ee3c11 structured electronic design my first voltage
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EE3C11: Structured Electronic Design My First Voltage Ampli fi er - PowerPoint PPT Presentation

EE3C11: Structured Electronic Design My First Voltage Ampli fi er Design example EE3C11 47u 100n + 5 1k OPA211 Unit step response - 20k 120 27 + - 100 1u 3.4n 2.2p 80 47u 20k 600 1k 220 60 + GAIN 47u 40 - 20 0 -20


  1. Design of ampli fi er con fi guration + + + + Voltage transfer independent of source and load impedance. - - - - Ampli fi er concept for establishing a nonzero value for A only Best performance with nonenergic feedback Wide-band transformer expensive + + Passive feedback con fi guration Feedback network increases noise - - and power losses of controller 30 (c) 2020 A.J.M. Montagne

  2. Design of ampli fi er con fi guration + + + + Voltage transfer independent of source and load impedance. - - - - Ampli fi er concept for establishing Nonzero value for A: a nonzero value for A only Best performance with nonenergic feedback Wide-band transformer expensive + + Passive feedback con fi guration Feedback network increases noise - - and power losses of controller 31 (c) 2020 A.J.M. Montagne

  3. Design of ampli fi er con fi guration + + + + Voltage transfer independent of source and load impedance. - - - - Ampli fi er concept for establishing Nonzero value for A: a nonzero value for A only Parallel sensing Best performance with nonenergic feedback Wide-band transformer expensive + + Passive feedback con fi guration Feedback network increases noise - - and power losses of controller 32 (c) 2020 A.J.M. Montagne

  4. Design of ampli fi er con fi guration + + + + Voltage transfer independent of source and load impedance. - - - - Ampli fi er concept for establishing Nonzero value for A: a nonzero value for A only Parallel sensing Best performance with nonenergic Zero output impedance feedback Wide-band transformer expensive + + Passive feedback con fi guration Feedback network increases noise - - and power losses of controller 33 (c) 2020 A.J.M. Montagne

  5. Design of ampli fi er con fi guration + + + + Voltage transfer independent of source and load impedance. - - - - Ampli fi er concept for establishing Nonzero value for A: a nonzero value for A only Parallel sensing Best performance with nonenergic Zero output impedance feedback Series comparison Wide-band transformer expensive + + Passive feedback con fi guration Feedback network increases noise - - and power losses of controller 34 (c) 2020 A.J.M. Montagne

  6. Design of ampli fi er con fi guration + + + + Voltage transfer independent of source and load impedance. - - - - Ampli fi er concept for establishing Nonzero value for A: a nonzero value for A only Parallel sensing Best performance with nonenergic Zero output impedance feedback Series comparison Wide-band transformer expensive In fi nite input impedance + + Passive feedback con fi guration Feedback network increases noise - - and power losses of controller 35 (c) 2020 A.J.M. Montagne

  7. Design of ampli fi er con fi guration + + + + Voltage transfer independent of source and load impedance. - - - - Ampli fi er concept for establishing Nonzero value for A: a nonzero value for A only Parallel sensing Best performance with nonenergic Zero output impedance feedback Series comparison Wide-band transformer expensive In fi nite input impedance + + Passive feedback con fi guration Feedback network increases noise - - and power losses of controller 36 (c) 2020 A.J.M. Montagne

  8. Noise design 37 (c) 2020 A.J.M. Montagne

  9. Noise design Find and solve design equations for elements that contribute to the noise 38 (c) 2020 A.J.M. Montagne

  10. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 39 (c) 2020 A.J.M. Montagne

  11. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources 40 (c) 2020 A.J.M. Montagne

  12. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: 41 (c) 2020 A.J.M. Montagne

  13. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - + + - 42 (c) 2020 A.J.M. Montagne

  14. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - + + - 43 (c) 2020 A.J.M. Montagne

  15. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - Noise fi gure of 3dB: + + - 44 (c) 2020 A.J.M. Montagne

  16. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - Noise fi gure of 3dB: + + - 45 (c) 2020 A.J.M. Montagne

  17. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - Noise fi gure of 3dB: + + Show stopper values: - 46 (c) 2020 A.J.M. Montagne

  18. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - Noise fi gure of 3dB: + + Show stopper values: - 47 (c) 2020 A.J.M. Montagne

  19. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - Noise fi gure of 3dB: + + Show stopper values: - 48 (c) 2020 A.J.M. Montagne

  20. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - Noise fi gure of 3dB: + + Show stopper values: - 49 (c) 2020 A.J.M. Montagne

