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The most important application of an integrator is to produce a ramp output voltage.įig.4 shows the circuit of an OP-Amp integrator. OP-Amp IntegratorĪn integrator is a circuit that performs integration of the input signal. The gain of the second stage in the Subtractor can be varied to provide an output that is proportional to the difference between the input voltages. Thus output from second OP-Amp is given by: This output is then applied to the summing amplifier, also having unity gain along with V 2. The voltage V 1 is applied to a standard inverting amplifier that has unity gain.īecause of this, the output from the inverting amplifier will be equal to –V 1.
![bidule as summing amp bidule as summing amp](https://www.electrical4u.com/images/2018/may18/1526733031.png)
Such a circuit is called a Subtractor and is shown if fig.3.Īs we can see, this circuit will provide an output voltage that is equal to the difference between V 1 and V 2.
![bidule as summing amp bidule as summing amp](https://vstwarehouse.com/wp-content/uploads/2020/01/smexoscope.jpg)
As SubtractorĪ summing amplifier can be used to provide an output voltage that is equal to the difference of two voltages. The negative sign shows the phase reversal. Note that V out is equal to the average of the three inputs. Referring to fig.1, the output voltage is given by: If we take the ratio of any input resistor to the feedback resistor, we get 3 kΩ/1 kΩ =3. This is equal to the number of inputs to the circuit. Here all input resistors are equal in value (3 KΩ).
![bidule as summing amp bidule as summing amp](https://i.stack.imgur.com/lu6FF.gif)
The ratio of any input resistor to the feedback resistor is equal to the number of input circuits.įig.2 shows the circuit of averaging amplifier.All input resistors (R 1, R 2 and so on ) are equal in value.Here we will discuss the following two applications:īy using the proper input and feedback resistor values, a summing amplifier can be designed to provide an output voltage that is equal to the average of input voltages.Ī summing amplifier will act as an averaging amplifier when both of the following conditions are met: There are a number of applications of summing amplifiers. Thus, when the gain of summing amplifier is unity, the output voltage is the algebraic sum of the input voltages. Thus the output voltage is proportional to the algebraic sum of the input voltages.
![Bidule as summing amp](https://kumkoniak.com/74.jpg)