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An IC for 20 Gb/s clock recovery and data decision was realised using 0.3 ??m gate-length QW-HEMTs. A narrow-band regenerative frequency divider with on-chip resonator filters is used for the clock recovery. The parallel processing concept is accepted for the data decision. The complex IC was tested on wafer using 5 and 10-Gb/s input data. The desired 10-GHz clock signal and regenerated data signals...
A monolithically integrated clock recovery (CR) circuit making use of the phase-locked loop (PLL) circuit technique and enhancement/depletion AlGaAs/GaAs quantum well high electron mobility transistors (QW-HEMTs) with gate lengths of 0.3 μm has been realized. A novel preprocessing circuit was used. In the PLL a fully-balanced varactorless VCO has been introduced. The VCO has a centre oscillating frequency...
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