OP-AMP with Negative Feedback

Differential Input and Differential Output Amplifier: In almost all the applications, the op-amp is employed with a single-ended or unbalanced output. However, there are certain applications in which a differential output is desired. The differential input and differential output amplifier is widely employed as a pre-amplifier and in driving push-pull arrangements. One possible arrangement of …

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Three Op Amp Differential Amplifier: Three Op Amp Differential Amplifier, depicted in Fig. 34.47 consists of two stages—one formed by op-amps A1 and A2 and second by op-amp A3. Hence for determination of overall voltage gain of the circuit shown in Fig. 34.47, it becomes imperative to determine the voltage gain of each stage. The first …

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Differential Amplifier with Two Op Amp: The gain as well as input resistance of the differential amplifier can be increased by using two op-amps. The characteristics of such an amplifier are identical to those of a noninverting amplifier. A practical circuit using differential amplifier with two op amp is given in Fig. 34.46. The circuit …

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Op Amp Differential Amplifier Circuit Diagram and its Operation: An ideal difference amplifier amplifies only the difference between two signals; it rejects any common signals to the two input terminals. For instance, a microphone system amplifies an audio signal applied to one terminal of a difference amplifier, and rejects any 50 Hz noise signal or …

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