480 MHz 10-tap Clock Generator Using Edge-Combiner DLL for USB 2.0 Applications

Table 1

Comparison table.

Item	Unit	Proposed clock generator	Conventional PLL in Figure 2
Structure	—	2 ECDLL + 1 DLL	1 PLL
Frequency	MHz	480	480
Locking-time	μs	3.5	10.0
Output jitter	ps	0.8	2.0
Technology	nm	90	90
Power	mW	1.3	3.8
Area	μm^2	200 × 225	200 × 500