WO2016140382A1 - 멀티 애퍼처 카메라의 센서 어레이에 포함되는 노이즈 저감 유닛 및 그 동작 방법 - Google Patents
멀티 애퍼처 카메라의 센서 어레이에 포함되는 노이즈 저감 유닛 및 그 동작 방법 Download PDFInfo
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- WO2016140382A1 WO2016140382A1 PCT/KR2015/002087 KR2015002087W WO2016140382A1 WO 2016140382 A1 WO2016140382 A1 WO 2016140382A1 KR 2015002087 W KR2015002087 W KR 2015002087W WO 2016140382 A1 WO2016140382 A1 WO 2016140382A1
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- pga
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- noise reduction
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
- H04N25/65—Noise processing, e.g. detecting, correcting, reducing or removing noise applied to reset noise, e.g. KTC noise related to CMOS structures by techniques other than CDS
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
- H04N23/80—Camera processing pipelines; Components thereof
- H04N23/81—Camera processing pipelines; Components thereof for suppressing or minimising disturbance in the image signal generation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/60—Noise processing, e.g. detecting, correcting, reducing or removing noise
- H04N25/616—Noise processing, e.g. detecting, correcting, reducing or removing noise involving a correlated sampling function, e.g. correlated double sampling [CDS] or triple sampling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
- H04N25/00—Circuitry of solid-state image sensors [SSIS]; Control thereof
- H04N25/70—SSIS architectures; Circuits associated therewith
- H04N25/71—Charge-coupled device [CCD] sensors; Charge-transfer registers specially adapted for CCD sensors
- H04N25/75—Circuitry for providing, modifying or processing image signals from the pixel array
Definitions
- the present invention relates to a unit for reducing noise included in a sensor array of a multi aperture camera, and more particularly, to a signal processed in at least one pixel included in a sensor array.
- the multi-patcher camera includes a plurality of apertures to process a plurality of apertures (for example, an aperture for inputting an RGB signal and a cut-off filter for introducing an IR signal) in a plurality of sensor arrays. Acquire images of.
- the sensor array of the multi-aperture camera includes red-green-blue (RGB) pixels and IR pixels, so that the blurred image to extract distance information is obtained from the RGB pixels, and the reference is The sharp image is obtained from the IR pixel.
- RGB red-green-blue
- the IR pixel uses the IR signal flowing through the small aperture of the cut-off filter included in the multi-aperture camera as the optical input, the IR pixel is applied to the RGB pixels inputting the optical signal flowing through the large aperture. Compared with this, the input signal is reduced and the signal to noise ratio for the IR signal is small.
- the R pixel uses the R signal flowing through the small aperture of the cut-off filter as the light input, the light entering through the large aperture The input signal is reduced compared to the GB pixels for inputting the signal, which results in a small signal-to-noise ratio for the R signal.
- the present specification proposes a technique for improving the signal-to-noise ratio of a signal processed in at least one pixel by reducing noise from a signal processed in at least one pixel included in a sensor array.
- this technique can be used for high sensitivity sensors that improve the signal-to-noise ratio by reducing the noise of all outputs when applied to all signals of RGB and IR.
- Embodiments of the present invention provide a noise reduction unit and a method of operating the same, by reducing noise from a signal processed in at least one pixel included in a sensor array, thereby improving a signal-to-noise ratio of a signal processed in at least one pixel.
- embodiments of the present invention output a difference between the reset voltage and the signal voltage for at least one pixel as an analog signal for at least one pixel, thereby providing high sensitivity through noise reduction of the analog signal for at least one pixel. It provides a shoe unit and its operation method.
- embodiments of the present invention utilize an averaging effect by performing an oversampling operation of sampling the output signal of at least one PGA for at least one pixel a plurality of times, thereby providing a final output for at least one pixel.
- a noise reduction unit for reducing noise of a digital signal and a method of operating the same are provided.
- a noise reduction unit included in a sensor array of a multi aperture camera may include a reset voltage and at least one reset voltage for at least one pixel included in the sensor array.
