Precision Rectifiers: Recall from basic circuit principles that a rectifier circuits can be implemented with a diode/diodes (half wave rectifier or full wave rectifier). The major limitations of these Precision Rectifiers circuits is that they cannot rectify voltages below VD(ON) = 0.7 V, the cut-in voltage of the diode. In these circuits Vi has to […]
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Three Op Amp Instrumentation Amplifier | Block Diagram | Advantages | Applications: The commonly used Instrumentation Amplifier circuit is one using three op amps. This Three Op Amp Instrumentation Amplifier circuit provides high input resistance for accurate measurement of signals from transducers. In this circuit, a noninverting amplifier is added to each of the basic
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Need of Instrumentation Amplifier: As we know Instrumentation Amplifier are used to amplify the low level differential signals very precisely, in presence of the large common mode noise and interference signals. Hence a good Need of Instrumentation Amplifier has to meet the following specifications : Finite, accurate and stable gain : As very low level
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Instrumentation Amplifier or Data Amplifier: Instrumentation Amplifier – Many industrial systems, consumer systems and process control systems require a precise measurement of the physical quantities like temperature, pressure, humidity, weight etc. A sugar factory requires a measurement of flow, level and temperature of juice. The plastic furnaces require precise measurement of the temperature. The dairy
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Summing Differentiator Circuit: Summing Differentiator Circuit – Similar to the summing integrator, summing can be obtained using the basic differentiator Circuit. It can be obtained by applying more than one input to the basic differentiator Circuit as shown in the Fig. 2.50. The node B is grounded, hence potential of A is also zero. So
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Practical Differentiator: The noise and stability at high frequency can be corrected, in the practical differentiator circuit using the resistance R1 in series with C1 and the capacitor Cf in parallel with resistance Rf. The circuit is shown in the Fig. 2.49. The resistance Rcomp is used for bias compensation. Analysis of the Practical Differentiator:
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Ideal Active Op Amp Differentiator circuit: The circuit which produces the differentiation of the input voltage at its output is called Differentiator. The differentiator circuit which does not use any active device is called passive Differentiator. While the differentiator using an active device like op-amp is called an active Differentiator. Let us discuss the operation
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Summing Integrator Circuit: Many useful circuits can be designed using the basic integrator circuit. One of such useful circuits is the Summing Integrators. It can be obtained by applying more than one input to the basic integrator circuit. The Summing Integrator Circuit is shown in the Fig. 2.43. The node B is ground hence node
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Op Amp Integrator Circuit: In an Op Amp Integrator Circuit, the output voltage is the integration of the input voltage. The integrators circuit can be obtained without using active devices like op-amp, transistors etc. in such a case an integrator is called passive integrators. While an integrators using an active devices like op-amp is called
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Subtractor using Op Amp or Difference Amplifier Circuit: Similar to the summer circuit, the subtraction of 2 input voltages is possible with the help of op-amp circuit called subtractor or difference amplifier circuit. The Subtractor using Op Amp circuit diagram is shown in the Fig. 2.31. To find the relation between the inputs and output
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