Low-Voltage, Low-Phase-Noise Ring Voltage-Controlled Oscillator Using $1/ f$-Noise Reduction Techniques
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概要
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To improve the phase noise of a ring voltage-controlled oscillator (VCO), we describe two $1/ f$-noise reduction techniques, which are a switched bias circuit (SBC) and a current source (CS) operating in the triode region. The ring VCO utilizing the $1/ f$-noise reduction techniques was fabricated by 0.18-μm complementary metal–oxide–semiconductor (CMOS) technology, and it achieved 1 GHz oscillation, $-68$ dBc/Hz at a 100 kHz offset, and 710 μW power dissipation using a 1 V power supply. The proposed SBC and the CS operating in the triode region reduced the phase noise of the ring VCO by 3 and 7 dB, respectively. A phase-locked loop (PLL) implemented by the proposed ring VCO achieved 1 GHz oscillation, a $-171$ dBc/Hz figure of merit (FOM), and 1.2 mW power dissipation at a supply voltage of 1 V.
- 2007-04-30
著者
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Iwata Atsushi
Graduate School Of Advanced Sciences Of Matter Hiroshima University
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Sasaki Mamoru
Graduate School Of Advanced Sciences Of Matter Hiroshima University
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Yoshida Takeshi
Graduate School Of Advanced Sciences Of Matter Hiroshima University
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Ishida Naoya
Graduate School Of Advanced Sciences Of Matter Hiroshima University
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Ishida Naoya
Graduate School of Advanced Sciences of Matter, Hiroshima University, 1-3-1 Kagamiyama, Higashihiroshima, Hiroshima 739-8530, Japan
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