WO2010150657A1 - 積分回路および光検出装置 - Google Patents
積分回路および光検出装置 Download PDFInfo
- Publication number
- WO2010150657A1 WO2010150657A1 PCT/JP2010/059826 JP2010059826W WO2010150657A1 WO 2010150657 A1 WO2010150657 A1 WO 2010150657A1 JP 2010059826 W JP2010059826 W JP 2010059826W WO 2010150657 A1 WO2010150657 A1 WO 2010150657A1
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- WO
- WIPO (PCT)
- Prior art keywords
- switch
- input terminal
- terminal
- amplifier circuit
- circuit
- Prior art date
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 12
- 230000010354 integration Effects 0.000 claims description 18
- 230000003287 optical effect Effects 0.000 claims description 2
- 239000003990 capacitor Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 4
- 238000004088 simulation Methods 0.000 description 2
- 230000003321 amplification Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01J—MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY
- G01J1/00—Photometry, e.g. photographic exposure meter
- G01J1/42—Photometry, e.g. photographic exposure meter using electric radiation detectors
- G01J1/44—Electric circuits
- G01J1/46—Electric circuits using a capacitor
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/005—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements using switched capacitors, e.g. dynamic amplifiers; using switched capacitors as resistors in differential amplifiers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/04—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only
- H03F3/08—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements with semiconductor devices only controlled by light
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03F—AMPLIFIERS
- H03F3/00—Amplifiers with only discharge tubes or only semiconductor devices as amplifying elements
- H03F3/45—Differential amplifiers
Definitions
- the present invention relates to an integration circuit that accumulates input charges and outputs a voltage value corresponding to the amount of accumulated charges, and a photodetector that includes the integration circuit and a photodiode.
- the integrating circuit includes an amplifier circuit having a first input terminal, a second input terminal, and an output terminal, and a capacitive element provided between the first input terminal and the output terminal of the amplifier circuit and connected in parallel to each other. And a switch.
- the switch of the integration circuit when the switch of the integration circuit is closed, the capacitive element of the integration circuit is discharged, and the voltage value output from the integration circuit is initialized.
- the switch of the integration circuit is open, the charge generated by the photodiode is stored in the capacitor element of the integration circuit, and a voltage value corresponding to the amount of stored charge is output from the integration circuit.
- the light detection device can acquire a one-dimensional or two-dimensional light image by arranging a plurality of photodiodes in a one-dimensional or two-dimensional arrangement.
- the photodetection device is required to increase the number of photodiodes arranged, and accordingly, speeding up and low power consumption are also required.
- the power consumption of the integration circuit included in the photodetector is reduced, the drive capability of the amplifier circuit is reduced, so that the output voltage value of the integration circuit is initialized by closing the switch of the integration circuit. It takes longer time. That is, conventionally, it has been difficult to achieve both low power consumption and high speed.
- the present invention has been made to solve the above problems, and an object of the present invention is to provide an integration circuit and a photodetection device that can achieve both low power consumption and high speed.
- An integrating circuit includes (1) an amplifier circuit having a first input terminal, a second input terminal, and an output terminal, and (2) a capacitor provided between the first input terminal and the output terminal of the amplifier circuit. An element; (3) a first switch provided in parallel with the capacitor between the first input terminal and the output terminal of the amplifier circuit; and (4) a reference potential input terminal to which a reference potential is input. And a second switch that is provided between the capacitor element on the first input terminal side of the amplifier circuit and applies a reference potential to the terminal of the capacitor element.
- One of the first input terminal and the second input terminal of the amplifier circuit is an inverting input terminal, and the other is a non-inverting input terminal.
- the photodetector according to the present invention includes (1) the integration circuit according to the present invention described above, and (2) an amount of electric charge corresponding to the amount of incident light, and the generated electric charge is the first of the amplification circuit of the integration circuit. And a photodiode input to the input terminal.
