A Fractional Phase Interpolator Using Two-Step Integration for Frequency Multiplication and Direct Digital Synthesis
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概要
- 論文の詳細を見る
We propose a new phase interpolator that provides precise fractional phase pulses without the need to adjust circuit constants. The variable phases are produced by detecting thecoincidence of two voltages, the ramp wave and the threshold voltage. The new phase interpolator can keep the same ramp wave slope and the same threshold voltage for different output phases. This significantly reduces the power dissipation of the voltage comparator. This phase interpolator can be applied to various timing circuits and clock generators, such as frequency multipliers and direct digital synthesizers. We present a novel frequency doubler, a novel frequency tripler, a direct digital synthesizer (DDS), and a novel wideband DDS (WDDS) as applications of our new phase interpolator, which uses 0.35-mm CMOS process technology. Experimental results confirm the functionarity of the new phase interpolator. An 8-bit complete DDS IC dissipates only 2.1 mA at a 50-MHz clock rate and a supply voltage of 2.8V.
- 社団法人電子情報通信学会の論文
- 2003-02-01
著者
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YAMAGUCHI Yo
NTT Network Innovation Laboratory
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MURAGUCHI Masahiro
NTT Photonics Laboratories, NTT Corporation
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Muraguchi Masahiro
Ntt Photonics Laboratories Ntt Corporation
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Muraguchi Masahiro
Ntt Photonics Laboratories
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Nosaka Hideyui
Ntt Photonics Laboratories Ntt Corporation
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Yamaguchi Yo
Ntt Network Innovation Laboratories Ntt Corporation
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YAMAGISHI Akihiro
NTT Microsystem Integration Laboratories, NTT Corporation
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Yamaguchi Yo
Ntt Network Innovation Laboratories
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Yamagishi Akihiro
Ntt Microsystem Integration Laboratories Ntt Corporation
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YAMAGISHI Akihiro
NTT Microsystem Integration Laboratories,NTT Corporation
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YAMAGUCHI Yo
NTT Network Innovation Laboratories,NTT Corporation
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