论文部分内容阅读
从七十年代后期起,集成运算放大器已不再为双极工艺所垄断,CMOS 技术开始进入模拟集成电路这一领域,发表了诸如 MC14573 CMOS 四运放、ICL7650 CMOS 斩波稳零高精度运放等一系列性能优越的通用产品。国内,上无十四厂推出了 CH3130、CH4573、CH7650等 CMOS 线性电路,为仪表设计——特别是电池供电的便携式仪表提供了新型运放,反映了我国集成运放所达到的新水平。但是工业仪表所接收的信号往往是微弱的直流信号,如热电偶的μV级热电势、光电池的μA级光电流,测量桥路的 mV 级变送电压等等,对集成运放的静态运算精度、动态稳定
Since the late 1970s, integrated operational amplifiers are no longer monopolized by bipolar processes, and CMOS technology has begun to enter the field of analog integrated circuits with features such as the MC14573 CMOS quad op amp, the ICL7650 CMOS chopper-stabilized high-precision op amp And a series of superior performance of common products. Domestically, XFG14 introduced CMOS linear circuits such as CH3130, CH4573 and CH7650, providing a new type of op amp for meter design, especially for battery-powered portable meters, reflecting the new level reached by China’s integrated op amp. However, the signal received by industrial instrumentation is often a weak DC signal, such as μV thermocouple thermocouple thermocouple, μA photocathode photocurrent, measuring bridge mV-class transmission voltage, etc., the op amp’s static operation accuracy , Dynamic stability