Design of a Low-Voltage, Low-Power, High-Frequency CMOS Current-Mode VCO Circuit by Using 0.6μm MOS Devices (Special Section on Analog Circuit Techniques for System-on-Chip Integration)
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概要
- 論文の詳細を見る
We have designed a new current-mode low-voltage, low-power, high-frequency CMOS VCO circuit. The main purpose of this new circuit is to obtain operational capabilities with more than 1 GHz oscillation frequency from one battery cell. The current-mode approach was adopted throughout the circuit design to achieve this. New differential-type delay cells in the current-mode operation enable extremely low supply voltage operation and superior linearity between the oscillation frequency and control voltage of a ring oscillator. A design which combines the transitions of each delay cell output enables the VCO's high-frequency operation. To obtain a sufficient current level at output, a current amplifier with a small amount of positive feedback is used. The unnecessary generation of spectral components caused by mismatched time delay of delay cells in a ring-oscillator, which is an inherent problem of the VCO in a ring-oscillator form, is also analyzed. The characteristics of the designed VCO were examined by the SPICE circuit simulation using standard CMOS 0.6μm devices. Operation with a 1 V power supply, 1 GHz oscillation frequency, and 5.7mW power dissipation was verified.
- 社団法人電子情報通信学会の論文
- 1997-02-25
著者
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SUGIMOTO Yasuhiro
Department of Physics, Kyoto University
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Sugimoto Y
Chuo Univ. Tokyo Jpn
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UENO Takeshi
Department of Molecular Medicine, School of Medicine, Kitasato University
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Tsuji Takaaki
Department Of Orthopaedic Surgery Douaikai Hospital
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Tsuji Takaaki
Department Of Electrical And Electronics Engineering Chuo University
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Ueno Takeshi
Department Of Electrical And Electronics Engineering Chuo University
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Sugimoto Yasuhiro
Department Of Electrical And Electronic Engineering Chuo University
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SUGIMOTO Yasuhiro
Department of EECE, Chuo University
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