- At least one programmable gain amplifier (PGA) for outputting a difference between signal voltages for a pixel and / or each value as an analog signal for the at least one pixel;
- at least one AD converter for converting the output analog signal for at least one pixel into a digital signal for the at least one pixel, and outputting the converted analog signal, wherein the at least one AD converter is the at least one.
- PGA programmable gain amplifier
- An oversampling operation for sampling the output signal of the at least one PGA for a pixel of a plurality of times and / or an averaging for calculating an average value for the output signal of the at least one PGA sampled a plurality of times Perform the action.
- the at least one PGA is a difference value between a reset voltage for the at least one pixel and a signal voltage for the at least one pixel and / or for reducing noise of an analog signal for the at least one pixel.
- the value may be output as an analog signal for the at least one pixel.
- the at least one AD converter When the at least one AD converter outputs a value of each of a reset voltage for the at least one pixel and a signal voltage for the at least one pixel in the at least one PGA as an analog signal for the at least one pixel,
- the digital signal of the reset voltage for the at least one pixel converted analog signal of the reset voltage for the at least one pixel and the at least one pixel for the analog signal of the signal voltage for the at least one pixel is converted
- the difference value between the digital signals of the signal voltage can be output.
- the at least one AD converter may perform the oversampling operation and / or the averaging operation to reduce noise of the digital signal for the at least one pixel.
- the at least one PGA is a single circuit which commonly performs an operation of outputting a reset voltage for the at least one pixel and an operation of outputting a signal voltage for the at least one pixel according to a switching operation of a plurality of switching elements. It can be formed as.
- the at least one PGA may amplify and output a signal voltage for the at least one pixel by controlling a capacitor value.
- the at least one PGA and the at least one AD converter may be arranged for each column of at least one pixel included in the sensor array.
- a method of operating a noise reduction unit included in a sensor array of a multi aperture camera may be included in the sensor array in at least one programmable gain amplifier (PGA). Outputting a difference between the reset voltage for at least one pixel and the signal voltage for the at least one pixel and / or each value as an analog signal for the at least one pixel; And converting an analog signal for the at least one pixel output from the at least one AD converter into a digital signal for the at least one pixel and outputting the converted analog signal to the at least one pixel.
- PGA programmable gain amplifier
- the difference between the reset voltage for the at least one pixel and the signal voltage for the at least one pixel and / or each value is converted into an analog signal for the at least one pixel. It may be a step of outputting.
- the performing of the oversampling operation and / or the averaging operation may include performing the oversampling operation and / or the averaging operation to reduce noise of the digital signal for the at least one pixel. Can be.
- the at least one PGA is a single circuit which commonly performs an operation of outputting a reset voltage for the at least one pixel and an operation of outputting a signal voltage for the at least one pixel according to a switching operation of a plurality of switching elements. It can be formed as.
- the method may further include amplifying and outputting a signal voltage for the at least one pixel by controlling a capacitor value included therein.
- the at least one PGA and the at least one AD converter may be arranged for each column of at least one pixel included in the sensor array.
- Embodiments of the present invention can provide a noise reduction unit and a method of operating the same to reduce the signal-to-noise ratio of the signal processed in at least one pixel by reducing noise from the signal processed in at least one pixel included in the sensor array. have.
- embodiments of the present invention output a difference between the reset voltage and the signal voltage for at least one pixel as an analog signal for at least one pixel, thereby providing high sensitivity through noise reduction of the analog signal for at least one pixel.
- the shoe unit and its operation method can be provided.
- embodiments of the present invention utilize an averaging effect by performing an oversampling operation of sampling the output signal of at least one PGA for at least one pixel a plurality of times, thereby providing a final output for at least one pixel.
- the noise reduction unit which reduces the noise of a digital signal, and its operation method can be provided.
- FIG. 1 is a conceptual diagram illustrating a sensor array according to an embodiment of the present invention.
- FIG. 2 is a conceptual diagram illustrating a noise reduction unit according to an embodiment of the present invention.
- FIG. 3 is a circuit diagram illustrating at least one PGA according to an embodiment of the present invention.
- FIG. 4 is a flowchart illustrating a method of operating a noise reduction unit according to an exemplary embodiment of the present invention.
- FIG. 1 is a conceptual diagram illustrating a sensor array according to an embodiment of the present invention.
