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A low-power oscillator mixer in 0.18-/spl mu/m CMOS technology

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8 Author(s)
To-Po Wang ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei ; Chia-Chi Chang ; Ren-Chieh Liu ; Ming-Da Tsai
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A downconversion double-balanced oscillator mixer using 0.18-mum CMOS technology is proposed in this paper. This oscillator mixer consists of an individual mixer stacked on a voltage-controlled oscillator (VCO). The stacked structure allows entire mixer current to be reused by the VCO cross-coupled pair to reduce the total current consumption of the individual VCO and mixer. Using individual supply voltages and eliminating the tail current source, the stacked topology requires 1.0-V low supply voltage. The oscillator mixer achieves a voltage conversion gain of 10.9 dB at 4.2-GHz RF frequency. The oscillator mixer exhibits a tuning range of 11.5% and a single-sideband noise figure of 14.5 dB. The dc power consumption is 0.2 mW for the mixer and 2.94 mW for the VCO. This oscillator mixer requires a lower supply voltage and achieves a higher operating frequency among recently reported Si-based self-oscillating mixers and mixer oscillators. The mixer in this oscillator mixer also achieves a low power consumption compared with recently reported low-power mixers

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Microwave Theory and Techniques, IEEE Transactions on  (Volume:54 ,  Issue: 1 )