Proceedings of the KIEE Conference (대한전기학회:학술대회논문집)

The Korean Institute of Electrical Engineers (대한전기학회)
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Design of a Wide-Band, Low-Noise CMOS VCO for DTV Tuner Applications

DTV 튜너 응용을 위한 광대역 저잡음 CMOS VCO 설계

  • Kim, Y.J. (Dept. of Electronic Engineering, University of Incheon) ;
  • Yu, J.B. (Dept. of Electronic Engineering, University of Incheon) ;
  • Ko, S.O. (Dept. of Electronic Engineering, University of Incheon) ;
  • Kim, K.H. (Dept. of Electronic Engineering, University of Incheon) ;
  • Yu, C.G. (Dept. of Electronic Engineering, University of Incheon)
  • Published : 2007.10.26
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Abstract

Since the digital TV signal band is very wide ($54{\sim}806MHz$), the VCO used in the frequency synthesizer must also have a wide frequency tuning range. Multiple LC VCOs have been used to cover such wide frequency band. However, the chip area increases due to the increased number of integrated inductors. In this paper, a scheme is proposed to cover the full band using only one VCO. The RF VCO block designed using a 0.18um CMOS process consists of a wideband LC VCO, five divide-by-2 circuits and several buffers. The simulation results show that the designed circuit has a phase noise at 10kHz better than -87dBc/Hz throughout the signal band and consumes 10mA from a 1.8V supply.

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