Electronics (coursework 1 of 1) operational Amplifier Design Coursework

Electronics ( 1 of 1) operational Amplifier Design - Coursework Example Non-ideal Op Amps might have inputs, at the two pins, having unequal voltages; there may be current flowing out or into the two input pins. The non-ideal characteristics are responsible for circuit loading, introduced noise, and the reduced Gain and input resistance (Rin). Input offset voltage is a small voltage that is applied at the input terminals in order to make the output voltage zero when two inputs’ terminals are grounded. A number of signal inputs can be integrated into the inverting amplifier via connection of individual sources with separate resistors to an Op Amp’s input; this will result into inverted sum of all the inputs. A summing amplifier’s input combinations produce an output that reflect weighted sum of the total inputs. Figure 1 shows a summing amplifier, a modification of an inverting amplifier; the inverting amplifier has been utilized since it can handle several or many inputs simultaneously. The summing amplifiers are practically used audio mixers and digital temperature recorders. A prelab procedure was carried on a summing amplifier as shown in Figure 1 with the power supplies at  ±10 V, choosing R1 to be 4.7 kâ„ ¦, hence VOUT= - (2 VA + VB ) if R3 = R1 = 10kâ„ ¦. Pspice was utilized in verifying both hand-calculations and the circuit operation. The circuit’s plots were taken, gains compared between hand-calculations and theoretical, and the ratio of VOUT and VIN were observed using the waveform amplitudes. The circuit was maintained as above in the Figure.2, and values from the prelab were used. The dual supply was  ±10 V. A 3 Vpp and 1 kHz sine was channeled at input A while a voltage of 7V from the power supply was channeled at input B. Accurate sketches of the output and input waveforms were taken; using a â€Å"DC† couple oscilloscope. From the formula = = 2VA + VB it is possible to obtain the Digital to Analogue Conversion