대한전자공학회:학술대회논문집 (Proceedings of the IEEK Conference)

대한전자공학회 (The Institute of Electronics and Information Engineers)
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Design of Voltage Controlled Oscillator using Miller Effect

  • Choi Moon-Ho (School of Electronic and Computer Engineering, Chungbuk Nat'l Univ.) ;
  • Kim Yeong-Seuk (School of Electronic and Computer Engineering, Chungbuk Nat'l Univ.)
  • 발행 : 2004.08.01
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초록

A new wide-band VCO topology using Miller capacitance is proposed. Contrary to conventional VCO using the Miller capacitance where the variable amplifier gain is negative, the proposed VCO uses both the negative and positive variable amplifier gain to enhance the frequency tuning range significantly. The proposed VCO is simulated using HSPICE. The simulations show that 410MHz and 220MHz frequency tuning range are obtained using the negative .and positive variable amplifier gain, respectively. The tuning range of the proposed VCO is $23\%$ of the center frequency(2.8GHz). The phase noise is -104dBc/Hz at 1MHz offset by simple model. The operating current is only 3.84mA at 2.5V power supply.

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