Amplificadores Operacionais

Operational Amplifiers

The term operational amplifier or "op-amp" refers to a class of high-gain DC coupled amplifiers with two inputs and a single output. The modern integrated circuit version is typified by the famous 741 op-amp. Some of the general characteristics of the IC version are:

High gain, on the order of a million High input impedance, low output impedance Used with split supply, usually +/- 15V Used with feedback, with gain determined by the feedback network.

Their characteristics often approach that of the ideal op-amp and can be understood with the help of the golden rules.