second_adc_dt.mdl

First end second order sigma-delta ADC Simulink model.

      ExternalReset	      "none"
      InitialConditionSource  "internal"
      InitialCondition	      "0"
      InitialConditionMode    "State and output"
      SampleTime	      "1"
      OutDataTypeMode	      "Inherit via internal rule"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      LockScale		      off
      RndMeth		      "Floor"
      SaturateOnIntegerOverflow	off
      LimitOutput	      off
      UpperSaturationLimit    "inf"
      LowerSaturationLimit    "-inf"
      ShowSaturationPort      off
      ShowStatePort	      off
      IgnoreLimit	      off
      StateMustResolveToSignalObject off
      RTWStateStorageClass    "Auto"
    }
    Block {
      BlockType		      Gain
      Gain		      "1"
      Multiplication	      "Element-wise(K.*u)"
      ParameterDataTypeMode   "Same as input"
      ParameterDataType	      "sfix(16)"
      ParameterScalingMode    "Best Precision: Matrix-wise"
      ParameterScaling	      "2^0"
      OutDataTypeMode	      "Same as input"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      LockScale		      off
      RndMeth		      "Floor"
      SaturateOnIntegerOverflow	on
      SampleTime	      "-1"
    }
    Block {
      BlockType		      RateTransition
      Integrity		      on
      Deterministic	      on
      X0		      "0"
      OutPortSampleTime	      "-1"
    }
    Block {
      BlockType		      Scope
      Floating		      off
      ModelBased	      off
      TickLabels	      "OneTimeTick"
      ZoomMode		      "on"
      Grid		      "on"
      TimeRange		      "auto"
      YMin		      "-5"
      YMax		      "5"
      SaveToWorkspace	      off
      SaveName		      "ScopeData"
      LimitDataPoints	      on
      MaxDataPoints	      "5000"
      Decimation	      "1"
      SampleInput	      off
      SampleTime	      "0"
    }
    Block {
      BlockType		      "S-Function"
      FunctionName	      "system"
      SFunctionModules	      "''"
      PortCounts	      "[]"
    }
    Block {
      BlockType		      Signum
      ZeroCross		      on
      SampleTime	      "-1"
    }
    Block {
      BlockType		      Sum
      IconShape		      "rectangular"
      Inputs		      "++"
      InputSameDT	      on
      OutDataTypeMode	      "Same as first input"
      OutDataType	      "sfix(16)"
      OutScaling	      "2^0"
      LockScale		      off
      RndMeth		      "Floor"
      SaturateOnIntegerOverflow	on
      SampleTime	      "-1"
    }
    Block {
      BlockType		      ToWorkspace
      VariableName	      "simulink_output"
      MaxDataPoints	      "1000"
      Decimation	      "1"
      SampleTime	      "0"
      FixptAsFi		      off
    }
  }
  AnnotationDefaults {
    HorizontalAlignment	    "center"
    VerticalAlignment	    "middle"
    ForegroundColor	    "black"
    BackgroundColor	    "white"
    DropShadow		    off
    FontName		    "Courier New"
    FontSize		    10
    FontWeight		    "normal"
    FontAngle		    "normal"
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    FontName		    "Courier New"
    FontSize		    9
    FontWeight		    "normal"
    FontAngle		    "normal"
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    Name		    "second_adc_dt"
    Location		    [168, 150, 1188, 798]
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    ModelBrowserWidth	    200
    ScreenColor		    "white"
    PaperOrientation	    "landscape"
    PaperPositionMode	    "auto"
    PaperType		    "A4"
    PaperUnits		    "centimeters"
    ZoomFactor		    "100"
    ReportName		    "simulink-default.rpt"
    Block {
      BlockType		      DiscreteIntegrator
      Name		      "Discrete-Time\nIntegrator1"
      Ports		      [1, 1]
      Position		      [245, 194, 280, 226]
      IntegratorMethod	      "Integration: Forward Euler"
      ExternalReset	      "none"
      InitialConditionSource  "internal"
      SampleTime	      "ts"
      IgnoreLimit	      off
      ICPrevOutput	      "DiscIntNeverNeededParam"
      ICPrevScaledInput	      "DiscIntNeverNeededParam"
    }
    Block {
      BlockType		      DiscreteIntegrator
      Name		      "Discrete-Time\nIntegrator2"
      Ports		      [1, 1]
      Position		      [410, 194, 445, 226]
      IntegratorMethod	      "Integration: Forward Euler"
      ExternalReset	      "none"
      InitialConditionSource  "internal"
      SampleTime	      "ts"
      IgnoreLimit	      off
      ICPrevOutput	      "DiscIntNeverNeededParam"
      ICPrevScaledInput	      "DiscIntNeverNeededParam"
    }
    Block {
      BlockType		      Reference
      Name		      "FIR\nDecimation"
      Ports		      [1, 1]
      Position		      [650, 184, 715, 236]
      DialogController	      "dspDDGCreate"
      DialogControllerArgs    "DataTag0"
      SourceBlock	      "dspmlti4/FIR\nDecimation"
      SourceType	      "FIR Decimation"
      h			      "b"
      D			      "Ndec"
      framing		      "Maintain input frame size"
      outputBufInitCond	      "0"
      additionalParams	      off
      allowOverrides	      on
      firstCoeffMode	      "Same word length as input"
