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Meeting w10 chapter 3 part 3

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Hattori Sidek
Hattori Sidek

The document discusses digital control system data distribution and components. It describes how a demultiplexer separates digital controller output into channels connected to DACs to produce analog signals. It also explains how an 8-bit DAC works by converting a digital input to an analog output voltage proportional to the reference voltage. The digital controller uses ADCs and DACs to interface with analog systems and executes control algorithms to regulate processes.

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Chapter 3 Digital Control System ,[object Object],[object Object],[object Object]
Demultiplexer ,[object Object],[object Object],[object Object]
Digital-to-analog converter (DAC) ,[object Object],[object Object],[object Object]
8 bit DAC ,[object Object],8-bit DAC block diagram
Cont. ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Equation to remember: ,[object Object],[object Object],[object Object]
Example 1 ,[object Object],[object Object]
Example 2 ,[object Object],[object Object],[object Object]
Example 3 ,[object Object],[object Object]
DAC method ,[object Object],[object Object],[object Object],[object Object]
Weighted resistors Schematic diagram of a DAC using weighted resistors
Operation: ,[object Object],[object Object],[object Object]
Question? ,[object Object],[object Object],[object Object]
R-2R ladder circuit n-Bit DAC using an R-2R Ladder Circuit
Operation: ,[object Object],[object Object]
Hold ,[object Object],[object Object],[object Object]
Cont. ,[object Object],Hold Sample Sample Output from a zero-order hold
Cont. ,[object Object],[object Object]
6. Digital controller ,[object Object],[object Object],[object Object],[object Object]
Cont. ,[object Object],Structure of a digital controller
Cont. ,[object Object],[object Object],Digital controller in a closed loop
Cont. ,[object Object],[object Object],Digital control loop configuration
Cont. ,[object Object],[object Object],[object Object]
Ideal sampling ,[object Object],Analog signal (band limited) t x(t) X(f) B -B A Sampling function t i(t) t s (1) (1) ... ... Ideally sampled signal t x I (t) t s S 2S -S ... (S) ... f (S) I(f) Spectra ... S 2S -S ... ft X I (f) -B B AS F F F
Cont. ,[object Object],[object Object],[object Object]
Shannon sampling theorem ,[object Object],[object Object],[object Object]
Cont. ,[object Object],[object Object],[object Object]
Cont. ... S -S ... f X I (f) -B B oversampling S > 2B ... S -S ... f X I (f) -B B critical sampling S = 2B ... S -S ... f X I (f) -B B undersampling S < 2B Possibilities for Spectrum of a Sampled Signal
Cont. ,[object Object],[object Object]
Example of digital control system Example of digital control system
System description: ,[object Object],[object Object],[object Object]
Cont. ,[object Object],[object Object]
System operation: ,[object Object],[object Object],[object Object],[object Object],[object Object]

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Meeting w10 chapter 3 part 3

  • 1.
  • 2.
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  • 5.
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  • 7.
  • 8.
  • 9.
  • 10.
  • 11. Weighted resistors Schematic diagram of a DAC using weighted resistors
  • 12.
  • 13.
  • 14. R-2R ladder circuit n-Bit DAC using an R-2R Ladder Circuit
  • 15.
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  • 17.
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  • 22.
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  • 24.
  • 25.
  • 26.
  • 27.
  • 28. Cont. ... S -S ... f X I (f) -B B oversampling S > 2B ... S -S ... f X I (f) -B B critical sampling S = 2B ... S -S ... f X I (f) -B B undersampling S < 2B Possibilities for Spectrum of a Sampled Signal
  • 29.
  • 30. Example of digital control system Example of digital control system
  • 31.
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  • 33.