  21. Noise design Find and solve design equations for elements that contribute to the noise 1. Feedback resistors 2. Controller equivalent intput noise sources Noise model: - Noise fi gure of 3dB: + + Show stopper values: - 50 (c) 2020 A.J.M. Montagne

  22. Voltage and current drive capability 51 (c) 2020 A.J.M. Montagne

  23. Voltage and current drive capability Load drive requirements 52 (c) 2020 A.J.M. Montagne

  24. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp 53 (c) 2020 A.J.M. Montagne

  25. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us 54 (c) 2020 A.J.M. Montagne

  26. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA 55 (c) 2020 A.J.M. Montagne

  27. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V 56 (c) 2020 A.J.M. Montagne

  28. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements 57 (c) 2020 A.J.M. Montagne

  29. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements Supply voltage: 5V 58 (c) 2020 A.J.M. Montagne

  30. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements Supply voltage: 5V No power consumption requirements 59 (c) 2020 A.J.M. Montagne

  31. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements Supply voltage: 5V No power consumption requirements Biasing errors take a part of the budget for the total voltage drop 60 (c) 2020 A.J.M. Montagne

  32. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements Supply voltage: 5V No power consumption requirements Biasing errors take a part of the budget for the total voltage drop Biasing concept with AC coupling 61 (c) 2020 A.J.M. Montagne

  33. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements Supply voltage: 5V No power consumption requirements Biasing errors take a part of the budget for the total voltage drop Biasing concept with AC coupling As presented in Chapter 9 62 (c) 2020 A.J.M. Montagne

  34. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements Supply voltage: 5V No power consumption requirements Biasing errors take a part of the budget for the total voltage drop Biasing concept with AC coupling As presented in Chapter 9 OpAmp requirements 63 (c) 2020 A.J.M. Montagne

  35. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements + Sourcing output saturation Minimum CM input to positive supply Supply voltage: 5V - No power consumption requirements { + Biasing errors take a part of the - + - CM input voltage budget for the total voltage drop range Minimum CM input to negative supply Sinking output saturation Biasing concept with AC coupling As presented in Chapter 9 OpAmp requirements 64 (c) 2020 A.J.M. Montagne

  36. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements + Sourcing output saturation Minimum CM input to positive supply Supply voltage: 5V - No power consumption requirements { + Biasing errors take a part of the - + - CM input voltage budget for the total voltage drop range Minimum CM input to negative supply Sinking output saturation Biasing concept with AC coupling As presented in Chapter 9 OpAmp requirements Supply voltage: 5V 65 (c) 2020 A.J.M. Montagne

  37. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements + Sourcing output saturation Minimum CM input to positive supply Supply voltage: 5V - No power consumption requirements { + Biasing errors take a part of the - + - CM input voltage budget for the total voltage drop range Minimum CM input to negative supply Sinking output saturation Biasing concept with AC coupling As presented in Chapter 9 OpAmp requirements Supply voltage: 5V Current drive capability: > 4.8mA + current through feedback network 66 (c) 2020 A.J.M. Montagne

  38. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements + Sourcing output saturation Minimum CM input to positive supply Supply voltage: 5V - No power consumption requirements { + Biasing errors take a part of the - + - CM input voltage budget for the total voltage drop range Minimum CM input to negative supply Sinking output saturation Biasing concept with AC coupling As presented in Chapter 9 OpAmp requirements Supply voltage: 5V Current drive capability: > 4.8mA + current through feedback network Output saturation source/sink: < 0.25V - total output biasing error voltage 67 (c) 2020 A.J.M. Montagne

  39. Voltage and current drive capability Load drive requirements Load signal voltage: 4.5V pp Maximum rate of change @ 100kHz sine wave, 4.5V pp : 1.41 V/us Maximum load current @ 100kHz sine wave, 4.5Vpp, 3.4nF: 4.8mA Quiescent output voltage: 2.5V Supply requirements + Sourcing output saturation Minimum CM input to positive supply Supply voltage: 5V - No power consumption requirements { + Biasing errors take a part of the - + - CM input voltage budget for the total voltage drop range Minimum CM input to negative supply Sinking output saturation Biasing concept with AC coupling As presented in Chapter 9 OpAmp requirements Supply voltage: 5V Current drive capability: > 4.8mA + current through feedback network Output saturation source/sink: < 0.25V - total output biasing error voltage 68 (c) 2020 A.J.M. Montagne

  40. Biasing errors 69 (c) 2020 A.J.M. Montagne

  41. Biasing errors + - + - + - 70 (c) 2020 A.J.M. Montagne

  42. Biasing errors Contributions to biasing errors: + - + - + - 71 (c) 2020 A.J.M. Montagne

  43. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - + - + - 72 (c) 2020 A.J.M. Montagne