- the second switch when the first switch is closed in the integrating circuit and the capacitive element is discharged and the output voltage value of the integrating circuit is initialized, the second switch is also closed and the reference potential is applied to the terminal of the capacitive element. .
- the capacitive element of the integrating circuit is quickly discharged.
- FIG. 1 is a diagram illustrating a configuration of a light detection device 1 according to the present embodiment.
- FIG. 2 is a diagram for explaining the operation of the photodetecting device 1 according to the present embodiment.
- FIG. 3 is a diagram for explaining the operation of the photodetecting device 1 according to the present embodiment.
- FIG. 1 is a diagram illustrating a configuration of a light detection device 1 according to the present embodiment.
- the photodetector 1 shown in this figure includes a photodiode PD and an integration circuit 10.
- Integrating circuit 10 includes an amplifier circuit 20, a capacitor C, a first switch SW 1 and the second switch SW 2.
- the amplifier circuit 20 has an inverting input terminal, a non-inverting input terminal, and an output terminal.
- the capacitive element C is provided between the inverting input terminal and the output terminal of the amplifier circuit 20.
- the first switch SW 1 is not provided in parallel with the capacitor C between the inverting input terminal of the amplifier circuit 20 and the output terminal, opens and closes based on the level of the first reset signal Reset1.
- the non-inverting input terminal of the amplifier circuit 20 is connected to the ground potential.
- the non-inverting input terminal of the amplifier circuit 20 is not limited to the ground potential as long as it is a fixed potential, and may be 0.1 V, for example.
- the second switch SW 2 is provided between the inverting input terminal side terminal of the capacitor C of the reference voltage input terminal and the amplifier circuit 20 to the reference potential Vref is input in accordance with the level of the second reset signal Reset2
- the reference potential Vref can be applied to the terminal of the capacitor C by opening and closing.
- This reference potential Vref may be a ground potential.
- the photodiode PD has a cathode terminal and an anode terminal, and generates an amount of charge corresponding to the amount of incident light.
- the cathode terminal of the photodiode PD is connected to the inverting input terminal of the amplifier circuit 20.
- the anode terminal of the photodiode PD is connected to the ground potential.
- the light detection apparatus 1 includes a control unit 50 that controls the opening / closing operation of each of the first switch SW 1 and the second switch SW 2, and operates as follows by the control by the control unit. .
- FIG. 2 is a diagram for explaining the operation of the photodetecting device 1 according to the present embodiment. In this figure, the open / close state of the first switch SW 1 , the open / close state of the second switch SW 2 , and the output voltage value Vout of the light detection device 1 are shown in order from the top.
- the first switch SW 1 Before the time t 1, the first switch SW 1 is closed, the capacitor C is discharged, the output voltage value Vout of the photodetecting device 1 is the initial value. In addition, the previous time t 1, the second switch SW 2 is open. At the time t 1, the first switch SW 1 is turn from a closed state to an open state.
- the first switch SW 1 and the second switch SW 2 are open during the period from time t 1 to time t 2 .
- the integrating circuit 10 inputs the charge generated in the photodiode PD to the inverting input terminal, accumulates the input charge in the capacitor element C, and outputs a voltage value Vout corresponding to the accumulated charge amount. Therefore, the output voltage value Vout of the photodetecting device 1 gradually increases as time passes.
- the first switch SW 1 and the second switch SW 2 respectively switches from the open state to the closed state.
- the capacitor C is gradually discharged, the output voltage value Vout of the photodetecting device 1 is set to the initial value.
- the second switch SW 2 is turned to an open state.
- the time the output voltage value Vout at time t 2 after the light detecting device is required to reach the initial value was about 3.8Myuesu.
- the time required for the output voltage value Vout of the photodetector 1 after time t 2 to reach the initial value is longer than that in the comparative example. It was short.
