这似乎是一个高精度的放大器，但他的原理是如何实现的呢？

Super_Big_Q

电路中通过时钟控制两个放大器交替输出，同时输入也是交替导通，每个放大器还有一个VREF端，这个电路是个自稳电路吗？他的工作原理又是如何实现的呢？设计的时候需要注意些什么呢？

cppvalor

坐等大佬讲解

lwzunique

ping-pang auto zero类似的原理，clkp存offset，clkn消除offset，clkn存offset，clkp消除offset，交替工作

iWeiguo

三楼正解，从架构上看是Ping-pong auto-zero 放大电路
“Another way to make a continuous-time amplifier by using the
auto-zero technique is the ping-pong technique [3.3]. A ping-pong auto-zero
operational amplifier uses two auto-zero amplifiers, which run in parallel to
each other. While one is being auto-zeroed the other one is used to amplify
the signal (figure 3-1). This way a continuous-time broadband operational
amplifier is created by time-domain multiplexing two auto-zero amplifiers.
One of the amplifiers is always present to allow accurate and stable feedback.
This technique was used to implement a rail-to-rail input [3.4]. This technique
was also implemented with a SAR ADC and digital offset storage [3.5].  ......”
摘自Huijsing 《Dynamic Offset Compensated  CMOS Amplifier》