Calculation of CMRR of a CMOS active load differential amplifier

for three modes: ۲۷ ºC temperature and TT process corner, -۴۰ ºC temperature and FF process, ۸۵ ºC temperature and SS process corner, we get the parameters for this amplifier in ۹۰ nm CMOS technology. The differential amplifier is one of the most important circuit inventions and dates back to the time of electronic lamps. Differential operation is one of the main options in analog and mixed circuits due to its many advantages. In this article, Hspice was used to obtain differential mode voltage gain (Ad) and common mode voltage gain (Ac). this circuit has ۶ MOSFETs and as a result, ۱۲ lengths and thicknesses the channel will be MOSFET The signal is of good quality. Likewise, Excel and MATLAB programs were used to obtain more accurate values and graph shapes. CMRR measures the ability of the differential amplifier It is for rejecting common mode signals and only differential amplification (or voltage difference between two input signals).

Keywords:

Amplifier , differential mode voltage gain , common mode voltage gain , CMRR