- a sensor array may include at least one pixel 110 for processing an incoming optical signal, and at least one column arranged for each column of the at least one pixel 110.
- At least one pixel 110 is formed in plural to form an array 111.
- the pixels configured of the array 111 may be selected and read in rows.
- pixels located in the same furnace among a plurality of pixels included in the array 111 may be operated at the same time. More specifically, for example, when the first furnace 112 is operated, at least one pixel 110 and pixels 113 disposed in the same first furnace 112 as the at least one pixel 110 are simultaneously selected.
- the pixel output converted into an electric signal according to the incoming optical signal can be read after signal processing through a noise reduction circuit arranged in a column.
- the at least one PGA 120 is connected to the at least one pixel 110 to output an analog signal for at least one pixel 110 corresponding to the electrical signal output from the at least one pixel 110.
- the at least one PGA 120 may determine a difference value between the reset voltage for the at least one pixel 110 and the signal voltage for the at least one pixel 110 and / or each value of the at least one pixel ( By outputting as an analog signal for 110, noise of the analog signal for at least one pixel 110 can be reduced. Detailed description thereof will be described with reference to FIG. 2.
- the at least one AD converter 130 is connected to the at least one PGA 120 to transmit an analog signal for at least one pixel 110 output from the at least one PGA 120 to the at least one pixel 110.
- the digital signal is converted into a digital signal.
- the at least one AD converter 130 samples an oversampling operation for sampling the output signal of the at least one PGA 120 for the at least one pixel 110 a plurality of times and / or at least a plurality of times the sampled number of times.
- noise of the digital signal which is the final output of the at least one pixel 110, may be reduced.
- a delta-sigma AD converter may be used as the at least one AD converter 130. Detailed description thereof will be described with reference to FIG. 2.
- the sensor array according to the embodiment of the present invention uses at least one PGA 120 to improve the signal-to-noise ratio of the signal processed in the at least one pixel 110.
- Noise of the analog signal may be reduced, and noise of the digital signal for the at least one pixel 110 may be reduced by using the at least one AD converter 130.
- the sensor array according to an embodiment of the present invention applies a technique for reducing the noise of the digital signal for at least one pixel 110 to all the pixels, thereby reducing the noise of all the outputs and improving the signal-to-noise ratio. It can be used as a high sensitivity sensor.
- FIG. 2 is a conceptual diagram illustrating a noise reduction unit according to an embodiment of the present invention.
- the noise reduction unit 210 includes at least one PGA 211 and at least one AD converter 212.
- the noise reduction unit 210 may be connected to the output terminal of the source follower 220 of at least one pixel.
- At least one PGA 211 is connected with the source follower 220 of at least one pixel, so as to reduce noise of the analog signal for the at least one pixel, the reset voltage for the at least one pixel and the at least one pixel. Outputs the difference between the signal voltages for and / or each value as an analog signal for at least one pixel.
- the at least one PGA 211 commonly performs an operation of outputting a reset voltage for at least one pixel and an operation of outputting a signal voltage for at least one pixel according to switching operations of the plurality of switching elements. It can be formed in a single circuit.
- the at least one PGA 211 may amplify and output a signal voltage for at least one pixel by controlling the capacitor value. Accordingly, the at least one PGA 211 may not only output an analog signal for at least one pixel with reduced noise, but may also output an amplified analog signal for at least one pixel. Detailed description thereof will be described with reference to FIG. 3.
- the noise (? V_ (n, PGA)? ⁇ 2)? Applied to the at least one PGA 211 may be reduced in inverse proportion to the gain G_SF applied to the at least one source follower 220.
- a noise applied to the at least one AD converter 212 (? V_ (n, ADC)? ⁇ 2) is a gain applied by the at least one source follower 220 and the at least one PGA 211. It can be reduced in inverse proportion to the gain G_PGA applied at.
- the noise reduction unit 210 directly transmits the at least one PGA 211 that applies the gain to the output terminal of the source follower 220 of the at least one pixel which is the position before the noise is applied. By connecting, the noise reduction rate in the noise reduction unit 210 can be improved.
