cuatro Qualities Investigation off Most readily useful Working Amp
3.1 Work in Linear Area
In the event the best op amplifier functions on the linear region, the productivity plus the enter in current inform you a great linear dating. In which u0 is the yields current of incorporated op u+ and you can u- are definitely the voltages in the non-inverting input critical and the inverting type in terminal, respectively. Auo ‘s the discover circle differential current magnification. With respect to the properties of one’s finest op amplifier, a couple of essential functions of one’s better op amp regarding linear region.1) No differential enter in voltageSince the brand new discover-cycle differential current magnification out of a fantastic op amplifier is actually equivalent to infinity, and the returns current are a particular value, the fresh new current values during the low-inverting enter in terminal plus the inverting type in terminal is approximately equivalent. Same as short circuit between input and you will efficiency, but it’s fake. Because it’s an identical short-circuit, maybe not a real short-circuit, so this phenomenon is known as “virtual brief”.2) Zero input currentSince the fresh new discover-cycle type in opposition out-of a great op amplifier is actually infinite, zero newest moves towards op amp during the either type in. (閱讀全文…)