CMOS optical receiver chipset for gigabit Ethernet applications

نویسندگان

  • Sung-Eun Kim
  • Seong-Jun Song
  • Sung Min Park
  • Hoi-Jun Yoo
چکیده

This paper describes a 1.25-Gb/s simplified CMOS optical receiver chipset for Gigabit Ethernet applications, consisting of a transimpedance amplifier (TIA) and a clock and data recovery (CDR) circuit. The TIA takes a fully differential regulated cascode configuration, demonstrating 700MHz bandwidth for 1pF photodiode capacitance, 80dBΩ transimpedance gain, -17dBm sensitivity for BER of 10-12, and 27mW power consumption. In our design, the postamplifier is omitted due to the large voltage swing of the TIA and to the high sensitivity of the proposed CDR. The CDR takes a half-rate clock technique and thus removes the necessity of a 1:2 demultiplexer. It achieves 40mVpp sensitivity due to the high sensitivity phase detector. The RMS clock jitter and data jitter are measured to be 3.9psrms and 20.2psrms, respectively. Two chips dissipate 127mW from a single 2.5V supply.

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تاریخ انتشار 2003