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Low cost 2.4-GHz VCO design in 0.18-㎛ Mixed-signal CMOS Process for WSN applications

저 가격 0.18-㎛ 혼성신호 CMOS공정에 기반한 WSN용 2.4-GHz 밴드 VCO설계

  • Jhon, Heesauk (Department of Electronics, Information and Communication, Mokpo National University) ;
  • An, Chang-Ho (Department of Digital Electronics, Dealim University College) ;
  • Jung, Youngho (Department of Electronic and Electrical Engineering, Daegu University)
  • Received : 2020.02.10
  • Accepted : 2020.02.14
  • Published : 2020.02.29

Abstract

This paper demonstrated a voltage-controlled oscillator (VCO) using cost-effective (1-poly 6-metal) mixed signal standard CMOS process. To have the high-quality factor inductor in LC resonator with thin metal thickness, patterned-ground shields (PGS) was adopted under the spiral to effectively reduce the ac current of low resistive Si substrate. And, because of thin top-metal compared with that of RF option (2 ㎛), we make electrically connect between the top metal (M6) and the next metal (M5) by great number of via array along the metal traces. The circuit operated from 2.48 GHz to 2.62 GHz tuned by accumulation-mode varactor device. And the measured phase noise of LC VCO has -123.7 dBc/Hz at 1MHz offset at 2.62 GHz and the dc-power consumption shows 2.07 mW with 1.8V supply voltage, respectively.

Keywords

References

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