A Brief Look at Operational Amplifiers

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Operational amplifiers (Op Amp) have been in use for quite a long a long time now in the field of electronics and electrical engineering. A basic Op Amp has got three connections consisting of 1 output and 2 inputs. For definition purposes the two input terminals are called inverting and non-inverting inputs (Huijsing, 2011). Huijsing (2011) adds that it has been found and proven that when the voltage at both points of the inputs is the same, there will be no output on the other side. The image below shows an ideal Op Amp with the terminals shown. FIGURE 1 For an ideal Op Amp the input impedance is infinite for the load and 0 for the source output so this means it can be used as a buffer and an ideal source of voltage and current (Storr, 2014).Carter and Mancini (2009) noted in their book that feedback is always necessary in this amplifier so as to reduce the gain because they have an infinite gain (around a million) when the loop is open but this gain is dependent on the amount of input voltage, so if we apply 0.000001V input the output will be 1V. Application of the Op Amp in circuits is diverse but in this report two circuits will be covered namely the integrator and differential circuit. INTEGRATOR CIRCUITS FROM OP AMP A basic mathematical definition of integration is the main tool used to define this type of amp circuit. In other terms the input signal is integrated so that the outcome is the output signal. This circuit is
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