⚡ 本页包含 AI 生成的分析内容，仅供参考
该论文提出了一种斩波运算放大器，实现了10MHz带宽、4微秒大信号建立时间、6.5nV/√Hz噪声和2微伏失调，解决了精密测量系统中对高精度、低噪声和快速响应的需求。
Low-offset and low-noise operational amplifiers (OpAmps) are essential for precision measurement systems. Applications such as precision weigh scales, sensor front-ends, bridge transducers, interfaces for thermocouple sensors, and medical instrumentation require amplification of low-level signals with high closed-loop gain and low noise. An OpAmp with high precision and fast response enables more frequent measurement of sensor signals leading to more accurate control. Offset and its temperature drift in a traditional CMOS OpAmp cannot be made less than 100μV/0.5μV/°C even with multi- temperature trimming, with flicker noise corner at 100’s of Hz. Reduction of the offset and flicker noise below these limitations can be achieved by chopping (correlated double sampling) of the input signal [1]. Disadvantages of chopping are: increase in OpAmp input current, caused by charge injection through input
Vadim Ivanov, Munaf Shaik
Texas Instruments, Tucson, AZ