1 / 52

Information about the LO

Information about the LO. Subject: Electronics circuits design Sub-Domain (optional ): BJT amplifier design Course name :Electronics Circuit Education Level (UG/PG ):UG 2-3 line description of the topic of the LO :

gunnar
Download Presentation

Information about the LO

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Information about the LO Subject: Electronics circuits design Sub-Domain(optional): BJT amplifier design Course name :Electronics Circuit Education Level(UG/PG):UG 2-3 line description of the topic of the LO: Defines Q point and its location on the load line. This LO explains relation between Q point location and amplification of the input signal. Author/s : Madhuri Mavinkurve Mentor: Prof.Sahana Murthy Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 1

  2. Introduction of Q point This learning object is created to explain concept of Q point and how to locate Q point graphically and how its location is related to amplification Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 2

  3. Learning objectives- • After interacting with this Learning Object, the learner will be able to 1. Locate Q point of the given circuit. • 2. Draw output voltage for given input voltage • 3. Draw output current for given input voltage. • 4. Explain relation between Q point and amplification of input voltage. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 4

  4. Key words in this LO These are the keywords and their description in this LO Output characteristics –This is graphical representation of relation between output current and output voltage for change in input current of given transistor. Dc load line- This line is drawn on transistor characteristics to study voltages and currents in the given circuit under dc conditions. This line joins two points as VCC ON X axis and Ic = VCC/Rc on Y axis. Q POINT—It is dc operating point of BJT amplifier. It represents output voltage and current of given circuit under no signal(quiescent) condition Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 5

  5. IMPORTANT NOTE TO THE ANIMATOR: • Please see the design template provided in slide no7. • This is a sample template, and you are free to change as per your design requirements. • Each slide with yellow background and red text are instructions to animator specific to slide . • All the instructions/labels or anything WRITTEN in blue are CONTENT NOT TO BE DISPLAYED! • All the instructions WRITTEN in black are CONTENT TO BE DISPLAYED! • This is not applicable for images as there can be overlapping of these colours there. This should be followed for all the instructions, labels,etc… • Kindly keep a note of this while displaying text in the animation. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 6

  6. Animation layout Design tips Characteristics Determine parameter Measure IBQ Relation of Q point to amplification of input signal Add this tab Question panel Place all buttons at location shown Fig/images /characteristics /Circuit diagram Show instructions to user if any in this box feedback box Action buttons

  7. Stepwise description of action: table for step 1 Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 8

  8. Characteristics

  9. Stepwise description of action: Sample image for step 1 Question panel Q. Which of the following characteristics do you need to observe to find output voltage amplification ? Characteristics 1 3 2 Feedback for fig.3 Feedback for fig.1 Feedback for fig.2 You have selected two correct options Next Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 10

  10. 1.Given characteristic are samples, redraw these images suitable to screen space and can be appropriately visible to user. 2. Show association between characteristics and buttons 3. Each button is clickable and with each button clicked by user dark the button for 1 sec and highlight the corresponding option Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 11

  11. Stepwise description of action: table for step 1 Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 12

  12. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 13

  13. “You have selected two correct options Next” Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 14

  14. Stepwise description of action: Sample image for step 2 IC Output characteristics IB3 Load line IB2 2. Display this button IB1 FIG.2 IB0 1.High light words shown Next: Determine the parameter VCE The characteristics required to decide amplification are load line superimposed on output characteristics. However these characteristics are not sufficient . One more parameter is required to decide output signal amplification for given input signal Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 15

  15. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 16

  16. Determine parameter

  17. Stepwise description of action: Sample image for step 3 1.Show question here Question panel Q.Identify which of the following parameters you need to decide output signal amplification? Q point IB3 β dc hfe Q POINT IB2 IBQ IB1 IB0 2.Show these three options Fig.3 4.Show these fig.3 Feedback box 5. Show this button here Measure IBQ 3.Show feedback here Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 18

  18. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 19

  19. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 20

  20. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 21

  21. Measure IBQ

  22. MeasureIBQ MeasureIBQ MeasureIBQ MeasureIBQ Stepwise description of action: Sample image 1for step 3 CITCUIT DIAGRAM.1 Show Ammeter here CONNECT AMMETER HERE 1 A Feedback SHOW THESE INSTRUCTIONS Drag ammeter in the circuit to measure IBQ Not to show this line red on the screen this is shown RED to explain animator the position Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 23

  23. Stepwise description of action: Sample image 2 for step 3 IBQ=20µA Show Feedback here “IBQ is current measured under only dc conditions or no signal condition. IBQ=20µA Next

