JP7267073B2 - ノイズ抑制回路 - Google Patents
ノイズ抑制回路 Download PDFInfo
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- JP7267073B2 JP7267073B2 JP2019072359A JP2019072359A JP7267073B2 JP 7267073 B2 JP7267073 B2 JP 7267073B2 JP 2019072359 A JP2019072359 A JP 2019072359A JP 2019072359 A JP2019072359 A JP 2019072359A JP 7267073 B2 JP7267073 B2 JP 7267073B2
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
- G06F3/04182—Filtering of noise external to the device and not generated by digitiser components
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F1/00—Details not covered by groups G06F3/00 - G06F13/00 and G06F21/00
- G06F1/16—Constructional details or arrangements
- G06F1/18—Packaging or power distribution
- G06F1/181—Enclosures
- G06F1/182—Enclosures with special features, e.g. for use in industrial environments; grounding or shielding against radio frequency interference [RFI] or electromagnetical interference [EMI]
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/0416—Control or interface arrangements specially adapted for digitisers
- G06F3/0418—Control or interface arrangements specially adapted for digitisers for error correction or compensation, e.g. based on parallax, calibration or alignment
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/044—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by capacitive means
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
- G06F3/045—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means using resistive elements, e.g. a single continuous surface or two parallel surfaces put in contact
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F2203/00—Indexing scheme relating to G06F3/00 - G06F3/048
- G06F2203/041—Indexing scheme relating to G06F3/041 - G06F3/045
- G06F2203/04104—Multi-touch detection in digitiser, i.e. details about the simultaneous detection of a plurality of touching locations, e.g. multiple fingers or pen and finger
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
- G06F3/033—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor
- G06F3/0354—Pointing devices displaced or positioned by the user, e.g. mice, trackballs, pens or joysticks; Accessories therefor with detection of 2D relative movements between the device, or an operating part thereof, and a plane or surface, e.g. 2D mice, trackballs, pens or pucks
- G06F3/03545—Pens or stylus
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- Engineering & Computer Science (AREA)
- Theoretical Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Human Computer Interaction (AREA)
- General Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Computer Hardware Design (AREA)
- Power Engineering (AREA)
- Electronic Switches (AREA)
- Position Input By Displaying (AREA)
- Switches That Are Operated By Magnetic Or Electric Fields (AREA)
Description
本出願は、35U.S.C.§119(e)下で、2018年4月5日に出願された米国仮特許出願第62/653,331号に対する優先権を主張する。米国仮特許出願第62/653,331号は、参照により全体が本明細書に組み込まれる。
205 センサ電極
207 ノイズ源
210 電荷積分器
220 電流コンベヤ
250 コントローラ
255 バッファ
260 加算抵抗器
295 フィードバック信号
298 フィードバックループ
299 増幅器
Claims (10)
- 増幅器であって、
複数の電荷積分器から複数の低減ノイズ信号を受信する複数の入力抵抗器と、
前記増幅器の出力にある加算抵抗器と、
を有し、複数の低減ノイズ信号のそれぞれを、利得値と前記複数の低減ノイズ信号の濃度とを使用して増幅することによって、前記増幅器の前記出力において、フィードバック信号を生成するように構成された増幅器と、
前記複数の電荷積分器であって、
ノイズ源に結合された複数の静電容量センサ電極から複数の結果信号を取得し、
前記フィードバック信号を使用して前記複数の結果信号内のノイズを軽減することによって、前記複数の電荷積分器において、前記複数の低減ノイズ信号を生成するように構成された複数の電荷積分器と、
を有し、前記複数の入力抵抗器の抵抗と、前記加算抵抗器の抵抗と、前記利得値と、が前記ノイズを軽減するように選択される処理システム。 - 前記複数の入力抵抗器がそれぞれRの抵抗を有し、
前記利得値がAであり、
前記複数の低減ノイズ信号の前記濃度がNであり、
前記加算抵抗器がA×R×(1/N)の抵抗を有し、