- the at least one AD converter 212 is connected to the at least one PGA 211 and converts an analog signal for at least one pixel to be output into a digital signal for at least one pixel.
- the at least one AD converter 212 samples the output signal of the at least one PGA 211 for the at least one pixel a plurality of times in order to reduce noise of the digital signal for the at least one pixel.
- An oversampling operation and / or an averaging operation for calculating an average value for an output signal of at least one PGA 211 sampled a plurality of times is performed.
- a delta-sigma AD converter is used as the at least one AD converter 212, and at least sampled a plurality of times through an oversampling operation of sampling the output signal of the at least one PGA 211 a plurality of times.
- the average value of the output signal of one PGA 211 is calculated to obtain an averaging effect.
- the at least one AD converter 212 may output a plurality of analog signals of a difference value between a reset voltage for at least one pixel and a signal voltage for at least one pixel output from the at least one PGA 211.
- the digital signal may be converted into a digital signal for at least one pixel and output using an averaging effect.
- Such an averaging operation may reduce noise of the output signal of the at least one AD converter 212 in inverse proportion to a plurality of times of sampling the output signal of the at least one PGA 211 for the at least one pixel.
- the at least one AD converter 212 outputs a value of each of a reset voltage for at least one pixel and a signal voltage for at least one pixel in the at least one PGA 211 as an analog signal for at least one pixel.
- the digital signal of the reset voltage for the at least one pixel converted into the analog signal of the reset voltage for at least one pixel and the signal for the at least one pixel converted into the analog signal of the signal voltage for the at least one pixel are converted.
- the difference between the digital signals of the voltage can be output to the final output.
- At least one AD converter 212 is an analog signal of the difference between the analog signal of the reset voltage for at least one pixel output from at least one PGA 211 and the signal voltage for at least one pixel.
- an oversampling operation of sampling each of a plurality of times, using an averaging effect, converting to a digital signal of a reset voltage for at least one pixel and a digital signal of a signal voltage for at least one pixel, and then at least The difference between the digital signal of the reset voltage for one pixel and the digital signal of the signal voltage for at least one pixel may be output as a digital signal for at least one pixel as the final output.
- the noise reduction unit 210 may reduce the signal-to-noise ratio of the signal processed in the at least one pixel by reducing the noise of the signal processed in the at least one pixel. Therefore, the noise reduction unit 210 according to an embodiment of the present invention may be used for a high sensitivity sensor.
- FIG. 3 is a circuit diagram illustrating at least one PGA according to an embodiment of the present invention.
- At least one PGA 310 is formed of a circuit including a plurality of switching elements as shown in (a).
- the at least one PGA 310 commonly performs an operation of outputting a reset voltage for at least one pixel and an operation of outputting a signal voltage for at least one pixel according to a switching operation of the plurality of switching elements. It can be formed in a single circuit.
- V_IN means a signal (voltage) output from at least one pixel
- V_REF means a reference voltage
- V_OUT means a signal output from at least one PGA 310.
- At least one PGA 310 outputs a reset voltage for at least one pixel by each of the plurality of switching elements being turned on or off to form an equivalent circuit such as (b). can do.
- V_IN denotes a signal V_R at which at least one pixel is reset and output
- V_CM denotes a common mode voltage.
- the at least one PGA 310 is configured such that each of the plurality of switching elements is turned on or off to form an equivalent circuit such as (c), thereby generating a signal voltage for at least one pixel.
- V_IN refers to a signal V_S output by applying a signal to at least one pixel
- V_CM refers to a common mode voltage.
- the at least one PGA 310 controls the values of the capacitors C_1 331 and C_2 332 to apply a gain to the signal voltage for at least one pixel, thereby providing a signal voltage for at least one pixel. Can be amplified and output.
- FIG. 4 is a flowchart illustrating a method of operating a noise reduction unit according to an exemplary embodiment of the present invention.
- a noise reduction unit includes a reset voltage for at least one pixel and a signal voltage for at least one pixel included in a sensor array in at least one programmable gain amplifier (PGA). The difference between and / or each value is output as an analog signal for at least one pixel (410).
