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JP2000283790A Expired / Lapsed JP ⏱️ 0.0 years remaining

Low frequency noise removal method and CMOS sensor circuit

Assignee: Denso Corp
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Filing: 1999-09-28
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Granted: —
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Expires: 2019-09-28
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Abstract

Abstract Translated from Japanese (57)【要約】 【課題】 内部ノイズが大きな素子を利用した回路構成 とする場合でも低周波ノイズの除去を効果的に行い得る ようにすること、CMOSセンサ回路において内部ノイ ズに起因した低周波ノイズによる悪影響を除去して検出 精度の向上を実現すること。 【解決手段】 検出対象信号sigより大きな値の意図 的オフセット値を予め設定し、その意図的オフセット値 の大きさを測定手段により測定した意図的オフセット測 定値aと、検出対象信号sigに意図的オフセット値を 加算した状態の信号の大きさを測定手段により測定した 信号測定値bとの比(b/a)を取り、その比をノイズ 低減データとして利用することによってセンサ出力のノ イズを低減させる。 [PROBLEMS] To effectively remove low-frequency noise even in a circuit configuration using an element having large internal noise, and to provide a low-frequency noise caused by internal noise in a CMOS sensor circuit. To improve detection accuracy by removing the adverse effects of noise. SOLUTION: An intentional offset value a, which is larger than a detection target signal sig, is set in advance, and the magnitude of the intentional offset value is measured by a measuring means, and an intentional offset measurement value a measured by a measuring means and an intentional offset value a The noise of the sensor output is reduced by taking the ratio (b / a) to the signal measured value b obtained by measuring the magnitude of the signal in the state where the offset value is added by the measuring means, and using the ratio as noise reduction data. .

Inventors

  • 👤 Takamoto Watanabe
  • 👤 高元 渡辺
  • 👤 Toshio Ikuta
  • 👤 敏雄 生田
  • 👤 Noboru Endo
  • 👤 昇 遠藤

Bibliographic Details

Application Number —
Jurisdiction JP
Data Source google_patents
Last Synchronized 2026-11-05 23:39
CPC Classifications
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