  44. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - + - 73 (c) 2020 A.J.M. Montagne

  45. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - + - 74 (c) 2020 A.J.M. Montagne

  46. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - O ff set current OpAmp - + - 75 (c) 2020 A.J.M. Montagne

  47. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - O ff set current OpAmp - - O ff set voltage OpAmp + - 76 (c) 2020 A.J.M. Montagne

  48. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - O ff set current OpAmp - - O ff set voltage OpAmp Interaction with other performance aspects: + - 77 (c) 2020 A.J.M. Montagne

  49. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - O ff set current OpAmp - - O ff set voltage OpAmp Interaction with other performance aspects: - Noise: + - 78 (c) 2020 A.J.M. Montagne

  50. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - O ff set current OpAmp - - O ff set voltage OpAmp Interaction with other performance aspects: - Noise: + - Bandwidth: - 79 (c) 2020 A.J.M. Montagne

  51. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - O ff set current OpAmp - - O ff set voltage OpAmp Interaction with other performance aspects: - Noise: + - Bandwidth: - Accuracy: - 80 (c) 2020 A.J.M. Montagne

  52. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - O ff set current OpAmp - - O ff set voltage OpAmp Interaction with other performance aspects: - Noise: + - Bandwidth: - Accuracy: - - PSRR: 81 (c) 2020 A.J.M. Montagne

  53. Biasing errors Contributions to biasing errors: + - Supply voltage tolerance - - Resistor tolerances + - Bias current OpAmp - O ff set current OpAmp - - O ff set voltage OpAmp Interaction with other performance aspects: - Noise: + - Bandwidth: - Accuracy: - - PSRR: 82 (c) 2020 A.J.M. Montagne

  54. Biasing errors X1 O_dcVar (1) R2 R3 + (2) R4 (3) - (out) (4) R1 V1 83 (c) 2020 A.J.M. Montagne

  55. Biasing errors X1 Simpli fi ed result: O_dcVar (1) R2 R3 + (2) R4 (3) - (out) (4) R1 V1 84 (c) 2020 A.J.M. Montagne

  56. Biasing errors X1 Simpli fi ed result: O_dcVar (1) R2 R3 + (2) R4 (3) - (out) (4) R1 V1 85 (c) 2020 A.J.M. Montagne

  57. Biasing errors X1 Simpli fi ed result: O_dcVar (1) R2 R3 + (2) R4 (3) - (out) (4) R1 V1 86 (c) 2020 A.J.M. Montagne

  58. Bandwidth design 87 (c) 2020 A.J.M. Montagne

  59. Bandwidth design Determination of the required GB product of the OpAmp 88 (c) 2020 A.J.M. Montagne

  60. Bandwidth design Determination of the required GB product of the OpAmp Use the simplest model that provides this information: 89 (c) 2020 A.J.M. Montagne

  61. Bandwidth design Determination of the required GB product of the OpAmp Use the simplest model that provides this information: + - 90 (c) 2020 A.J.M. Montagne

  62. Bandwidth design Determination of the required GB product of the OpAmp Use the simplest model that provides this information: + + + - - - 91 (c) 2020 A.J.M. Montagne

  63. Bandwidth design Determination of the required GB product of the OpAmp Use the simplest model that provides this information: + + + - - - 92 (c) 2020 A.J.M. Montagne

  64. Bandwidth design 93 (c) 2020 A.J.M. Montagne

  65. Bandwidth design Evaluation of loop gain-poles product 94 (c) 2020 A.J.M. Montagne

  66. Bandwidth design Evaluation of loop gain-poles product + + + - - - + - 95 (c) 2020 A.J.M. Montagne

  67. Bandwidth design Evaluation of loop gain-poles product + + + - - - + - 96 (c) 2020 A.J.M. Montagne

  68. Bandwidth design Evaluation of loop gain-poles product + + + - - - + - 97 (c) 2020 A.J.M. Montagne

  69. Bandwidth design Evaluation of loop gain-poles product + + + - - - Achievable bandwidth B equals LP product: + - 98 (c) 2020 A.J.M. Montagne

  70. Bandwidth design Evaluation of loop gain-poles product + + + - - - Achievable bandwidth B equals LP product: + - 99 (c) 2020 A.J.M. Montagne

  71. Bandwidth design Evaluation of loop gain-poles product + + + - - - Achievable bandwidth B equals LP product: + - 100 (c) 2020 A.J.M. Montagne

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