- PGA programmable gain amplifier
- the noise reduction unit may determine a difference value between the reset voltage for the at least one pixel and the signal voltage for the at least one pixel and / or each value in order to reduce the noise of the analog signal for the at least one pixel.
- the signal may be output as an analog signal for at least one pixel.
- the noise reduction unit may control a capacitor value included in at least one PGA to amplify and output a signal voltage for at least one pixel.
- the at least one PGA included in the noise reduction unit performing the above-described operation outputs a reset voltage for at least one pixel and a signal voltage for at least one pixel according to the switching operation of the plurality of switching elements. It can be formed as a single circuit to perform a common operation.
- the noise reduction unit converts an analog signal for at least one pixel output from the at least one AD converter into a digital signal for at least one pixel and outputs the signal 420.
- the noise reduction unit uses a delta-sigma AD converter with at least one AD converter, and over-sampling and / or sampling a plurality of times the output signal of at least one PGA for at least one pixel.
- the digital signal for the at least one pixel on which the averaging operation is performed may be output as a final output signal.
- the noise reduction unit performs an oversampling operation of sampling the output signal of the at least one PGA a plurality of times, thereby averaging the average value of the output signals of the at least one PGA sampled a plurality of times is calculated and output.
- the effect may be used to reduce noise of the digital signal for at least one pixel.
- the noise reduction unit may be configured to generate a plurality of times the analog signal of the difference value between the reset voltage for at least one pixel and the signal voltage for the at least one pixel output from the at least one PGA in the at least one AD converter.
- an averaging effect may be used to convert and output a digital signal for at least one pixel.
- the noise reduction unit is configured to generate a plurality of analog signals of a reset voltage for at least one pixel output from at least one PGA and an analog signal of a signal voltage for at least one pixel in at least one AD converter.
- the averaging effect is used to convert the digital signal of the reset voltage for the at least one pixel and the digital signal of the signal voltage for the at least one pixel, and then to the at least one pixel.
- the difference value between the digital signal of the reset voltage and the digital signal of the signal voltage for the at least one pixel may be output as the digital signal for the at least one pixel as the final output.
- the noise reduction unit includes at least one PGA and at least one AD converter arranged for each column of at least one pixel included in the sensor array, thereby providing an analog signal for at least one pixel and at least one pixel.
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Abstract
Description
Claims (14)
- 멀티 애퍼처 카메라(multi aperture camera)의 센서 어레이(sensor arrary)에 포함되는 노이즈 저감 유닛에 있어서,상기 센서 어레이에 포함되는 적어도 하나의 픽셀에 대한 리셋 전압 및 상기 적어도 하나의 픽셀에 대한 시그널 전압 사이의 차이값 및/또는 각각의 값을 상기 적어도 하나의 픽셀에 대한 아날로그 신호로 출력하는 적어도 하나의 PGA(Programmable Gain Amplifier); 및상기 출력되는 적어도 하나의 픽셀에 대한 아날로그 신호를 상기 적어도 하나의 픽셀에 대한 디지털 신호로 변환하여 출력하는 적어도 하나의 AD 컨버터(AD converter)를 포함하고,상기 적어도 하나의 AD 컨버터는상기 적어도 하나의 픽셀에 대한 상기 적어도 하나의 PGA의 출력 신호를 복수의 횟수로 샘플링하는 오버샘플링 동작 및/또는 상기 복수의 횟수로 샘플링된 적어도 하나의 PGA의 출력 신호에 대한 평균값을 계산하는 에버리징(averaging) 동작을 수행하는 노이즈 저감 유닛.
- 제1항에 있어서,상기 적어도 하나의 PGA는상기 적어도 하나의 픽셀에 대한 아날로그 신호의 노이즈를 저감하기 위하여, 상기 적어도 하나의 픽셀에 대한 리셋 전압 및 상기 적어도 하나의 픽셀에 대한 시그널 전압 사이의 차이값 및/또는 각각의 값을 상기 적어도 하나의 픽셀에 대한 아날로그 신호로 출력하는 노이즈 저감 유닛.
