This increases the common-mode rejection ratio (CMRR) of the circuit and also enables the buffers to handle much larger common-mode signals without clipping than would be the case if they were separate and had the same gain.
Dette øger kredsløbets common-mode rejection ratio (CMRR) og tillader bufferne at kunne håndtere meget større common-mode signaler uden klipning som ellers ville være tilfældet hvis de var separate og havde samme forstærkning.