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A multi-band frequency synthesizer for DVB-H

Saeedi, S ; Sharif University of Technology | 2009

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  1. Type of Document: Article
  2. Publisher: 2009
  3. Abstract:
  4. A fully integrated multi-band frequency synthesizer for Inphase and Quadrature local oscillator signal generation in Digital Video Broadcasting to Handheld receivers is presented. In the proposed PLL-based integer-N synthesizer, all of the allocated frequencies for DVB tuners, in VHF, UHF and L bands, are generated. Two voltage controlled oscillators cover a frequency range of 1880-3632 MHz by using switched-capacitor banks. The VCO frequency is divided by 2, 4 and 16 to generate the quadrature signals at the synthesizer output. A fast adaptive frequency calibration block selects the closest VCO frequency to the target frequency by setting the capacitor bank control code prior to the start of phase lock. A programmable charge pump is used to reduce variations in PLL characteristics over the wide frequency range. The synthesizer has been fabricated in a 0.18um CMOS technology and the die area is 2.1×1.8 mm 2. It consumes 29mA from a 1.8v power supply. Measurements show that the synthesizer quadrature output phase noise for UHF and VHF bands is lower than -83 dBc/Hz and -133dBc/Hz at 10 kHz and 1.45 MHz offset, respectively. © 2009 Praise Worthy Prize S.r.l
  5. Keywords:
  6. DVB-H ; Frequency synthesizer ; Multi band ; PLL ; VCO
  7. Source: International Review of Electrical Engineering ; Volume 4, Issue 5 , 2009 , Pages 1110-1116 ; 18276660 (ISSN)