- 제1항에 있어서,상기 적어도 하나의 AD 컨버터는상기 적어도 하나의 PGA에서 상기 적어도 하나의 픽셀에 대한 리셋 전압 및 상기 적어도 하나의 픽셀에 대한 시그널 전압 각각의 값을 상기 적어도 하나의 픽셀에 대한 아날로그 신호로 출력하는 경우, 상기 적어도 하나의 픽셀에 대한 리셋 전압의 아날로그 신호가 변환된 상기 적어도 하나의 픽셀에 대한 리셋 전압의 디지털 신호 및 상기 적어도 하나의 픽셀에 대한 시그널 전압의 아날로그 신호가 변환된 상기 적어도 하나의 픽셀에 대한 시그널 전압의 디지털 신호 사이의 차이값을 출력하는 노이즈 저감 유닛.
- 제1항에 있어서,상기 적어도 하나의 AD 컨버터는상기 적어도 하나의 픽셀에 대한 디지털 신호의 노이즈를 저감하기 위하여, 상기 오버샘플링 동작 및/또는 상기 에버리징 동작을 수행하는 노이즈 저감 유닛.
- 제1항에 있어서,상기 적어도 하나의 PGA는복수의 스위칭 소자들의 스위칭 동작에 따라, 상기 적어도 하나의 픽셀에 대한 리셋 전압을 출력하는 동작 및 상기 적어도 하나의 픽셀에 대한 시그널 전압을 출력하는 동작을 공통적으로 수행하는 단일 회로로 형성되는 노이즈 저감 유닛.
- 제1항에 있어서,상기 적어도 하나의 PGA는커패시터 값을 제어함으로써, 상기 적어도 하나의 픽셀에 대한 시그널 전압을 증폭하여 출력하는 노이즈 저감 유닛.
- 제1항에 있어서,상기 적어도 하나의 PGA 및 상기 적어도 하나의 AD 컨버터는상기 센서 어레이에 포함되는 적어도 하나의 픽셀의 칼럼(column) 별로 배치되는 노이즈 저감 유닛.
- 멀티 애퍼처 카메라(multi aperture camera)의 센서 어레이(sensor arrary)에 포함되는 노이즈 저감 유닛의 동작 방법에 있어서,적어도 하나의 PGA(Programmable Gain Amplifier)에서 상기 센서 어레이에 포함되는 적어도 하나의 픽셀에 대한 리셋 전압 및 상기 적어도 하나의 픽셀에 대한 시그널 전압 사이의 차이값 및/또는 각각의 값을 상기 적어도 하나의 픽셀에 대한 아날로그 신호로 출력하는 단계; 및적어도 하나의 AD 컨버터(AD converter)에서 상기 출력되는 적어도 하나의 픽셀에 대한 아날로그 신호를 상기 적어도 하나의 픽셀에 대한 디지털 신호로 변환하여 출력하는 단계를 포함하고,상기 출력되는 적어도 하나의 픽셀에 대한 아날로그 신호를 상기 적어도 하나의 픽셀에 대한 디지털 신호로 변환하여 출력하는 단계는상기 적어도 하나의 픽셀에 대한 상기 적어도 하나의 PGA의 출력 신호를 복수의 횟수로 샘플링하는 오버샘플링 동작 및/또는 상기 복수의 횟수로 샘플링된 적어도 하나의 PGA의 출력 신호에 대한 평균값을 계산하는 에버리징(averaging) 동작을 수행하는 단계를 포함하는 노이즈 저감 유닛의 동작 방법.
- 제8항에 있어서,상기 적어도 하나의 픽셀에 대한 리셋 전압 및 상기 적어도 하나의 픽셀에 대한 시그널 전압 사이의 차이값 및/또는 각각의 값을 상기 적어도 하나의 픽셀에 대한 아날로그 신호로 출력하는 단계는상기 적어도 하나의 픽셀에 대한 아날로그 신호의 노이즈를 저감하기 위하여, 상기 적어도 하나의 픽셀에 대한 리셋 전압 및 상기 적어도 하나의 픽셀에 대한 시그널 전압 사이의 차이값 및/또는 각각의 값을 상기 적어도 하나의 픽셀에 대한 아날로그 신호로 출력하는 단계인 노이즈 저감 유닛의 동작 방법.
