TWI456932B - 利用具有軟體控制交流響應之單一多工放大器通道來放大多重信號之方法與裝置 - Google Patents
利用具有軟體控制交流響應之單一多工放大器通道來放大多重信號之方法與裝置 Download PDFInfo
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
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- A61B5/00—Measuring for diagnostic purposes; Identification of persons
- A61B5/24—Detecting, measuring or recording bioelectric or biomagnetic signals of the body or parts thereof
- A61B5/30—Input circuits therefor
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Claims (23)
- 一種放大裝置,其包含:兩個或多個多工器,其中引線信號被輸入至該兩個或多個多工器;一個單一放大器通道,其中該兩個或多個多工器之輸出被輸入至該單一放大器通道;以及一個微控制器,其組構以控制該兩個或多個多工器,其中該微控制器儲存有軟體,該軟體係組構以每次一個依序地選擇出將被連接到該單一放大器通道之輸入的該等引線信號中之至少一個以及模擬一高通濾波器以移除一直流(DC)偏移量,藉由根據在一先前的放大週期中之引線信號來決定各該等引線信號之DC偏移量值,該DC偏移量將被施用至在該單一放大器通道中之引線信號,其中該單一放大器通道放大該等引線信號。
- 如申請專利範圍第1項之裝置,其中該單一放大器通道包含一差動放大器、一可程控增益放大器以及一抗膺頻濾波器(anti-aliasing filter)。
- 如申請專利範圍第2項之裝置,其中該微控制器包含一類比至數位轉換器以及一數位至類比轉換器。
- 如申請專利範圍第2項之裝置,其中:一個被選擇之引線信號被連接到該差動放大器之一輸入;該差動放大器之一輸出被饋送至該可程控增益放大器之一輸入,以便進行直流偏移量移除以及進一步的 放大;該可程控增益放大器之一輸出適於由該抗膺頻濾波器予以過濾;該抗膺頻濾波器之輸出適於利用一類比至數位轉換器而由該微控制器予以數位化;並且該微控制器能夠藉由利用該多工器而選擇將被放大的下一個引線信號。
- 如申請專利範圍第4項之裝置,其中該微控制器包含硬體或軟體,其適用於模擬一高通濾波器,以藉由計算來自該抗膺頻濾波器之數位化輸出之一電壓信號的直流偏移量、藉由該數位至類比轉換器將該直流偏移量轉換為一類比表示值、以及自下一個放大週期中之相同引線信號減回該直流偏移量,而移除該直流偏移量。
- 如申請專利範圍第5項之裝置,其中該軟體包含把供用於該引線信號之一低通濾波器的級模型化之指令碼。
- 如申請專利範圍第6項之裝置,其中該低通濾波器適於計算以及追蹤呈現在該抗膺頻濾波器之數位化輸出中的時變直流偏移量。
- 如申請專利範圍第6項之裝置,其進一步地包含適於使得該低通濾波器和該可程控增益放大器離開飽和狀態之一基線恢復演算法則。
- 如申請專利範圍第6項之裝置,其中該低通濾波器之頻率響應可藉由改變軟體中該濾波器之係數而調整為一期望數值,其中該放大器通道之交流(AC)頻率響應於該 軟體中可規劃。
- 如申請專利範圍第2項之裝置,其中該可程控增益放大器之一最大增益能夠受一數位至類比轉換器之解析度對一類比至數位轉換器之解析度的一比率所限制,以於移除該直流偏移量時防止信號失真。
- 如申請專利範圍第1項之裝置,其中該單一通道放大器之一交流響應能夠經由軟體加以控制以及改變。
- 如申請專利範圍第2項之裝置,其中該抗膺頻濾波器由該微控制器對於不同的頻率截止值予以組配,以匹配一所需的頻寬並且降低高頻雜訊。
- 一種放大多重信號之方法,其包含之步驟有:藉由跨越感測器之一組合進行差分電壓量測以導出多個引線信號;依序地選擇將被連接到一單一放大器通道之輸入的引線信號;在該等引線信號之間,以一週期序列,時間分割該單一放大器通道;對於被取樣之引線信號計算一直流漂移;在個別引線信號的下一個取樣中自個別的被取樣引線信號減去該直流漂移,其中該單一放大器通道放大該等引線信號。
