10/10/17 Non - Inverting Amplifier

Non - Inverting Amplifier

Date: 10/10/17

Overview 

            Gain an understanding of simple single operational amplifier-based circuit that are commonly used in circuits used to implement mathematical operations such as voltage gain within a circuit. 

In this lab, we will gain an understanding of a non-inverting op-Amp (op-Amp27) circuit diagram and how to complete the circuit using a 8-pin op-Amp and see the relationship between Voltage(in) and Voltage(out).

Pre-Lab

          a) Find gain ( Vout / Vin ) in the circuit.

(independent power sources)

(using Analog Discovery)

             b)  Why is the circuit called a non-inverting voltage amplifier?
               A inverting op-Amp provides an inverted polarity gain from voltage input in respects to voltage output, where as a non-inverting op-Amp provides a positive voltage gain.

Lab Procedure 

            c)   Apply +5 volts to Vcc(+) and -5 volts to Vcc(-)
            d)  For Voltage input,  go from –3 volts to +3 volts in increments of .5 volts. Record results.
            e) find slope

Results (using both analog discovery and independent power sources)

       

Non-inverting op-Amp27 using Analog Discovery

Non-Inverting opAmp27 using independent power sources

Data collected for V(in) and V(out) 

(analog discovery)

(data for analog discovery circuit)

(independent power sources)

(independent power sources)

(independent power sources)

Plot of data

(analog discovery)

(non inverting op-Amp27 using Analog Discovery)

(non inverting op-Amp27 using Analog Discovery)
Slope (gain) = 2.5, which equals the same gain from prelab for analog discovery

(independent power sources)

(independent power sources)

(independent Power Sources)
Slope (gain) = 3, which equals the same gain from prelab for independent power sources

Conclusion 

        At first, like our inverting op-Amp, we weren't able to figure out how to make the circuit using independent power sources so our group, along with other groups ended up using Analog Discovery. We got the help from Kyle to make the analog discovery circuit. I then went home and tried multiple using independent power sources because previous labs and future labs didn't work after figuring out how to do the Inverting op-Amp, I re-did the non-inverting op-Amp. 

Our calculated voltage out for both circuits matched 100% with the actual voltage out resulting in 0% error. I used TinkerCad App to try troubleshoot the independent power sources because I don't have a personal analog discovery tool to retry at home. 

Below is both TinkerCad App and EveryCircuit. 

(non-inverting op-Amp741 using TinkerCad App for independent power  sources)

jkh

(non-inverting op-Amp using EveryCircuit)