消除CMOS读出电路噪声方法研究

Methods of canceling noises in CMOS read-out integrated circuit

对红外焦平面阵列CMOS读出电路中几种常见的噪声及其抑制技术进行了分析和讨论,重点研究了消除读出电路噪声的新方法———双复位法。该方法克服了以往相关双取样的缺点,没有增加电路功耗和硅集成电路的复杂程度,只要电容参数选择合理,理论上能完全消除KTC噪声,而且对1/f噪声也起到抑制作用。

The noises and suppression technology in IRFPA CMOS read\|out integrated circuit are analyzed. A new method avoiding the shortage of correlated double sampling method is studied, which can cancel noises without adding power consumption and complexity of silicon technique. In principle, KTC noise can be completely cancelled by this method if the values of capacities are properly selected. Furthermore, the 1/f noise can also be suppressed.