19 step Give the inputs 699 2 L Aude driplay Duty cycle Cupp offset value Coscilloscope 16.75 ut be observo the wave for w the output and also used to find mavimo value period by using traces it is a usual representation at the out put step step 2 over time Power onthe oselloscope For two channels oscilloscope Connet Channel for input side SINC and connect channels oscillescope Comect channel fo to that observe wave steps on outed analyz Oscilloscope it has controls lik time base trigget and vertical of those are used to trace the wav or change the vertical division. an the scule to represant t waveform or triggeruseto Stable wave form A = 1 B=9 (10+1) KHZ = 11KHZ Frey (10+A) KHz = (1•AB) = 1.19V Amplited F=1 A 1.1914 input=1260 impa = 0.74 Gran 20log = 1 25 10.74 1.26 = 32 63/n Lab 5 RC AND RL AC CIRCUITS Foundation Electronics Michael Johnson RC and RL AC Circuits OBJECTIVE 1. Examine the AC behaviour of Resistor-Capacitor (RC) and Resistor-Inductor (RL) networks. 2. Introduction to the concepts of Amplitude, Gain, Phase Angle and Time Delay. 3. Introduction to the concept of Impedance. EQUIPMENT The following equipment will be required for this lab: - 1. Function Generator 2. Breadboard 3. Various Resistors, Capacitor and Inductor 4. Oscilloscope 5. BNC Cables/Leads Your breadboard circuits should look something like this when built: - PPCTO-BOARDB 503 POWER 0 FREQ AMP 1.0 FUNCTION GENERATOR 222 TTL DE UNCED PUSHBUTTONS PB2 BNC J1 LOGIC SWITCHES SHELL S1 S2 S3 S4 S5 S6 S7 S8 DJUSTMENT wwwww wwww wwww w******** wwwww.***************wwwww wwwww wwwww wwwww POT W R2 SPDT SWITCHES TIL 13-15V 13-15V HIGH CMOS LOW LOGIC INDICATORS 80 SPEAKER PIN BNC $10 ור SHELL THEORY At the start of this lab, we will give you a brief tutorial on how to measure amplitude and phase difference for RC and RL circuits using the OSCILLOSCOPE. In advance of the lab, you should have calculated the output amplitude and phase of the circuit signal(s) for your particular student ID number. PROCEDURE Part 1 - RC Circuit Build the RC circuit as shown in Figure 1: - i(t) Vin ( + OV 10ΚΩ VA(t) R Figure 1 Simple RC Circuit - C vc(t) 1nF • • • • • Set the Function Generator, Vin(t), to the same settings which you used for Assignment #2 for this module. Set the input signal to be a SINE wave input. Sine Wave Amplitude: - Set the amplitude, VP, of your sine wave input to be (1 + 0.AB) Volts, where AB are the LAST TWO DIGITS of your student ID number. Sine Wave Frequency: - Set the frequency, f, of your sine wave input to be (10+A) kHz. You can assume the offset for the sine wave is OV (i.e. it is centered on the X axis) and you can assume the input phase for the sine wave is 0 degrees (i.e. the sine wave starts climbing in its positive half cycle when time t=0). • For this input sine wave, calculate the period, T, (using the formula T = 1/f, measured in seconds). • Display Vin(t) and VA(t) on the Oscilloscope using two sets of scope leads. Make sure to display Vin(t) using Channel 1 and VA(t) using Channel 2. • Take a picture of the front of the oscilloscope to upload to Brightspace with your lab report. Include your Student ID card in the image to show that it is your own, original work. The image should look something similar to what is shown in Figure 2- TELEDYNE LECROY Trig'd =15.9001 KHz CH1= 500mV CH2 500mV M 10.0ps CH1/0.00mV M Pos:31.60ps • • • • Figure 2- Example Oscilloscope Output for Figure 1 (Yellow = CH1, Blue = CH2) SKETCH this waveform into the Results section of your lab report for this part of the lab. Make sure to label the value(s) on the X (time) and Y (voltage) axes for the signals. Measure the periodic time, T from the oscilloscope traces. Using the relevant cursors on the Oscilloscope, measure the peak amplitude of vi(t) and vo(t), denoted by Vo and Vi respectively. Determine the gain, Vo/Vi, and express in decibels [dB] using the formula provided. gain [db] = 20 log10 V Measure the time difference, AT, between vi(t) and vo(t), noting whether vo(t) is lagging behind (coming after it on the scope, viewed from left to right) or leading (coming before it on the scope, as viewed from left to right) the input signal, vi(t). Use the following formula to calculate the phase of the output signal from this measurement as follows: - Ø [deg] = AT (笑) T 360° • If you are working with a lab partner for this lab, repeat this procedure using the settings for THEIR student ID number to generate the measurements/results for this part of the lab. Part 2 - RL Circuit • Next, consider the comparable RL circuit, shown in Figure 3: - Vin ( i(t) 10ΚΩ OV R L 100mH eee v₁(t) v₁(t) • • • • • Figure 3-Simple RL Circuit Similar to Part 1 of the lab, set the Function Generator, Vin(t), to the same settings which you used for Assignment #2 for this module. Set the input signal to be a SINE wave input. Sine Wave Amplitude: - Set the amplitude, VP, of your sine wave input to be (1 + 0.AB) Volts, where AB are the LAST TWO DIGITS of your student ID number. Sine Wave Frequency: - Set the frequency, f, of your sine wave input to be (10+A) kHz. You can assume the offset for the sine wave is OV (i.e. it is centered on the X axis) and you can assume the input phase for the sine wave is 0 degrees (i.e. the sine wave starts climbing in its positive half cycle when time t=0). For this input sine wave, calculate the period, T, (using the formula T = 1/f, measured in seconds). Display Vin(t) and VA(t) on the Oscilloscope using two sets of scope leads. Make sure to display Vin(t) using Channel 1 and VA(t) using Channel 2.