- 제8항에 있어서,상기 출력되는 적어도 하나의 픽셀에 대한 아날로그 신호를 상기 적어도 하나의 픽셀에 대한 디지털 신호로 변환하여 출력하는 단계는상기 적어도 하나의 PGA에서 상기 적어도 하나의 픽셀에 대한 리셋 전압 및 상기 적어도 하나의 픽셀에 대한 시그널 전압 각각의 값을 상기 적어도 하나의 픽셀에 대한 아날로그 신호로 출력하는 경우, 상기 적어도 하나의 픽셀에 대한 리셋 전압의 아날로그 신호가 변환된 상기 적어도 하나의 픽셀에 대한 리셋 전압의 디지털 신호 및 상기 적어도 하나의 픽셀에 대한 시그널 전압의 아날로그 신호가 변환된 상기 적어도 하나의 픽셀에 대한 시그널 전압의 디지털 신호 사이의 차이값을 출력하는 단계를 포함하는 노이즈 저감 유닛의 동작 방법.
- 제8항에 있어서,상기 오버샘플링 동작 및/또는 상기 에버리징(averaging) 동작을 수행하는 단계는상기 적어도 하나의 픽셀에 대한 디지털 신호의 노이즈를 저감하기 위하여, 상기 오버샘플링 동작 및/또는 상기 에버리징 동작을 수행하는 단계인 노이즈 저감 유닛의 동작 방법.
- 제8항에 있어서,상기 적어도 하나의 PGA는복수의 스위칭 소자들의 스위칭 동작에 따라, 상기 적어도 하나의 픽셀에 대한 리셋 전압을 출력하는 동작 및 상기 적어도 하나의 픽셀에 대한 시그널 전압을 출력하는 동작을 공통적으로 수행하는 단일 회로로 형성되는 노이즈 저감 유닛의 동작 방법.
- 제8항에 있어서,상기 적어도 하나의 픽셀에 대한 리셋 전압 및 상기 적어도 하나의 픽셀에 대한 시그널 전압 사이의 차이값 및/또는 각각의 값을 상기 적어도 하나의 픽셀에 대한 아날로그 신호로 출력하는 단계는상기 적어도 하나의 PGA에 포함되는 커패시터 값을 제어함으로써, 상기 적어도 하나의 픽셀에 대한 시그널 전압을 증폭하여 출력하는 단계를 더 포함하는 노이즈 저감 유닛의 동작 방법.
- 제8항에 있어서,상기 적어도 하나의 PGA 및 상기 적어도 하나의 AD 컨버터는상기 센서 어레이에 포함되는 적어도 하나의 픽셀의 칼럼(column) 별로 배치되는 노이즈 저감 유닛의 동작 방법.
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US15/555,538 US20180054574A1 (en) | 2015-03-04 | 2015-03-04 | Noise reduction unit included in sensor array of multi aperture camera, and operation method therefor |
PCT/KR2015/002087 WO2016140382A1 (ko) | 2015-03-04 | 2015-03-04 | 멀티 애퍼처 카메라의 센서 어레이에 포함되는 노이즈 저감 유닛 및 그 동작 방법 |
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US20100039544A1 (en) * | 2008-08-01 | 2010-02-18 | Texas Instruments Incorporated | Imaging apparatus and method |
KR20120050248A (ko) * | 2010-11-10 | 2012-05-18 | 에스케이하이닉스 주식회사 | 이미지 센서 |
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JP2007074447A (ja) * | 2005-09-07 | 2007-03-22 | Fujitsu Ltd | Cmosセンサ |
KR20080019376A (ko) * | 2006-08-28 | 2008-03-04 | 삼성전자주식회사 | 멀티 샘플링 평균을 이용한 cds방법과 그 장치 |
US20100039544A1 (en) * | 2008-08-01 | 2010-02-18 | Texas Instruments Incorporated | Imaging apparatus and method |
KR20120050248A (ko) * | 2010-11-10 | 2012-05-18 | 에스케이하이닉스 주식회사 | 이미지 센서 |
KR20140146864A (ko) * | 2013-06-18 | 2014-12-29 | 삼성전자주식회사 | 프로그래머블 이득 증폭기와 이를 포함하는 장치들 |
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