A Fully Integrated Spread Spectrum Clock Generator Using a Dual-Path Loop Filter

2006 ◽  
Author(s):  
Yao-Huang Kao ◽  
Yi-Bin Hsieh
Keyword(s):  
Spread Spectrum ◽  
Clock Generator ◽  
Loop Filter ◽  
Fully Integrated

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.

A 3.5 GHz Spread-Spectrum Clock Generator With a Memoryless Newton-Raphson Modulation Profile

2012 ◽  
Vol 47 (5) ◽  
pp. 1199-1208 ◽  
Author(s):  
Sewook Hwang ◽  
Minyoung Song ◽  
Young-Ho Kwak ◽  
Inhwa Jung ◽  
Chulwoo Kim
Keyword(s):  
Spread Spectrum ◽  
Clock Generator ◽  
Newton Raphson
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