A 140 Mb/s to 1.96 Gb/s Referenceless Transceiver With 7.2 $\mu$s Frequency Acquisition Time

This paper presents a design of a wide-range transceiver without an external reference clock. The self-biased and multi-band PLL with self-initialization technique is used for the wide-operating range of 140 Mb/s to 1.96 Gb/s and fast frequency acquisition time of 7.2 μs. A linear phase detector which has no dead-zone problem is proposed for a phase adjustment with a low-jitter performance. The RMS jitter of the recovered clock is 11.4 ps at 70 MHz operation. The overall transceiver consumes 388 mW at 2.5 V supply and occupies 3.41 mm
²
in a 0.25-μm 1P5M CMOS technology.