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Top-Down Design of a Low-Power Multi-Channel 2.5-Gbit/s/Channel Gated Oscillator Clock-Recovery Circuit

By Paul Muller, See Profile, Armin Tajalli, S. M. Atarodi and Yusuf LeblebiciÉcole Polytechnique, Fédérale Lausanne, Paul Muller, Armin Tajalli, Mojtaba Atarodi and Yusuf Leblebici


We present a complete top-down design of a low-power multi-channel clock recovery circuit based on gated current-controlled oscillators. The flow includes several tools and methods used to specify block constraints, to design and verify the topology down to the transistor level, as well as to achieve a power consumption as low as 5mW/Gbit/s. Statistical simulation is used to estimate the achievable bit error rate in presence of phase and frequency errors and to prove the feasibility of the concept. VHDL modeling provides extensive verification of the topology. Thermal noise modeling based on well-known concepts delivers design parameters for the device sizing and biasing. We present two practical examples of possible design improvements analyzed and implemented with this methodology. 1

Year: 2005
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