Power Consumption Change in Transistor Ratio of Ring Voltage Controlled Oscillator

링 전압 제어 발진기의 트랜지스터 비율에 따른 소모 전력 변화

Moon, Dongwoo;Shin, Hooyoung;Lee, Milim;Kang, Inseong;Lee, Changhyun;Park, Changkun

  • Received : 2015.10.02
  • Accepted : 2015.12.29
  • Published : 2016.02.29


In this paper, a 5.08 GHz Ring Voltage Controlled Oscillator(Ring VCO) was implemented using $0.18{\mu}m$ standard CMOS technology. The proposal Ring VCO is 3-stage structure. This research confirmed that the each stage's different transistor size ratio influence the current change and alter power consumption consequentially. This circuit is formed to control the current thereby adding the Current Mirror and to tune the frequency by supplying control voltage. It has an 65.5 %(1.88~5.45 GHz) tuning range. The measured output power is -0.30 dBm. The phase noise is -87.50 dBc/Hz @1 MHz offset with operating frequency of 5.08 GHz fundamental frequency. The total power consumption of Ring VCO is 31.2 mW with 2.4 V supply voltage.


Inverter;Ring VCO;Wide Tuning Range;Low Phase Noise;Low Power Consumption


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Supported by : National Research Foundation of Korea(NRF)