NMOS (N-channel metal oxide semiconductor) linear array image sensor with segmental integral reading circuit

Abstract

The invention relates to an NMOS (N-channel metal oxide semiconductor) linear array image sensor with a segmental integral reading circuit. Output signals are connected with a video signal line through a gating switch, and bias voltage is connected with an output signal end through a series resistor; when a reading switch of a certain image element is on, if a corresponding gating switch is off, a circuit is in an open-circuit state, signals in the image element cannot be output to a signal output end, and the bias voltage cannot perform charge resetting on a circuit inside the image sensor; if the gating switch is on, the signals in the image element can be output to the signal output end, and the bias voltage can perform charge resetting on the image sensor. The NMOS linear array image sensor can realize integration of input light signals at different integral time through different image elements, namely a segmental integral function.

Description

technical field [0001] The invention relates to an NMOS linear array image sensor, in particular to an NMOS linear array image sensor with a segmented integral readout circuit. Background technique [0002] When the general-purpose products of NMOS line array image sensors are working (using the existing common driving method), in one read operation, the signals of all pixels can only be read out at one time, and the integration time of all pixels is the same. figure 1 , figure 2 The principle of readout of signal charge in one pixel is shown. During the readout process of a frame of image data of the NMOS line array image sensor, all the pixels are under the control of the external drive pulse and the internal logic circuit, the corresponding readout switch of each pixel is turned on in turn, and the image in the pixel The data is also read out sequentially, and the signals of all picture elements appear at the output signal end in sequence. During readout, the external...

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Problems solved by technology

[0004] However, the customization of NMOS line array image sensors is costly and has a long product cycle. Since it is not a general-purpose product, the reliability of the product also requires additional assessment and verification.

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