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Dynamic Approaches to Mixed-Signal Design - Sozopol 2009

Explore innovative circuit design methods from Sozopol 2009 conference focusing on power, speed, accuracy, and noise considerations. Dive into Schmitt trigger synthesis, noise immunity, & high-speed data acquisition system design concepts.

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Dynamic Approaches to Mixed-Signal Design - Sozopol 2009

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  1. Sozopol,2009 Dynamic Approaches to Mixed – Signal DesignAngel Nikolaev Popov

  2. POWER SPEED DIE I/O PINS ACCURACY NOISE Sozopol,2009 Introduction “It is important to design circuits with both a circuits and a systems perspective in mind” Jan Rabaey “Everything should be made as simple as possible – but no simpler” Einstein

  3. POWER SPEED DIE I/O PINS ACCURACY NOISE Sozopol,2009 Noise Immunity – Dynamic Hysteresis “The best way to have a good idea is to have a lot of ideas”, Linus Pauling The Schmitt Trigger, as defined by its inventor: A bistable positive feedback circuit, realizable with vacuum tubes or even fluidic components, but now usually solid-state electronics, which features a selected or adjustable hysteresis band separating initiation of "on" and "off" or "1" and "0" (1934)

  4. Sozopol,2009 • Getting the idea

  5. Sozopol,2009 Inverting Schmitt trigger and its signals

  6. Sozopol,2009 Synthesis of a Schmitt trigger with dynamic hysteresis

  7. Sozopol,2009 • Circuit based on two OpAmps Circuit based on two OpAmps

  8. Sozopol,2009 C. CMOS circuits CMOS Schmitt trigger proposed in [21-W. Sansen] and its symmetric version

  9. Sozopol,2009 CMOS Schmitt trigger

  10. Sozopol,2009 Simulated waveforms showing the behavior of a comparator with noise immunity of 1V when theamplitude of the noise is bigger than 1V Simulated waveforms showing the behavior of a comparator with noise immunity of 1V when the amplitude of the noise is less than 1V

  11. Sozopol,2009 Experimental result demonstrating the expected one threshold behavior

  12. Sozopol,2009 D .BJT circuit ST circuit with a capacitor inserted in the PF loop

  13. BJT comparator

  14. Sozopol,2009 Waveforms demonstrating the operation of the BJT comparator

  15. Sozopol,2009 E. Aapplication – Analog-to-Digital Converter Design CMOS inverter used as comparator Parallel resistorless ADC

  16. Sozopol,2009 E1. Threshold Voltage Determination Inverter threshold voltage VTHI as a function of transistor area ratio k

  17. Sozopol,2009 E2. Transfer characteristics Threshold voltage grid for a 3-bit ADC with an inverter and a dynamic hysteresis Schmitt trigger Threshold voltage grid for a 3-bit ADC with two cascaded inverters

  18. Sozopol,2009 E3. Dynamic behavior ADC delays in thermometer code as a function of k for an inverter booster (dashed) and .a Schmitt trigger booster (solid)

  19. TOWARDS SYSTEM-ON-A-CHIP DESIGNOF HIGH-SPEED DATA ACQUISITION SYSTEMS Angel Popov Technical Universityof Sofia e-mail: anp@tu-sofia.acad.bg “The principal applications of any sufficiently new and innovative technology always have been and will continue to be applications created by that new technology” “The Futility of Predicting Applications” Herbert Kroemer, 2000 Nobel laureate …In other words, if we are going to makesomething truly new, we won’t know what to do with it until after we’ve brought it into being…

  20. POWER SPEED DIE I/O PINS ACCURACY NOISE Sozopol,2009 Power Consumption – Current Mode Switching “A good scientist is a person with original ideas. A good engineer is a person who makes a design that works as few original ideas as possible” J. Poole

  21. Sozopol,2009 A. Classic Emitter-Coupled Multivibrator

  22. Sozopol,2009 C. Frequency control Frequency control by switching current IFC

  23. Sozopol,2009 D. VCO/CCO schematics

  24. Sozopol,2009 Voltage control of the CCO

  25. Sozopol,2009 AN ECL CIRCUIT WITH SYMMETRICAL CAPACITANCE-COUPLED ACTIVE PULL-DOWN EMITTER FOLLOWER STAGES

  26. POWER SPEED DIE I/O PINS ACCURACY NOISE Sozopol,2009 Accuracy – Precise Divide-by-Two “A design is what the designer has when time and money run out” J. Poole

  27. Sozopol,2009 A. Two-capacitor DAC background

  28. Sozopol,2009 B. Implementation of precise division by two Proposed schematics for precise division by two

  29. Sozopol,2009 C. RESULTS

  30. Sozopol,2009 CONCLUSIONS ”There’s Plenty of Room at the Bottom” R. Feynman A look into the future should prove the sentence: The most “foolish” ideas at the highest level need respective support from the bottom level.

  31. Thank you for your attention!

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