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

Table 1

Comparison table.

Item	Unit	[3]	[5]	[2]	[4]	This work
Output frequency	GHz	1.5	1.5	1.5	1.5	1.5
Random jitter; @ 250 cycles	Ps rms	<3.3	—	5	3.2	<3.2
Total jitter; @ 250 cycles	ps rms	<3.6	—	—	16.8	<10.7
EMI reduction	dB	10.0	8.2	—	9.8	10.0
Locking-time	µs	30	4.2	50	6.3	3.91
Technology	µm	0.13	0.13	0.18	0.18	0.13
Power	mW	30	12	27	77	18
Area	mm^2	0.3570	0.1120	0.2112	0.3100	0.2100