Title :
Clock and data recovery IC for 40-Gb/s fiber-optic receiver
Author :
Georgiou, George ; Baeyens, Yves ; Chen, Young-ken ; Gnauck, Alan H. ; Gröpper, Carsten ; Paschke, Peter ; Pullela, Rajasekhar ; Reinhold, Mario ; Dorschky, Claus ; Mattia, John-Paul ; Von Mohrenfels, Timo Winkler ; Schulien, Christoph
Author_Institution :
Lucent Technol. Bell Labs, Holmdel, NJ, USA
fDate :
9/1/2002 12:00:00 AM
Abstract :
The integrated clock and data recovery (CDR) circuit is a key element for broad-band optical communication systems at 40 Gb/s. We report a 40-Gb/s CDR fabricated in indium-phosphide heterojunction bipolar transistor (InP HBT) technology using a robust architecture of a phase-locked loop (PLL) with a digital early-late phase detector. The faster InP HBT technology allows the digital phase detector to operate at the full data rate of 40 Gb/s. This, in turn, reduces the circuit complexity (transistor count) and the voltage-controlled oscillator (VCO) requirements. The IC includes an on-chip LC VCO, on-chip clock dividers to drive an external demultiplexer, and low-frequency PLL control loop and on-chip limiting amplifier buffers for the data and clock I/O. To our knowledge, this is the first demonstration of a mixed-signal IC operating at the clock rate of 40 GHz. We also describe the chip architecture and measurement results.
Keywords :
III-V semiconductors; bipolar integrated circuits; data communication equipment; digital communication; high-speed integrated circuits; indium compounds; mixed analogue-digital integrated circuits; optical fibre communication; optical receivers; synchronisation; 40 GHz; 40 Gbit/s; CDR circuit; InP; InP HBT technology; broadband optical communication systems; chip architecture; digital early-late phase detector; fiber-optic communication receiver; integrated clock/data recovery circuit; low-frequency PLL control loop; mixed-signal IC; on-chip LC VCO; on-chip clock dividers; on-chip limiting amplifier buffers; phase-locked loop; voltage-controlled oscillator; Circuits; Clocks; Detectors; Heterojunction bipolar transistors; Indium phosphide; Optical fiber communication; Optical receivers; Phase detection; Phase locked loops; Voltage-controlled oscillators;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.2002.801186