scholarly journals A Low-Power and High-Precision Spread Spectrum Clock Generator for Serial Advanced Technology Attachment Applications Using Two-Point Modulation

2009 ◽  
Vol 51 (2) ◽  
pp. 245-254 ◽  
Author(s):  
Yao-Huang Kao ◽  
Yi-Bin Hsieh
Keyword(s):  
Low Power ◽  
High Precision ◽  
Spread Spectrum ◽  
Advanced Technology ◽  
Clock Generator ◽  
Serial Advanced Technology Attachment

scholarly journals A 3.9 μs Settling-Time Fractional Spread-Spectrum Clock Generator Using a Dual-Charge-Pump Control Technique for Serial-ATA Applications

2015 ◽  
Vol 2015 ◽  
pp. 1-13
Author(s):  
Takashi Kawamoto ◽  
Masato Suzuki ◽  
Takayuki Noto
Keyword(s):  
Spread Spectrum ◽  
Initial Period ◽  
Charge Pump ◽  
Settling Time ◽  
Advanced Technology ◽  
Control Technique ◽  
Signal Frequency ◽  
Clock Generator ◽  
Loop Filter ◽  
Serial Advanced Technology Attachment

A low-jitter fractional spread-spectrum clock generator (SSCG) utilizing a fast-settling dual-charge-pump (CP) technique is developed for serial-advanced technology attachment (SATA) applications. The dual-CP architecture reduces a design area to 60% by shrinking an effective capacitance of a loop filter. Moreover, the settling-time is reduced by 4 μs to charge a current to the capacitor by only main-CP in initial period in settling-time. The SSCG is fabricated in a 0.13 μm CMOS and achieves settling time of 3.91 μs faster than 8.11 μs of a conventional SSCG. The random jitter and total jitter at 250 cycles at 1.5 GHz are less than 3.2 and 10.7 psrms, respectively. The triangular modulation signal frequency is 31.5 kHz and the modulation deviation is from −5000 ppm to 0 ppm at 1.5 GHz. The EMI reduction is 10.0 dB. The design area and power consumption are 300 × 700 μm and 18 mW, respectively.

scholarly journals High accuracy, Low Power Spread Spectrum Clock Generator to Reduce EMI for Automotive Applications

2014 ◽  
Vol 3 (6) ◽  
pp. 404-409
Author(s):  
Dongsoo Lee ◽  
Jinwook Choi ◽  
Seongjin Oh ◽  
SangYun Kim ◽  
Kang-Yoon Lee
Keyword(s):  
Low Power ◽  
Spread Spectrum ◽  
High Accuracy ◽  
Clock Generator ◽  
Automotive Applications

A high-precision spread spectrum clock generator based on a fractional-N phase locked loop

2013 ◽  
Vol 74 (3) ◽  
pp. 661-665
Author(s):  
D. B. Yen Nguyen ◽  
J. A. Cartwright ◽  
Young-Hun Ko ◽  
Sang-Gug Lee ◽  
D. S. Ha
Keyword(s):  
High Precision ◽  
Spread Spectrum ◽  
Phase Locked Loop ◽  
Clock Generator

Design of the A/D Conversion Circuit Based on ARM for the Time-Difference Method Ultrasonic Flowmeter

2011 ◽  
Vol 383-390 ◽  
pp. 516-523
Author(s):  
Xing Hong Zhang ◽  
Hui Zhang ◽  
Xi Hou Chen ◽  
Xian Quan Wang ◽  
Ji Qin Feng
Keyword(s):  
High Resolution ◽  
Low Power ◽  
Data Acquisition ◽  
High Precision ◽  
Difference Method ◽  
Data Acquisition System ◽  
Time Difference ◽  
Ultrasonic Flowmeter ◽  
Advanced Technology ◽  
Acquisition System

Because the high precision ultrasonic flowmeter has shortcomings of expensive, the A/D conversion circuit based on ARM for the time-difference method ultrasonic flowmeter is designed. On the basis of time-difference method ultrasonic flowmeter theory and the domestic and overseas advanced technology, a cost-effective low-power 12-bit ADC12DL040 chip and ARM processor LPC2138 are chosen for the design. According to the data acquisition system issues of the time- difference method ultrasonic flowmeter, the two-channel 12-bit low-power monolithic CMOS analog-digital conversion chip is adopted to design the nanosecond-level high-resolution data acquisition system. In this paper, the A/D chip peripheral pin circuit design is given, hardware structure diagram and software flowchart are also given. The input frequency of ultrasonic signal is 400 kHz and the sampling frequency is 8MHz.The experimental results indicated that the designed A/D conversion circuit is able to accomplish the high-speed and high-resolution ultrasonic echo signal sampling; the minimum resolution time of A/D conversion circuit is 0.305ns. The physical map of A/D conversion circuit for the time-difference method ultrasonic flowmeter is presented. The design of A/D conversion circuit for time-difference method ultrasonic flowmeter not only lower the production cost, but also lays a solid foundation for the research of low-cost and high-precision time-difference method ultrasonic flowmeter.

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