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Digitizing and Sampling Circuits

Digitizing and Sampling Circuits

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This chapter discusses where the world of digital electronics merges with analog electronics in digitizing and sampling circuits, but the merged areas - mainly ADCs, DACs, and switched-capacitor and sampling circuits - do not involve logic design. Instead, the underlying theory is an extension of that for continuous functions. The mathematics is similar; difference equations replace differential equations. Sampled circuits also include commutating and switched-capacitor filters and digital signal processing, but the full story, including dithering, FFTs, DSP filters, and windowing, is left for other books.

Chapter Contents:

  • Electrical Quantities Both Encode and Represent Information
  • Digital-to-Analog Converters
  • DAC Circuits
  • Parallel-Feedback ADCs
  • Integrating ADCs
  • Simple μC-Based Σ-Δ ADCs
  • Voltage-to-Frequency Converters
  • Parallel and Recursive Conversion Techniques
  • Time-Domain Sampling Theory
  • Frequency-Domain Sampling Theory
  • The Sampling Theorem (Nyquist Criterion)
  • Sampling Circuits
  • Switched-Capacitor Circuits
  • Closure

Inspec keywords: digital-analogue conversion; switched capacitor filters; difference equations; analogue-digital conversion

Other keywords: switched capacitor filters; digitizing circuits; analogue-to-digital converters; digital signal processing; difference equations; DSP filters; sampling circuits; digital-to-analogue converters; differential equations

Subjects: Differential equations (numerical analysis); Time varying and switched networks; Differential equations (numerical analysis); Active filters and other active networks; A/D and D/A convertors; A/D and D/A convertors

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