO with low phase noise

2011 ◽  
Vol 25 (9) ◽  
pp. 817-822
Author(s):  
Zhiqiang Wei ◽  
Zushen Liu ◽  
Wu Huang ◽  
Shu Liu
Keyword(s):  
Phase Noise ◽  
Low Phase Noise

X-Band Feedback Type Miniaturized Oscillator Design with Low Phase Noise Based on Eighth Mode SIW Bandpass Filter

2021 ◽  
pp. 1-1
Author(s):  
Samundra K. Thapa ◽  
Baichuan Chen ◽  
Adel Barakat ◽  
Kuniaki Yoshitomi ◽  
Ramesh K. Pokharel
Keyword(s):  
Phase Noise ◽  
Bandpass Filter ◽  
Feedback Type ◽  
X Band ◽  
Low Phase Noise

scholarly journals Optimizing noise characteristics of mode-locked Yb-doped fiber laser using gain-induced RIN-transfer dynamics

2021 ◽  
Vol 9 ◽  
Author(s):  
Jiangshuoxue Han ◽  
Yang Liu ◽  
Zejiang Deng ◽  
Gehui Xie ◽  
Daping Luo ◽  
...  
Keyword(s):  
Fiber Laser ◽  
Phase Noise ◽  
Transfer Functions ◽  
Dopant Concentration ◽  
Corner Frequency ◽  
Dispersion Management ◽  
Noise Characteristics ◽  
Laser Design ◽  
Parameter Dependent ◽  
Low Phase Noise

Abstract Gain-parameter-dependent transfer functions and phase-noise performances in a mode-locked Yb-doped fiber laser are measured in this study. It is discovered that the corner frequency in the amplitude and phase domains is determined by the absorption coefficient of the gain fiber, when the total absorption and other cavity parameters are fixed. This shows that an oscillator using gain fiber with higher dopant concentration accumulates more phase noise. Furthermore, we present net cavity dispersion-dependent transfer functions to verify the effect of dispersion management on the frequency response. We derive a guideline for optimizing mode-locked fiber laser design to achieve low phase noise and timing jitter.

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