前記増幅器が、前記複数の低減ノイズ信号のそれぞれを-A/N倍に増幅する、請求項1に記載の処理システム。 - 前記複数の低減ノイズ信号のうちの少なくとも1つに基づいて、入力オブジェクトが前記複数の静電容量センサ電極の1つ以上の近くにあると決定するように構成されたコントローラを更に有する、請求項1に記載の処理システム。
- 前記ノイズ源が、前記コントローラによっても操作される表示装置と関連付けられた、請求項3に記載の処理システム。
- 前記増幅器が、
前記複数の入力抵抗器と前記加算抵抗器の間の複数の電流コンベヤを更に有する、請求項1に記載の処理システム。 - 前記複数の電流コンベヤがそれぞれ、
演算増幅器と、
前記演算増幅器の出力に結合された複数の電流ミラーと、
前記演算増幅器の入力に結合された安定化インピーダンスと、を有する、請求項5に記載の処理システム。 - 前記増幅器が、更に、
前記加算抵抗器に結合され、変調電圧を記憶するように構成されたバッファを有する、請求項1に記載の処理システム。 - 前記複数の静電容量センサ電極がそれぞれ、第1のインピーダンスによって前記ノイズ源に結合され、
前記複数の電荷積分器がそれぞれ、第2のインピーダンスに並列に演算増幅器を含み、
前記フィードバック信号が、前記複数の電荷積分器のそれぞれの非反転入力に結合された、請求項1に記載の処理システム。 - 増幅器によって、複数の低減ノイズ信号のそれぞれを利得値と前記複数の低減ノイズ信号の濃度とに基づいて増幅することによってフィードバック信号を生成するステップと、
ノイズ源に結合された複数の静電容量センサ電極から複数の結果信号を取得するステップと、
複数の電荷積分器によって、前記フィードバック信号を使用して前記複数の結果信号内のノイズを軽減することによって前記複数の低減ノイズ信号を生成するステップと、を含み、
前記増幅器が、
前記複数の電荷積分器から前記複数の低減ノイズ信号を受信する複数の入力抵抗器と、
前記増幅器の出力にある加算抵抗器と、
を有し、
前記複数の入力抵抗器の抵抗と、前記加算抵抗器の抵抗と、前記利得値と、が前記ノイズを軽減するように選択される方法。 - ノイズ源に結合された複数の静電容量センサ電極と、
増幅器であって、
複数の電荷積分器から複数の低減ノイズ信号を受信する複数の入力抵抗器と、
前記増幅器の出力にある加算抵抗器と、
を有し、複数の低減ノイズ信号のそれぞれを、利得値と前記複数の低減ノイズ信号の濃度とを使用して増幅することによって、前記増幅器の前記出力において、フィードバック信号を生成するように構成された増幅器と、
複数の電荷積分器であって、
ノイズ源に結合された複数の静電容量センサ電極から複数の結果信号を取得し、
前記フィードバック信号を使用して前記複数の結果信号内のノイズを軽減することによって、前記複数の電荷積分器において、前記複数の低減ノイズ信号を生成するように構成された前記複数の電荷積分器と、
前記複数の低減ノイズ信号のうちの少なくとも1つに基づいて、入力オブジェクトが前記複数の静電容量センサ電極の少なくとも1つの近くにあると決定するように構成されたコントローラと、
を有し、
前記複数の入力抵抗器の抵抗と、前記加算抵抗器の抵抗と、前記利得値と、が前記ノイズを軽減するように選択される入力装置。
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US201862653331P | 2018-04-05 | 2018-04-05 | |
US62/653,331 | 2018-04-05 | ||
US16/373,369 | 2019-04-02 | ||
US16/373,369 US11054942B2 (en) | 2018-04-05 | 2019-04-02 | Noise suppression circuit |
Publications (3)
Publication Number | Publication Date |
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JP2019207682A JP2019207682A (ja) | 2019-12-05 |
JP2019207682A5 JP2019207682A5 (ja) | 2022-03-30 |
JP7267073B2 true JP7267073B2 (ja) | 2023-05-01 |
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Application Number | Title | Priority Date | Filing Date |
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JP2019072359A Active JP7267073B2 (ja) | 2018-04-05 | 2019-04-04 | ノイズ抑制回路 |
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US (2) | US11054942B2 (ja) |
JP (1) | JP7267073B2 (ja) |
KR (1) | KR20190116940A (ja) |
CN (1) | CN110347282A (ja) |
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US11106317B1 (en) * | 2020-04-14 | 2021-08-31 | Synaptics Incorporated | Common mode noise suppression with restoration of common mode signal |
KR102348144B1 (ko) * | 2020-12-11 | 2022-01-07 | 주식회사 지니틱스 | 전류 컨베이어를 이용한 터치입력 감지장치 |
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2019
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- 2019-04-04 KR KR1020190039711A patent/KR20190116940A/ko not_active Application Discontinuation
- 2019-04-04 CN CN201910272120.XA patent/CN110347282A/zh active Pending
- 2019-04-04 JP JP2019072359A patent/JP7267073B2/ja active Active
-
2021
- 2021-06-07 US US17/341,124 patent/US11460953B2/en active Active
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JP2014045475A (ja) | 2012-08-01 | 2014-03-13 | Alps Electric Co Ltd | 静電容量検出回路及び入力デバイス |
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Also Published As
Publication number | Publication date |
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CN110347282A (zh) | 2019-10-18 |
US20190310739A1 (en) | 2019-10-10 |
US11460953B2 (en) | 2022-10-04 |
JP2019207682A (ja) | 2019-12-05 |
KR20190116940A (ko) | 2019-10-15 |
US20210294454A1 (en) | 2021-09-23 |
US11054942B2 (en) | 2021-07-06 |
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