EE 3950 Chapter : EE3950 Class Notes Chapter 9
Document Summary
The operational amplifier, also know as an op amp, is essentially a voltage amplifier with an extremely high voltage gain. One of the building blocks for the construction of analog electronics systems. I t may be combined with various external components for a wide variety of purposes. They are usually fabricated as an integrated circuit, an array of transistors, resistors, and capacitors, on a single silicon chip. Di p dual in-line package is the most common package form. An ideal amplifier is defined as: v out va v in. An op amp is built as a differential amplifier, where the output voltage is defined as the product of the gain with the voltage difference between of the amplifier"s two inputs. This means that any stray noise appearing on both inputs are cancelled, and only the voltage difference is amplified. I t has two inputs: (cid:132) v+ - the non-inverting input; (cid:132) v- - the inverting input.
