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High scanning frequency CMOS-TDI image sensor
High scanning frequency CMOS-TDI image sensor
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机译:高扫描频率CMOS-TDI图像传感器
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摘要
The present invention relates to technical field of analog integrated circuit design. TDI function is better realized by CMOS image sensor and it improves scanning frequency of the CMOS-TDI image sensor and extends application range of TDI technique. To this end, the present invention proposes a technical solution of high scanning frequency CMOS-TDI image sensor. The pixels include a photodiode, an operational amplifier, integration capacitors C1 and C2 of the same capacitance, an offset voltage removing capacitor C3, and plural switches S1-S10. The anode of the photodiode is connected to a zero voltage ground wire, while the cathode thereof is connected to one end of the switch S9. The other end of the switch S9 is connected to a reference voltage Vref. The above pixels are cascaded and an output end of the last pixel is connected to a column-parallel ADC through a readout switch Read. The invention mainly applies to analog integration circuit design.
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