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READOUT CIRCUIT, READOUT STAGE, IMAGE SENSOR, ELECTRONIC DEVICE AND METHOD FOR READING OUT AN IMAGE SENSOR
READOUT CIRCUIT, READOUT STAGE, IMAGE SENSOR, ELECTRONIC DEVICE AND METHOD FOR READING OUT AN IMAGE SENSOR
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机译:读出电路,读出阶段,图像传感器,电子设备以及用于读出图像传感器的方法
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摘要
A readout circuit for an image sensor having a pixel array with at least one pixel group, in particular pixel column, with a plurality of pixels connected to a group bus comprises a group input for connecting to the group bus and a signal output for connecting to an input of an ADC. The readout circuit further comprises a first and a second reference terminal for receiving a first and a second reference voltage. A sampling bank comprises at least two sample-and-hold elements connected in parallel between the group input and an output of the sampling bank and further comprises a bypass switch connected in parallel to the sample-and-hold elements. A charge store is connected between the output of the sampling bank and the signal output. A first charge switch is connected between the first reference terminal and the signal output, and a second charge switch is connected between the second reference terminal and the output of the sampling bank.
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