In the ideal device, a very small value of Vs results in the maximum value of Vo which is determined by the limits of the power supply (± 12 V). It is important to keep them in mind in order to understand the applications: (a) The gain of the amplifier is infinity real devices have values of A ranging from 104 to 108.
The following important properties are those of an ideal operational amplifier. Note that the power supply is normally not shown in circuit diagrams. The power taken from the amplifier is derived from a power supply which usually delivers +12 V and -12 V in the case of solid-state devices. The fundamental property of this amplifier is that the output voltage Vo is the inverted, amplified value of the voltage Vs thus, if the gain of the amplifier is A, Vo = -AVsįigure 1: Schematic of an operational amplifier the numbers refer to pins on the 741 solid state type.
Vs is the voltage of the inverting input (-) with respect to the non-inverting one (+). The output voltage Vo is measured with respect to ground, the common terminal on the power supply. It is normally represented by a triangle the input designated (+) is non-inverting, and that designated (-) inverting (Fig.
The operational amplifier is a device with two inputs and one output. In this experiment, we will examine the properties and uses of operational amplifiers. The most important element in analog instrumentation is the operational amplifier.
0 kommentar(er)
