1.5 Gbps, 5150 ppm spread spectrum SerDes PHY with a 0.3 mW, 1.5 Gbps level detector for serial ATA

Abstract

We have successfully developed a 5150 ppm spread spectrum serializer/deserializer (SerDes) physical layer (PHY) chip compliant with the serial AT attachment (ATA), The device was fabricated by a 0.13 /spl mu/m, 1.5 V CMOS process and includes a self-running, pulse-swallow phase locked loop (PLL) to generate the transmit (TX) carrier, a triple loop tracking the PLL to recover the receive (RX) clock, and a 0.3 mW current-crossover level detector to detect the 1.5 Gbps carrier for initial communication.