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Intro to high fidelity measurement

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  • We missed 2/3 of the characteristics!
  • The load step from the national semiconductor datasheet compared with our measurement. Despite being 40 yrs old, this part has a 5MHz bandwidth. The ringing isn’t really that bad, is it? Note the datasheet rise time is typical of electronic loads
  • Say that dashed line is the -37dBm signal level trace. Low frequency noise
  • Say that dashed line is the -37dBm signal level trace. Low frequency noise
  • Say that dashed line is the -37dBm signal level trace. Low frequency noise
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    1. 1. High Fidelity Measurement<br /><ul><li>Bode
    2. 2. Output Impedance
    3. 3. Filter Stability
    4. 4. Step Load
    5. 5. Extracted Phase Margin
    6. 6. PSRR
    7. 7. Crosstalk
    8. 8. Reverse Transfer
    9. 9. Components with DC Bias</li></ul>Copyright © 2011<br />Picotest.com<br />All Rights Reserved<br />
    10. 10. Why we NEED to make the measurements<br />Copyright © 2011 Picotest.com<br />All Rights Reserved<br />Many performance characteristics are severely degraded by poor phase margin<br />
    11. 11. Copyright © 2011 Picotest.com<br />All Rights Reserved<br />Complete Characteristics of Voltage Regulator<br />Voltage Regulation<br />PSRR<br />Crosstalk<br />Ripple &<br />Noise<br />Filter Stability<br />DUT<br />Step Load<br />Dropout<br />Input Z<br />Stability<br />Output <br />Z<br />Reverse<br />Transfer<br />Tempco<br />
    12. 12. Time Domain vs. Frequency Domain<br />Time Domain<br />Freq Domain<br /><ul><li>Gain/Phase Stability
    13. 13. PSRR
    14. 14. Crosstalk
    15. 15. Reverse transfer
    16. 16. Filter Attenuation (i.e. EMI)
    17. 17. Components (impedance and Q)
    18. 18. 1uV-2uV sensitivity
    19. 19. Ripple and Noise / Jitter
    20. 20. Step Load Response
    21. 21. Turn-On, Softstart
    22. 22. Fault Recovery
    23. 23. Sequencing
    24. 24. Glitch search
    25. 25. Poor Sensitivity 10mV-20mV
    26. 26. Output Impedance</li></ul>Copyright © 2011 Picotest.com<br />All Rights Reserved<br />
    27. 27. Picotest J2100 Series Injectors<br /><ul><li>J2100A 1Hz-5MHz Injection Transformer
    28. 28. J2101A 10Hz-45MHz Injection Transformer
    29. 29. J2110A DC-50MHz Voltage Injector
    30. 30. J2111A DC-40MHz Current Injector
    31. 31. J2120A Line Injector
    32. 32. J2130A DC Bias Injector
    33. 33. J2140A Cascadable Attenuators</li></ul>Copyright © 2011 Picotest.com<br />All Rights Reserved<br />
    34. 34. OMICRON-Labs Bode 100<br /><ul><li>All in one:
    35. 35. Vector Network Analyzer
    36. 36. Impedance Analyzer
    37. 37. Gain Phase Meter
    38. 38. Sine wave Generator
    39. 39. Frequency range:
    40. 40. 1 Hz – 40 MHz</li></ul>Copyright © 2010 Picotest.com<br />All Rights Reserved<br />
    41. 41. J2100A and J2101A Transformers Traditional Bode Plots - Stability<br />J2100A<br />J2101A<br /><ul><li>23 Octave Ultra wideband Transformers
    42. 42. Specially annealed amorphous crystal core</li></ul> for outstanding low frequency performance <br />Copyright © 2010 Picotest.com<br />All Rights Reserved<br />
    43. 43. J2110A Solid State Voltage Injector<br />Non-mixing input for Audio testing!<br />=<br /><ul><li>DC-40MHz
    44. 44. Opamp Testing
    45. 45. Audio Testing
    46. 46. Very low distortion</li></ul>J21110A Solid Stage Voltage Injector Traditional Phase Margin<br />Copyright © 2011 Picotest.com<br />All Rights Reserved<br />
    47. 47. J2110A vs. J2100A vs. BWIT<br /><ul><li>Lower Noise
    48. 48. Wider Bandwidth
    49. 49. Bode Plots</li></ul>Picotest J2110A<br />Picotest J2100A<br />Omicron Lab Bwit<br />Copyright © 2011 Picotest.com<br />All Rights Reserved<br />Confidential and Proprietary<br />
    50. 50. J2111A Phase Margin ExtractionNon-Invasive Approach<br />Phase Margin without access to the control loop<br />Middlebrook Filter Stability<br />Copyright © 2010 Picotest.com<br />All Rights Reserved<br />Confidential and Proprietary<br />
    51. 51. <ul><li>High Fidelity Bilateral Injector</li></ul>J2111A Impedance/Step LoadSolid Stage Current Injector<br />20nSec Edge Speed<br />Copyright © 2010 Picotest.com<br />All Rights Reserved<br />Confidential and Proprietary<br />
    52. 52. J2111A Step Load Comparison<br />Step Load Transients<br />High Resolution<br />Low Resolution<br />Copyright © 2010 Picotest.com<br />All Rights Reserved<br />
    53. 53. J2120A Line/PSRR Injector<br />Copyright © 2011 Picotest.com<br />All Rights Reserved<br />Ultra High PSRR Regulator Measurement and Noise Floor <br />
    54. 54. J2140A Cascadable Attenuators<br />The #1 issue with Network Analyzer measurements is that the oscillator signal is too large!<br />3.3V 50mA Voltage Regulator Bode<br />-37dBm and -20dBm injection<br />-37dBm and -30dBm injection<br />See recent article at<br />www.picotest.com<br />“Why Network Analyzer Signal Levels Affect Measurement Results”<br />Copyright © 2011Picotest.com<br />All Rights Reserved<br />BODE 100 Shaped Level tames noise<br />KEEP SIGNALS SMALL!!<br />J2140A Cascadable Attenuator<br />Is often required for Bode plot <br />
    55. 55. <ul><li>Parameter extraction for Semiconductors
    56. 56. DC Blocking
    57. 57. Measure X5R capacitor vs. DC Bias
    58. 58. Measure Varactors</li></ul>J2130A DC Bias Injector<br />Copyright © 2011 Picotest.com<br />All Rights Reserved<br />
    59. 59. Application Notes<br />Copyright © 2011 Picotest.com<br />All Rights Reserved<br />https://www.picotest.com/blog<br />Application Notes for<br /><ul><li>Optocouplers
    60. 60. References
    61. 61. Regulators
    62. 62. Battery Impedance
    63. 63. Diodes
    64. 64. Non-invasive stability
    65. 65. Reverse Transfer
    66. 66. Output Impedance
    67. 67. PSRR
    68. 68. Crosstalk
    69. 69. ESL
    70. 70. Measuring Regulator Noise
    71. 71. Mosfet</li></ul>…And MORE<br />
    72. 72. VRTS Test Standard<br />Copyright © 2011 Picotest.com<br />All Rights Reserved<br /><ul><li>Step-by-Step
    73. 73. Measurement-by-Measurement
    74. 74. Hands on learning
    75. 75. Establishes a Test standard for voltage regulator testing</li>

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