Circuit Break - A MacroFab Podcast

MEP EP#293: Tom Anderson, the Gold Ear Sympathetic

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MEP EP#293: Tom Anderson, the Gold Ear Sympathetic

Tom Anderson

  • An old-timer engineer working from HP/Agilent/Keysight
  • Currently still employed at Keysight
  • Volunteering at Alembic, where he designs electronics for bass guitars
  • Career includes:
    • Design of firmware
    • Digital
    • Analog
    • Microwave
    • Optical
    • Power supplies
    • Software
    • Information systems

      • Metrology and You

      • Do I need to worry about all of this? (as a hobbyist, is accuracy important?)-
      • Measure with micrometer...
      • Taking Measurements
        • voltage, current, resistance, inductance, capacitance, Q, frequency, time, noise, RF/microwave
        • Measurement Uncertainty
          • +/- 0.1dB specification - what can go wrong?
          • How do you make things more accurate?
            • System engineering - when the boards are put together, does the system work?
            • Testing the idea that multiple resistors are tighter tolerance than single
              • Are the values random?
              • Sources of errors - narrow things down to the path between a sensor and an ADC
                • Temperature
                • Noise, thermal
                • Noise, switching power supply, rectifier diodes
                • Noise, clock, data, address
                • DC shift - where does the ground current flow? Screws, contact resistance, and X-Acto blades.
                • Offset voltage and current
                • Connector Repeatability
                • Temperature
                  • Repeatability/Skid
                  • Controlling temperature (room air, coffee cup, fingers, oven proportional control)

                    •  

                    ...more
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                    Circuit Break - A MacroFab PodcastBy MacroFab, Inc.
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