A data recovery circuit for burst signal using 440 MHz CMOS direct phase controlled VCO

A clock and data recovery circuit is a key element in communication systems for realizing high speed signal transfers. In passive optical transmission systems, a data recovery circuit for burst data is indispensable. A burst-mode clock and data recovery circuit using gated VCOs has been reported. We have proposed data recovery circuits for a continuous bit stream using the direct phase controlled VCO (DPC-VC0) where the oscillation phase of the VCO is directly controlled by the trigger signal extracted from the input data. This paper proposes a data recovery circuit for burst data using the DPC-VCO in a 0.5um CMOS process.