- 如申請專利範圍第13項之方法,其中,在各個週期中,所有的引線信號依序地被選擇並且被切換,並且接著被更正直流偏移量、被放大以及被數位化。
- 如申請專利範圍第14項之方法,其中該週期連續地以每秒500個週期之速率被重複以供進行一診斷品質心電圖(ECG)。
- 如申請專利範圍第13項之方法,其中該單一通道放大器之一交流響應經由軟體或硬體予以控制及改變。
- 如申請專利範圍第13項之方法,其中對於各個被取樣之引線信號計算該直流漂移之步驟是經由軟體或硬體來實作。
- 一種放大裝置,其包含:兩個或多個多工器,其中引線信號適於被輸入至該兩個或多個多工器;至少一個放大器通道,其中該兩個或多個多工器之輸出能夠輸入至該至少一個放大器通道,並且其中該等放大器通道之數目少於引線信號之一數目;以及一微控制器,其適於控制該兩個或多個多工器,該微控制器包含硬體或軟體,該硬體或軟體係組構以模擬一高通濾波器,以藉由計算從各該等引線信號之直流偏移量以及在下一個放大週期中自對應引線信號減回該直流偏移量而移除該直流偏移量,其中該至少一個放大器通道能夠放大該等引線信號。
- 一種放大裝置,其包含:多個感測器,其中有多個引線信號自多個電極被導出;多個低通濾波器以及緩衝放大器,其能夠過濾且緩 衝該等多個引線信號;兩個或多個多工器,其中來自該等多個低通濾波器和緩衝放大器之輸出能夠輸入至該兩個或多個多工器;一個單一放大器通道,其中該兩個或多個多工器之該等輸出能夠輸入至該單一放大器通道;以及一個微控制器,其適於控制該兩個或多個多工器,其中該微控制器適於儲存軟體,該軟體係組構以每次一個依序地選擇出將被連接到該單一放大器通道之輸入的該等引線信號中之至少一個,在該等引線信號之間,以一週期序列,時間分割該單一放大器通道,以及根據在一先前的放大週期中之引線信號來決定各該等引線信號之一直流(DC)偏移量值,該DC偏移量將被施用至在該單一放大器通道中之引線信號,其中該單一放大器通道適於放大該等引線信號。
- 如申請專利範圍第19項之裝置,其中該微控制器適於在該等引線信號之間,以一週期序列,時間分割該單一放大器通道,以計算對於該等引線信號之一直流漂移。
- 如申請專利範圍第20項之裝置,其中該微控制器適於在該引線信號的下一個取樣中自一個個別的被取樣引線信號減去該直流漂移。
- 如申請專利範圍第21項之裝置,其中該週期能夠連續地以每秒500個週期之速率被重複以供進行一診斷品質心電圖(ECG)。
- 如申請專利範圍第19項之裝置,其中該裝置之交流響應 能夠藉由儲存於該微控制器中之一軟體程式予以控制。
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US (1) | US8200317B2 (zh) |
EP (1) | EP2034887A2 (zh) |
JP (1) | JP5068811B2 (zh) |
CN (1) | CN101453945B (zh) |
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WO (1) | WO2008005812A2 (zh) |
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Also Published As
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EP2034887A2 (en) | 2009-03-18 |
CN101453945A (zh) | 2009-06-10 |
JP2009537099A (ja) | 2009-10-22 |
TW200820659A (en) | 2008-05-01 |
US20080004536A1 (en) | 2008-01-03 |
CN101453945B (zh) | 2011-04-06 |
US8200317B2 (en) | 2012-06-12 |
WO2008005812A3 (en) | 2008-02-21 |
WO2008005812A2 (en) | 2008-01-10 |
JP5068811B2 (ja) | 2012-11-07 |
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