Input-Feedforward Two-Path Band-Pass Delta-Sigma Modulator Based on Horizontal or Vertical Opamp Sharing Technique
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概要
- 論文の詳細を見る
In this paper, horizontal (where an opamp is shared in two adjacent stages) and vertical (where an opamp is shared across two paths) opamp sharing techniques for a two-path band-pass (BP) ΔΣ modulator are described, and input-feedforward two-path fourth-order BP ΔΣ modulators that have only two opamps are proposed. The proposed modulators are based on the horizontal or vertical opamp sharing technique. They can be realized with both a summation circuit using a switched capacitor (SC) network and a second-order high-pass filter (HPF) with a horizontal shared opamp or a double-sampling first-order HPF with a vertical shared opamp, which are based on an SC first-order HPF with an opamp. These techniques can reduce the number of opamps with no additional component and the chip area as well as realize lower power consumption.
- （社）電子情報通信学会の論文
- 2008-02-01
著者
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SEKINE Keitaro
Faculty of Science and Technology, Tokyo University of Science
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Hyogo Akira
Tokyo University Of Science
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Sekine Keitaro
Tokyo University Of Science
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Sekine Keitaro
Faculty Of Science And Technology Tokyo University Of Science
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SATO Hiroki
Tokyo University of Science
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WAKI Naoya
Tokyo University of Science
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Sato Hiroki
Graduate School Of Science And Engineering Department Of Communications And Integrated Systems Tokyo
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Sato Hiroki
Tokyo Institute Of Technology
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