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Differential Amplifier is an input stage of every op-amp

Started by Patrick Chung December 16, 2014
Generally, if input stage of an operational amplifier is realized as BJT tr=
ansistor differential amplifier, op-amp has smaller slew rate, smaller volt=
age offset and better CMRR. If it's realized as JFET transistor based diffe=
rential amplifier, voltage offset is higher, CMRR is smaller but slew rate =
is better.=20

Read more:

http://www.cirvirlab.com/index.php/tutorials/167-bjt-transistor-based-diffe=
rential-amplifier-and-common-mode-rejection-ratio-cmrr.html

and also simulate:=20

http://www.cirvirlab.com/simulation/Differential_Amplifier_Simulation_Onlin=
e.php