CORRELATION BETWEEN PHASE AND AMPLITUDE NOISES, AND 1/F PHASE NOISE REDUCTION METHODS IN OSCILLATORS AND PLL(PHASE-LOCKED LOOP) SYSTEM

2001 ◽  
Author(s):  
TADASHI YAMOTO ◽  
HARUMITU KANO ◽  
KEIJI TAKAGI
Keyword(s):  
Noise Reduction ◽  
Phase Noise ◽  
Phase Locked Loop ◽  
Loop System ◽  
Reduction Methods

Phase noise reduction by optical phase-locked loop for a coherent bichromatic laser based on the injection-locking technique

2018 ◽  
Vol 89 (1) ◽  
pp. 013103 ◽  
Author(s):  
C. F. Wu ◽  
X. S. Yan ◽  
J. Q. Huang ◽  
J. W. Zhang ◽  
L. J. Wang
Keyword(s):  
Noise Reduction ◽  
Phase Noise ◽  
Phase Locked Loop ◽  
Injection Locking ◽  
Optical Phase

scholarly journals On the Running Noise of Toothed Belt Drive : 2nd Report, Influence of Running Condition and Some Noise Reduction Methods

1971 ◽  
Vol 37 (293) ◽  
pp. 203-211
Author(s):  
Aizoh KUBO ◽  
Toshiaki ANDO ◽  
Susumu SATO ◽  
Toshio AIDA ◽  
Takeshi HOSHIRO
Keyword(s):  
Noise Reduction ◽  
Belt Drive ◽  
Toothed Belt ◽  
Reduction Methods

COMPARISON OF MONOPOLE AND DIPOLE NOISE REDUCTION METHODS

2020 ◽  
Vol 4 (67) ◽  
pp. 153-160
Author(s):  
Oleg I. Polivaev ◽  
◽  
Alexey N. Kuznetsov ◽  
Dmitriy Yu. Terekhov ◽  
Viktor V. Trufanov ◽  
...  
Keyword(s):  
Noise Reduction ◽  
Reduction Methods

Design and analysis of a low noise CMOS charge pump phase locked loop circuit

2021 ◽  
pp. 2140002
Author(s):  
Yanbo Chen ◽  
Shubin Zhang
Keyword(s):  
Phase Noise ◽  
Supply Voltage ◽  
Charge Pump ◽  
Phase Locked Loop ◽  
Low Noise ◽  
Cmos Process ◽  
Voltage Controlled Oscillator ◽  
Output Frequency ◽  
Power Supply Voltage ◽  
Supply Noise

Phase Locked Loop (PLL) circuit plays an important part in electronic communication system in providing high-frequency clock, recovering the clock from data signal and so on. The performance of PLL affects the whole system. As the frequency of PLL increases, designing a PLL circuit with lower jitter and phase noise becomes a big challenge. To suppress the phase noise, the optimization of Voltage Controlled Oscillator (VCO) is very important. As the power supply voltage degrades, the VCO becomes more sensitive to supply noise. In this work, a three-stage feedforward ring VCO (FRVCO) is designed and analyzed to increase the output frequency. A novel supply-noise sensing (SNS) circuit is proposed to suppress the supply noise’s influence on output frequency. Based on these, a 1.2 V 2 GHz PLL circuit is implemented in 110 nm CMOS process. The phase noise of this CMOS charge pump (CP) PLL is 117 dBc/Hz@1 MHz from test results which proves it works successfully in suppressing phase noise.

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