RF Signal Generator Based on Time-to-Analog Converter in 0.18 μm Complementary Metal Oxide Semiconductor
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概要
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In this paper, we propose an inductorless scalable RF signal generator from a digital pulse signal. Conventionally, digital-to-analog converters (DACs) generate analog signals by summing quantized voltage steps digitally. However, the DACs are not suitable for low-voltage operation in the fine complementary metal oxide semiconductor (CMOS) IC because the required quantized step becomes smaller as the CMOS process becomes finer. To overcome this, a time-to-analog conversion technique is suggested. The suggested circuit can advance the time step resolution and the low-voltage operation is possible. A prototypal time-to-analog circuit that generates sinusoidal waveforms from digital RF input was fabricated using 0.18-μm CMOS technology. The frequency was 128 MHz and the output power was $-6.6$ dBm. The output levels of the second and third harmonics were $-23$ and $-37$ dBc, respectively. The time-to-analog conversion technology suggested could become more attractive in the future if finer CMOS technologies that can realize higher time resolution are applied.
- 2010-04-25
著者
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Amakawa Shuhei
Integrated Research Institute Tokyo Institute Of Technology
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Shuhei Amakawa
Integrated Research Institute, Tokyo Institute of Technology, 4259-R2-17 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Nakano Kazuo
Integrated Research Institute, Tokyo Institute of Technology, 4259-R2-17 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Ishihara Noboru
Integrated Research Institute, Tokyo Institute of Technology, 4259-R2-17 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Kazuya Masu
Integrated Research Institute, Tokyo Institute of Technology, 4259-R2-17 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Kazuo Nakano
Integrated Research Institute, Tokyo Institute of Technology, 4259-R2-17 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Noboru Ishihara
Integrated Research Institute, Tokyo Institute of Technology, 4259-R2-17 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan
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Ishihara Noboru
Integrated Research Institute, Tokyo Institute of Technology
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