- the first switch SW 1 to the time t 2 is by turn to the second even closed switch SW 2 with turns to a closed state, the time required until the output voltage value Vout reaches the initial value Can be shortened, and high speed can be achieved.
- the reason why the initialization is fast in the present embodiment is as follows. That is, the time when the first switch SW 1 to t 2 is turned to the second even closed switch SW 2 with turns to a closed state, the time t 2 before the electric charge accumulated in the capacitor C until the second switch SW 2 Therefore, the capacitive element C is discharged quickly. In general it When attempt is made to reduce power consumption speed is difficult, in the present embodiment, by providing the second switch SW 2, it is possible to both low-power and high speed.
- FIG. 3 is a diagram for explaining the operation of the photodetecting device 1 according to the present embodiment.
- the result of a simulation is shown in which the length ⁇ of the period in which the second switch SW 2 is in the closed state (period from time t 2 to time t 3 in FIG. 2) is used as each value.
- the time ⁇ so that the output voltage value Vout reaches a value close to the initial value during the time ⁇ , the time required for initialization is shortened by about 2.5 ⁇ s compared to the comparative example. I can see that
- the present invention can be used as an integration circuit and a light detection device capable of reducing both power consumption and speed.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
- Amplifiers (AREA)
- Transforming Light Signals Into Electric Signals (AREA)
- Solid State Image Pick-Up Elements (AREA)
- Electronic Switches (AREA)
Abstract
Description
Claims (2)
- 第1入力端子,第2入力端子および出力端子を有する増幅回路と、
前記増幅回路の前記第1入力端子と前記出力端子との間に設けられた容量素子と、
前記増幅回路の前記第1入力端子と前記出力端子との間に前記容量素子に対して並列的に設けられた第1スイッチと、
基準電位が入力される基準電位入力端子と前記増幅回路の前記第1入力端子側の前記容量素子の端子との間に設けられ、前記容量素子の端子に前記基準電位を印加する第2スイッチと、
を備えることを特徴とする積分回路。 - 請求項1に記載の積分回路と、
入射光量に応じた量の電荷を発生し、その発生した電荷を前記積分回路の前記増幅回路の前記第1入力端子に入力させるフォトダイオードと、
を備えることを特徴とする光検出装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201080027820.XA CN102460961B (zh) | 2009-06-22 | 2010-06-10 | 光检测装置 |
EP10791975.5A EP2448113A4 (en) | 2009-06-22 | 2010-06-10 | INTEGRATED CIRCUIT AND LIGHT DETECTION DEVICE |
KR1020117022669A KR101715960B1 (ko) | 2009-06-22 | 2010-06-10 | 적분 회로 및 광 검출 장치 |
US13/379,103 US8890051B2 (en) | 2009-06-22 | 2010-06-10 | Integrating circuit and light-detection device |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2009147637A JP2011004327A (ja) | 2009-06-22 | 2009-06-22 | 積分回路および光検出装置 |
JP2009-147637 | 2009-06-22 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2010150657A1 true WO2010150657A1 (ja) | 2010-12-29 |
Family
ID=43386429
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2010/059826 WO2010150657A1 (ja) | 2009-06-22 | 2010-06-10 | 積分回路および光検出装置 |
Country Status (7)
Country | Link |
---|---|
US (1) | US8890051B2 (ja) |
EP (1) | EP2448113A4 (ja) |
JP (1) | JP2011004327A (ja) |
KR (1) | KR101715960B1 (ja) |
CN (1) | CN102460961B (ja) |
