scholarly journals A low supply voltage all-digital phase-locked loop with a bootstrapped and forward interpolation digitally controlled oscillator

IEEE Access ◽  
2021 ◽  
pp. 1-1
Author(s):  
Jen-Chieh Liu ◽  
Yu-Ping Li
2013 ◽  
Vol 5 (2) ◽  
pp. 128-132
Author(s):  
Marijan Jurgo

The paper reviews working principles of phase-locked loop and drawbacks of classical PLL structure in nanometric technologies. It is proposed to replace the classical structure by all-digital phase-locked loop structure. Authors described the main blocks of all-digital phase-locked loop (time to digital converter and digitally controlled oscillator) and overviewed the quantization noise arising in these blocks as well as its minimization strategies. The calculated inverter delay in 65 nm CMOS technology was from 8.64 to 27.71 ps and time to digital converter quantization noise was from −104.33 to −82.17 dBc/Hz, with tres = 8.64–27.71 ps, TSVG = 143–333 ps, FREF = 20–60 MHz. Article in Lithuanian. Santrauka Nagrinėjama fazės derinimo kilpa (FDK), jos veikimas, klasikinės struktūros FDK trūkumai nanometrinėse technologijose, galimi jų sprendimo būdai. Siūlomas perėjimas prie visiškai skaitmeninės fazės derinimo kilpos. Aprašomi pagrindiniai visiškai skaitmeninės FDK blokai – laikinis skaitmeninis keitiklis (LSK) ir skaitmeniniu būdu valdomas generatorius (SVG). Aptariamas LSK ir SVG atsirandantis kvantavimo triukšmas ir jo mažinimo priemonės. Apskaičiuota 65 nm KMOP technologijoje pasiekiama inverterio vėlinimo trukmė, lygi nuo 8,64 iki 27,71 ps, ir LSK triukšmo lygis, lygus nuo −104,33 iki −82,17 dBc/Hz, kai inverterio vėlinimo trukmė t res = 8,64–27,71 ps, SVG generuojamo signalo periodas TSVG = 143–333 ps, o atraminio signalo dažnis FREF = 20–60 MHz.


VLSI Design ◽  
2010 ◽  
Vol 2010 ◽  
pp. 1-11 ◽  
Author(s):  
Jun Zhao ◽  
Yong-Bin Kim

A low-power and low-jitter 12-bit CMOS digitally controlled oscillator (DCO) design is presented. The Low-Power CMOS DCO is designed based on the ring oscillator implemented with Schmitt trigger inverters. The proposed DCO circuit uses control codes of thermometer type to reduce jitters. Performance of the DCO is verified through a novel All Digital Phase-Locked Loop (ADPLL) designed with a unique lock-in process by employing a time-to-digital converter, where both the frequency of the reference clock and the delay between DCO_output and DCO_clock is measured. A carefully designed reset process reduces the phase acquisition process to two cycles. The ADPLL was implemented using the 32 nm Predictive Technology Model (PTM) at 0.9 V supply voltage, and the simulation results show that the proposed ADPLL achieves 10 and 2 reference cycles of frequency and phase acquisitions, respectively, at 700 MHz with less than 67 ps peak-to-peak jitter. The DCO consumes 2.2 mW at 650 MHz with 0.9 V power supply.


2019 ◽  
Vol 82 (1) ◽  
Author(s):  
Florence Choong ◽  
Mamun Ibne Reaz ◽  
Mohamad Ibrahim Kamaruzzaman ◽  
Md. Torikul Islam Badal ◽  
Araf Farayez ◽  
...  

Digital controlled oscillator (DCO) is becoming an attractive replacement over the voltage control oscillator (VCO) with the advances of digital intensive research on all-digital phase locked-loop (ADPLL) in complementary metal-oxide semiconductor (CMOS) process technology. This paper presents a review of various CMOS DCO schemes implemented in ADPLL and relationship between the DCO parameters with ADPLL performance. The DCO architecture evaluated through its power consumption, speed, chip area, frequency range, supply voltage, portability and resolution. It can be concluded that even though there are various schemes of DCO that have been implemented for ADPLL, the selection of the DCO is frequently based on the ADPLL applications and the complexity of the scheme. The demand for the low power dissipation and high resolution DCO in CMOS technology shall remain a challenging and active area of research for years to come. Thus, this review shall work as a guideline for the researchers who wish to work on all digital PLL.


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