JP4252511B2 - 半導体装置 - Google Patents
半導体装置 Download PDFInfo
- Publication number
- JP4252511B2 JP4252511B2 JP2004223351A JP2004223351A JP4252511B2 JP 4252511 B2 JP4252511 B2 JP 4252511B2 JP 2004223351 A JP2004223351 A JP 2004223351A JP 2004223351 A JP2004223351 A JP 2004223351A JP 4252511 B2 JP4252511 B2 JP 4252511B2
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- semiconductor device
- noise
- input
- terminal
- impedance element
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- Junction Field-Effect Transistors (AREA)
- Insulated Gate Type Field-Effect Transistor (AREA)
- Semiconductor Integrated Circuits (AREA)
- Metal-Oxide And Bipolar Metal-Oxide Semiconductor Integrated Circuits (AREA)
Description
ここで、CissはMOSFET13の入力容量、RgsはAPD14の等価抵抗、gmはMOSFET13のトランスコンダクタンス、kBはボルツマン乗数、Tは半導体装置の絶対温度である。また、CoxはMOSFET13の単位体積あたりのゲート酸化膜の容量、AfとKfはMOSFET13のノイズパラメータである。
4:抵抗、5:保護素子、11:JFET、12:抵抗、13:MOSFET、
14:APD、15:カプセル容量、16:ドレイン抵抗、
101:入力端子、102:GND、103:出力端子、104:VDD
Claims (2)
- 入力トランジスタのゲート端子若しくはベース端子をコンデンサマイクロフォンのカプセルの入力端子とし、ソース端子若しくはエミッタ端子と前記入力端子との間に、インピーダンス素子を接続することで入力インピーダンスをコントロールする半導体装置において、
前記インピーダンス素子は、正の温度係数を有するインピーダンス素子と負の温度係数を有するインピーダンス素子とを直列に接続し、温度変化に伴う前記入力インピーダンスの変化を緩和することを特徴とした半導体装置。 - 請求項1記載の半導体装置において、前記正の温度係数を有するインピーダンス素子が、抵抗素子からなり、前記負の温度係数を有するインピーダンス素子が、アンチパラレルダイオードからなることを特徴とする半導体装置。
Priority Applications (1)
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JP2004223351A JP4252511B2 (ja) | 2004-07-30 | 2004-07-30 | 半導体装置 |
Applications Claiming Priority (1)
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JP2004223351A JP4252511B2 (ja) | 2004-07-30 | 2004-07-30 | 半導体装置 |
Publications (2)
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JP2006041441A JP2006041441A (ja) | 2006-02-09 |
JP4252511B2 true JP4252511B2 (ja) | 2009-04-08 |
Family
ID=35906072
Family Applications (1)
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JP2004223351A Active JP4252511B2 (ja) | 2004-07-30 | 2004-07-30 | 半導体装置 |
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JP (1) | JP4252511B2 (ja) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5901889B2 (ja) * | 2011-04-26 | 2016-04-13 | シャープ株式会社 | 光センサおよびそれを備えた携帯電話ならびにデジタルカメラ |
JP6686259B2 (ja) * | 2015-11-24 | 2020-04-22 | 新日本無線株式会社 | マイクロホン増幅装置 |
JP7191598B2 (ja) * | 2018-09-06 | 2022-12-19 | 日清紡マイクロデバイス株式会社 | 増幅装置 |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5353681A (en) * | 1976-10-27 | 1978-05-16 | Yoshitomi Pharmaceut Ind Ltd | Preparation of debenzazepin derivatives |
JPH0774677B2 (ja) * | 1985-01-07 | 1995-08-09 | 克紀 棚田 | 旋回式建設機械用スイベルジョイント |
JPH03228364A (ja) * | 1990-02-02 | 1991-10-09 | Sumitomo Electric Ind Ltd | 半導体抵抗回路 |
JPH05210986A (ja) * | 1991-10-29 | 1993-08-20 | Sony Corp | 抵抗体 |
JP3805543B2 (ja) * | 1998-11-19 | 2006-08-02 | 三菱電機株式会社 | 半導体集積回路 |
JP2003243944A (ja) * | 2002-02-15 | 2003-08-29 | Sanyo Electric Co Ltd | 高入力インピーダンス増幅器及びエレクトレットコンデンサマイクロフォン用の半導体集積回路。 |
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2004
- 2004-07-30 JP JP2004223351A patent/JP4252511B2/ja active Active
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