物理实验教学中心Northwestern Polytechnical University Center for Teaching Experiments in Physics1Analog Electronics Experiment ReportName Group ID Score Class Student ID Experiment Date Experiment Operational Amplifiers I. ObjectivesAn operational amplifier, or op-amp, is a very high gain differential amplifier with high impedance and low output impedance. Typical uses of the operational amplifier are to provide voltage amplitude changes. Oscillators, filter circuits, and many types of instrumentation circuits. An op-amp contains a number of differential amplifier stages to achieve very high voltage gain. 物理实验教学中心Northwestern Polytechnical University Center for Teaching Experiments in Physics2II. Apparatuses（Name、Type and Parameters）The OscilloscopeCurrent meterVoltage meterCapacitor 10nfInductorAmplifier 741Function generator III. Experimental Principle (Describe pithily and using figures if necessary) In our experiment, we will use the operational amplifier A741It is a high performance operational with high open-loop gain, internal compensation, high common mode range and exceptional temperature stability. The A741 is short circuit protected and allows for nulling of offset voltage.IV. Experiment Contents and Methods1. Voltage summing(1) Build the circuit shown below and make the 物理实验教学中心Northwestern Polytechnical University Center for Teaching Experiments in Physics3connections as indicated on the schematic;(2) set the function generator to produce an unbiased 1-kz sinusoid with a 100-mv peak-to-peak voltage, and connect it to the circuit as input signal Vi1 and Vi2. Observe and record the output voltage with oscilloscope.(3) Connect 0.5V direct current voltage to Vi1,Vi2 not change. Observe and record the output voltage with oscilloscope.2. Voltage subtraction(1) build the circuit as follow(2) set the function generator to an unbiased 1-kz sinusoid with a 200-mv peak to peak 物理实验教学中心Northwestern Polytechnical University Center for Teaching Experiments in Physics4amplitude and connect it to the circuit as input signal Vi1.3. Integrator(1) build the circuit as follow(2) set the function generator to produce an unbiased 1-kz square wave with 100mv peak-to-peak voltage. Observe and record the input voltage and output waveform with oscilloscope.(3) Change the value of resistor R1 and capacitor, observe the change of output waveform.V. Experimental Data and Process (List recorded data in Table and present main data process) 物理实验教学中心Northwestern Polytechnical University Center for Teaching Experiments in Physics5 物理实验教学中心Northwestern Polytechnical University Center for Teaching Experiments in Physics6