TW (1) | TWI490458B (ja) |
WO (1) | WO2010150657A1 (ja) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10375475B2 (en) | 2013-04-09 | 2019-08-06 | Cirrus Logic, Inc. | Systems and methods for compressing a digital signal in a digital microphone system |
US9626981B2 (en) | 2014-06-25 | 2017-04-18 | Cirrus Logic, Inc. | Systems and methods for compressing a digital signal |
JP6494196B2 (ja) * | 2014-07-09 | 2019-04-03 | オリンパス株式会社 | サンプリング回路 |
CN104865563B (zh) * | 2015-06-05 | 2017-10-03 | 杭州士兰微电子股份有限公司 | 积分电路及接近检测芯片 |
CN109541706B (zh) * | 2018-12-19 | 2020-11-10 | 地太科特电子制造(北京)有限公司 | 一种检测电路及射线探测器 |
US11754444B2 (en) * | 2021-03-19 | 2023-09-12 | Rockwell Collins, Inc. | Distributed integrate and dump circuit |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06105067A (ja) | 1992-09-18 | 1994-04-15 | Hamamatsu Photonics Kk | 画像読取装置 |
JP2006505975A (ja) * | 2002-11-07 | 2006-02-16 | キセニクス・ナムローゼ・フェンノートシャップ | 赤外検出器用読出し回路 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3449741A (en) * | 1965-02-08 | 1969-06-10 | Towson Lab Inc | Reversible analog-digital converter utilizing incremental discharge of series connected charge sharing capacitors |
US4786831A (en) * | 1984-12-17 | 1988-11-22 | Hughes Aircraft Company | Integrating capacitively coupled transimpedance amplifier |
JP4424796B2 (ja) | 1999-11-18 | 2010-03-03 | 浜松ホトニクス株式会社 | 光検出装置 |
JP2005244506A (ja) * | 2004-02-25 | 2005-09-08 | Hamamatsu Photonics Kk | 増幅回路、積分回路および光検出装置 |
JP4762651B2 (ja) | 2005-09-12 | 2011-08-31 | 浜松ホトニクス株式会社 | 液晶バックライト用調光回路 |
JP4325638B2 (ja) | 2006-04-26 | 2009-09-02 | オムロンヘルスケア株式会社 | 脈波測定装置 |
JP4929060B2 (ja) * | 2006-07-14 | 2012-05-09 | ローム株式会社 | アナログ/ディジタル変換器、照度センサ、照明装置、電子機器 |
JP5296612B2 (ja) * | 2009-06-22 | 2013-09-25 | 浜松ホトニクス株式会社 | 積分回路および光検出装置 |
-
2009
- 2009-06-22 JP JP2009147637A patent/JP2011004327A/ja active Pending
-
2010
- 2010-06-10 WO PCT/JP2010/059826 patent/WO2010150657A1/ja active Application Filing
- 2010-06-10 KR KR1020117022669A patent/KR101715960B1/ko active IP Right Grant
- 2010-06-10 CN CN201080027820.XA patent/CN102460961B/zh active Active
- 2010-06-10 EP EP10791975.5A patent/EP2448113A4/en not_active Withdrawn
- 2010-06-10 US US13/379,103 patent/US8890051B2/en active Active
- 2010-06-17 TW TW099119748A patent/TWI490458B/zh active
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH06105067A (ja) | 1992-09-18 | 1994-04-15 | Hamamatsu Photonics Kk | 画像読取装置 |
JP2006505975A (ja) * | 2002-11-07 | 2006-02-16 | キセニクス・ナムローゼ・フェンノートシャップ | 赤外検出器用読出し回路 |
Non-Patent Citations (1)
Title |
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See also references of EP2448113A4 * |
Also Published As
Publication number | Publication date |
---|---|
KR101715960B1 (ko) | 2017-03-13 |
CN102460961A (zh) | 2012-05-16 |
US20120127460A1 (en) | 2012-05-24 |
EP2448113A4 (en) | 2014-12-24 |
TW201109634A (en) | 2011-03-16 |
JP2011004327A (ja) | 2011-01-06 |
TWI490458B (zh) | 2015-07-01 |
US8890051B2 (en) | 2014-11-18 |
CN102460961B (zh) | 2016-07-06 |
KR20120036797A (ko) | 2012-04-18 |
EP2448113A1 (en) | 2012-05-02 |
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