  24. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 25

  25. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 26

  26. MeasureIBQ MeasureIBQ MeasureIBQ MeasureIBQ Stepwise description of action: Sample image for step 4 Show values ofIBQ here FIG.A Show radio button s for each IBQ value as shown Show instructions here Click on value of IBQ you have measured” Show feedback here Go back to measure IBQ and try again Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 27

  27. MeasureIBQ MeasureIBQ MeasureIBQ MeasureIBQ Stepwise description of action: Sample image for step 5 Show pop up here Q point is intersection of load line and IBQ characteristics This is correct position of dot ICQ=2mA FIG.B Show values here Show dot here VCEQ=10V Locate Q point Show instructions Show Q point voltage and current values Show feedback here Go back to Determine parameter and try again Relate Q point to output Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 29

  28. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 30

  29. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 31

  30. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 32

  31. Design tips Additional tab in LO Display take away for design Q point is a point of intersection of load line and I BQ characteristics

  32. Relation of Qpoint to amplification of input signal

  33. Stepwise description of action: Sample image 1 for step 6 FIG.A 40 µA 35 µA 4mA 30 µA 25 µA 3mA Collector Current( IC) 20 µA 2mA 15 µA 10 µA 1mA 5 µA Apply Input signal=20mv

  34. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 36

  35. Stepwise description of action: Sample image2 for step 6 Show input signal waveform here 40 µA FIG.A FIG.B 35 µA Show dotted lines here 4mA 30 µA 25 µA 3mA Collector Current( IC) 20 µA 2mA 15 µA 10 µA 1mA 5 µA FIG.A Show output voltage waveform

  36. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 38

  37. Stepwise description of action: Sample image 3 for step 6 40 µA FIG.A FIG.B 35 µA Collector Current( IC) 4mA 30 µA 25 µA 3mA 20 µA 2mA 15 µA Show dotted line for output voltage here 10 µA 1mA 5 µA Show output current waveform here Show dotted line for output current here Show output voltage waveform here

  38. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 40

  39. Project OSCAR IDD Template 4.7 Project OSCAR IDD Template 4.7 41

  40. Display take away for design Location of Q point determines output waveform

  41. Quiz • 1.Given IBQ=25 µA which is a correct Q point? • Ans:-a. point1 , b.point2, c. point3, d.point4 , • e.point2 and3 both are ok 1 3 2 4 Project OSCAR IDD Template 4.7 43 Project OSCAR IDD Template 4.7

  42. Answers: • a. b. c. d. e. • Correct answer: b • Feedback/Justification to be displayed: • If user clicks correct answer then display_ You are right Q point is intersection of load line and IBQ characteristics • If user clicks incorrect answer then display_ look at the part Determine parameter in the LO .

  43. Question 2:IBQ=10 µA then choose correct output voltage 1 2 3 Project OSCAR IDD Template 4.7 45 Project OSCAR IDD Template 4.7

  44. Answers: • 1. 2. 3. • Correct answer: 2. • Feedback/Justification to be displayed: • If user clicks correct answer then display_ You are right Output voltage can be drawn from lines projected from load line and these projection lines are decided by input current swing and its projection on load line • If user clicks incorrect answer then display_ look at the part related to relation of Q point with amplification of input signal .

  45. Question 2:IBQ=10 µA then choose correct output current 3 2 1 Project OSCAR IDD Template 4.7 47 Project OSCAR IDD Template 4.7

  46. Answers: • 1. 2. 3. • Correct answer: 2. • Feedback/Justification to be displayed: • If user clicks correct answer then display_ You are right Output voltage can be drawn from lines projected from load line and these projection lines are decided by input current swing and its projection on load line • If user clicks incorrect answer then display_ look at the part related to relation of Q point with amplification of input signal .Show this arrow • when user clicks arrow it will open slide no34 in LO

  47. Question 2:IBQ=25 µA then choose correct output voltage 1. 2 3 Project OSCAR IDD Template 4.7 49 Project OSCAR IDD Template 4.7

  48. Answers: • 1. 2. 3. • Correct answer: 1 • Feedback/Justification to be displayed: • If user clicks correct answer then display_ You are right Output voltage can be drawn from lines projected from load line and these projection lines are decided by input current swing and its projection on load line • If user clicks incorrect answer then display_ look at the part related to relation of Q point with amplification of input signal .

  49. Question 2:IBQ=25 µA then choose correct output current 2 1 3 Project OSCAR IDD Template 4.7 51 Project OSCAR IDD Template 4.7

More Related