In an open-loop configuration, an ideal operational amplifier (op amp) behave as a comparator. The behaviour of op amp as a comparator is due to infinite open-loop gain. When it is working as a comparator, there are only two outputs possible at the output of op amp. Op amp as a Comparator Figure 1 shows … Read more
A non inverting amplifier is an operational amplifier circuit which produces an amplified output signal which is in phase with the input signal. Non Inverting operational amplifier Figure 1 shows the basic non-inverting operational amplifier. The input signal Vi is applied directly to the non-inverting terminal while one side of resistor R1 is connected to the inverting … Read more
An inverting amplifier is an operational amplifier circuit which produces amplified output that is 180° out of phase to the applied input. Inverting amplifier is also known as inverting operational amplifier or inverting op-amp. Inverting operational amplifier Figure 1 shows the basic inverting operational amplifier. The input signal Vi is applied to the inverting terminal … Read more
Voltage follower is an op-amp circuit that has a voltage gain of unity. It means that whatever voltage is applied at the input of the op-amp, the same voltage comes at the op-amp output. There is no amplification of the voltage. Hence we can say that the output voltage directly follows the input voltage. The … Read more
Summing Amplifier is an electronic circuit that produces output as a weighted sum of the applied inputs. It is also known as Op-amp adder. Basically it performs mathematical operation of addition. In this article, we will see the summing amplifier circuit, its working and its applications. Summing Amplifier Circuit The summing amplifier circuit is shown … Read more
Current to Voltage Converter or I-V converter is an electronic circuit that produces a voltage that is proportional to the applied input current. It is used where we need to measure the output current but the measuring instrument is capable of measuring voltages only. In this article, we will see the op-amp based I-V converter, … Read more
Voltage to Current Converter or V-I converter is an electronic circuit that creates a current that is proportional to the applied input voltage. Basically it maintains the load current at a value that is independent of the load impedance variation. In this article, we will see the different op-amp based V-I converter, its working and … Read more
Op-amp Differentiator is an electronic circuit that produces output that is proportional to the differentiation of the applied input. Basically it performs mathematical operation of differentiation. In this article, we will see the different op-amp based differentiator circuits, its working and its applications. Basically two circuits are there to perform the differentiation function. First, using … Read more
Op-amp Integrator is an electronic circuit that produces output that is proportional to the integration of the applied input. Basically it performs mathematical operation of integration. In this article, we will see the different op-amp based integrator circuits, its working and its applications. Basically two circuits are there to perform the integration function. First, using … Read more
AntiLog amplifier or anti–logarithmic amplifier is an electronic circuit that produces output that is proportional to the anti-logarithm of the applied input. Basically it performs mathematical operation of an anti-logarithm. In this article, we will see the different antilog amplifier circuits, its working and antilog amplifier applications. Basically two circuits are there to perform the … Read more