模拟集成电路是什么 模拟集成电路的工作原理

Release time：2023-03-16
author：AMEYA360
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　　模拟集成电路是由电容、电阻、晶体管等组成的模拟电路集成在一起用来处理模拟信号的集成电路。模拟集成电路的种类有：如运算放大器、模拟乘法器、锁相环、电源管理芯片等。模拟集成电路的主要构成电路有：放大器、滤波器、反馈电路、基准源电路、开关电容电路等。

模拟集成电路是什么 模拟集成电路的工作原理

　　一、模拟集成电路工作原理

　　在信息技术中，数字集成电路是主角，其处理对象是以数字信号承载的信息，而数字信号在时间、量的方面是取离散值的。但是自然界的信号在时间和量方面的变化是连续的，比如风声、水流量等，这样的信号称为模拟信号（Analog Signal），相应地，处理模拟信号的电路称为模拟电路，而用来处理模拟信号的集成电路则称为模拟集成电路。显然数字电路是无法直接跟自然界打交道的，只是为了处理或传输的方便，为了充分利用数字系统的优点，把模拟信号先转换为数字信号，输入到大容量、高速、抗干扰能力强、保密性好的现代化数字系统处理后，再重新转换为模拟信号输出。

　　集成电路的主角是晶体管，模拟集成电路也不例外，只是其利用的是晶体管的放大作用，而数字集成电路则是利用晶体的开关作用。早期的模拟集成电路大都使用双极型晶体管，由于CMOS工艺的成熟，克服了早期CMOS电路速度较慢的缺点，并且有着功耗低和工艺升级换代方便的优点（CMOS的等比例缩小），如今模拟集成电路和数模混合集成电路（数字电路和模拟电路集成在一起）也常用CMOS来设计和实现了。


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