One of the defining traits of analog CMOS designers is the ability to implement a common-mode feedback (CMFB) loop. When the input devices on a differential pair are all NMOS (or NPN), and the loads are either inductors or resistors, a common-mode feedback loop is unnecessary, because the output resistance of the differential pair is [...]
Tag Archives: common mode
A compact common-mode feedback loop | using a PMOS triode device for CMFB
Posted in Analog Professional Also tagged bias, CMOS, continuous time, feedback, load, loop, opamp, OTA, stability 5 Comments