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噪声和不匹配是流水线ADC中的重要误差源,采用Matlab软件对它们进行了计算和系统仿真.为了在没有降低表现的情况下控制功耗,采用了相同结构放大器共用相同的偏置电路技术,并且采用了共源共栅补偿技术来降低功耗.还设计并且测试了一个可用于大像素规模CMOS图像传感器系统的10位50MS/s流水线ADC原型.根据测试结果,当采样频率为50MHz时功耗仅为42mW,SINAD为45.69dB.设计在表现和功耗上取得了很好的平衡.
Noise and mismatch are important error sources in pipeline ADC, they are calculated and simulated by Matlab software.In order to control the power consumption without reducing the performance, the same structure amplifier is used to share the same bias circuit technology, And uses cascode compensation technology to reduce power consumption.A 10-bit 50MS / s pipeline ADC prototype is also designed and tested for a large pixel-scale CMOS image sensor system.According to the test results, when the sampling frequency is 50MHz At 42mW, the SINAD is 45.69dB. The design is well balanced in performance and power consumption.