Exercise 2 Summing difference amplifiers i On the oscilloscope display and

# Exercise 2 summing difference amplifiers i on the

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Exercise 2. Summing & difference amplifiers i. On the oscilloscope, display and simultaneously and save a screenshot. a) The non-inverting summing amplifier was built using two 3kΩ resistors for Ri
BMEN 3120 Operational Amplifiers and the feedback resistor(Rf) and two 750Ω resistors for the two input resistors(Ra and Rb). Vs1 was a triangular wave which was represented by input, which had peak- to-peak voltage of 1 V, a frequency of 100 Hz, and 0 DC voltage offset. Vs2 was a sine wave represented by input b, which had peak-to-peak voltage 0.5 V, a frequency of 1kHz, and 0 DC voltage offset. i. The oscilloscope display below simultaneously displays Vs1 and the output voltage(Vo1) from the summing amplifier. Vs1 is the input triangular wave in green and the output voltage(Vo1) is the result of the addition of a triangular and sine wave to produce a summed waveform that is a combination of both. Vo1 is displayed in yellow. All waveforms remain continuous in this particular case. The summed wave has a relatively similar amount of oscillations to the triangular input wave. ii) The oscilloscope display below presents Vs2 simultaneously with the output waveform(Vo1). Vs2 is showcased in yellow while the output waveform is shown in green. The sine wave has a large amount of oscillation, but much was lost when added to the triangular wave, since some regions had no overlap of the two waveforms.
BMEN 3120 Operational Amplifiers b) A difference amplifier was then connected to the summing amplifier. All four resistors(Ra,Rb,Rc, and Rd) used in this amplifier were 2kΩ. Ra and Rc served as input resistors. The output sine plus triangular wave from part a or Vo1 was used as input in this circuit and a rectangular pulse from the waveform generator (Vs3) generated from a saved file with a voltage gain of 0.5 V and 3kS/s (kilosamples/seconds) update rate was represented by input c. i) The oscilloscope display below displays Vo1 simultaneously with Vo2(the output of the difference amplifier. Vo1 is shown in green and Vo2 is shown in yellow. The output of the summing amplifier(Vo1) is continuous but subtracting a rectangular pulse results in subtraction of some regions of the waveform resulting in a discontinuous triangular sine wave as the output of the difference amplifier.
BMEN 3120 Operational Amplifiers ii)The oscilloscope screen below presents Vs1 along with the Vo2. Vs1 is the triangular wave in green and Vo2 is the discontinuous wave in yellow. The input triangular wave displayed with discontinuous triangular sine wave shows one of the original sources of the continuous triangular sine wave.

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