A dual-band frequency synthesizer for CMMB application with low phase noise
نویسندگان
چکیده
A wide-band frequency synthesizer with low phase noise is presented. The frequency tuning range is from 474 to 858 MHz which is compatible with U-band CMMB application while the S-band frequency is also included. Three VCOs with selectable sub-band are integrated on chip to cover the target frequency range. This PLL is fabricated with 0.35 m SiGe BiCMOS technology. The measured result shows that the RMS phase error is less than 1 and the reference spur is less than –60 dBc. The proposed PLL consumes 20 mA current from a 2.8 V supply. The silicon area occupied without PADs is 1.17 mm.
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