      firstCoeffWordLength    "16"
      firstCoeffFracLength    "15"
      outputMode	      "Same as accumulator"
      outputWordLength	      "16"
      outputFracLength	      "15"
      accumMode		      "Inherit via internal rule"
      accumWordLength	      "32"
      accumFracLength	      "30"
      prodOutputMode	      "Inherit via internal rule"
      prodOutputWordLength    "32"
      prodOutputFracLength    "30"
      roundingMode	      "Floor"
      overflowMode	      off
      LockScale		      off
    }
    Block {
      BlockType		      Gain
      Name		      "Gain"
      Position		      [200, 195, 225, 225]
      Gain		      "K1"
      ParameterDataTypeMode   "Inherit via internal rule"
      OutDataTypeMode	      "Inherit via internal rule"
      SaturateOnIntegerOverflow	off
    }
    Block {
      BlockType		      Gain
      Name		      "Gain1"
      Position		      [360, 195, 390, 225]
      Gain		      "K2"
      ParameterDataTypeMode   "Inherit via internal rule"
      OutDataTypeMode	      "Inherit via internal rule"
      SaturateOnIntegerOverflow	off
    }
    Block {
      BlockType		      RateTransition
      Name		      "Rate Transition"
      Position		      [570, 189, 610, 231]
    }
    Block {
      BlockType		      Scope
      Name		      "Scope"
      Ports		      [5]
      Position		      [555, 114, 585, 146]
      Location		      [71, 184, 1095, 876]
      Open		      off
      NumInputPorts	      "5"
      List {
	ListType		AxesTitles
	axes1			"%<SignalLabel>"
	axes2			"%<SignalLabel>"
	axes3			"%<SignalLabel>"
	axes4			"%<SignalLabel>"
	axes5			"%<SignalLabel>"
      }
      YMin		      "-5~-5~-5~-5~-5"
      YMax		      "5~5~5~5~5"
      DataFormat	      "StructureWithTime"
      LimitDataPoints	      off
    }
    Block {
      BlockType		      Signum
      Name		      "Sign"
      Position		      [470, 195, 500, 225]
    }
    Block {
      BlockType		      Reference
      Name		      "Sine Wave"
      Ports		      [0, 1]
      Position		      [75, 188, 120, 232]
      SourceBlock	      "dspsrcs4/Sine Wave"
      SourceType	      "Sine Wave"
      Amplitude		      "Amp"
      Frequency		      "ft"
      Phase		      "0"
      SampleMode	      "Discrete"
      OutComplex	      "Real"
      CompMethod	      "Trigonometric fcn"
      TableSize		      "Speed"
      SampleTime	      "ts"
      SamplesPerFrame	      "1"
      additionalParams	      off
      allowOverrides	      on
      dataType		      "double"
      wordLen		      "16"
      udDataType	      "sfix(16)"
      fracBitsMode	      "Best precision"
      numFracBits	      "15"
      ResetState	      "Restart at time zero"
    }
    Block {
      BlockType		      Sum
      Name		      "Sum1"
      Ports		      [2, 1]
      Position		      [320, 200, 340, 220]
      ShowName		      off
      IconShape		      "round"
      Inputs		      "|+-"
      InputSameDT	      off
      OutDataTypeMode	      "Inherit via internal rule"
    }
    Block {
      BlockType		      Sum
      Name		      "Sum4"
      Ports		      [2, 1]
      Position		      [155, 200, 175, 220]
      ShowName		      off
      IconShape		      "round"
      Inputs		      "|+-"
      InputSameDT	      off
      OutDataTypeMode	      "Inherit via internal rule"
    }
    Block {
      BlockType		      ToWorkspace
      Name		      "To Workspace"
      Position		      [610, 285, 670, 315]
      VariableName	      "out"
      MaxDataPoints	      "Inf"
      SampleTime	      "ts"
      SaveFormat	      "Array"
    }
    Block {
      BlockType		      ToWorkspace
      Name		      "To Workspace1"
      Position		      [755, 195, 815, 225]
      VariableName	      "out_f"
      MaxDataPoints	      "Inf"
      SampleTime	      "ts"
      SaveFormat	      "Array"
    }
    Line {
      SrcBlock		      "Sine Wave"
      SrcPort		      1
      Points		      [10, 0]
      Branch {
	DstBlock		"Sum4"
	DstPort			1
      }
      Branch {
	Points			[0, -90]
	DstBlock		"Scope"
	DstPort			1
      }
    }
    Line {
      SrcBlock		      "Sign"
      SrcPort		      1
      Points		      [0, 0; 15, 0]
      Branch {
	Points			[15, 0]
	Branch {
	  Points		  [10, 0]
	  Branch {
	    Points		    [0, 90]
	    DstBlock		    "To Workspace"
	    DstPort		    1
	  }
	  Branch {
	    DstBlock		    "Rate Transition"
	    DstPort		    1
	  }
	}
	Branch {
	  Points		  [0, 55; -205, 0]
	  Branch {
	    Points		    [-165, 0]
	    DstBlock		    "Sum4"
	    DstPort		    2
	  }
	  Branch {
	    DstBlock		    "Sum1"
	    DstPort		    2
	  }
	}
      }
      Branch {
	Points			[0, -75]
	DstBlock		"Scope"
	DstPort			4
      }
    }
    Line {
      SrcBlock		      "Discrete-Time\nIntegrator1"
      SrcPort		      1
      Points		      [15, 0]
      Branch {
	Points			[0, -80]
	DstBlock		"Scope"
	DstPort			3
      }
      Branch {
	DstBlock		"Sum1"
	DstPort			1
      }
    }
    Line {
      SrcBlock		      "Sum4"
      SrcPort		      1
      Points		      [5, 0]
      Branch {
	Points			[0, -85]
	DstBlock		"Scope"
	DstPort			2
      }
      Branch {
	DstBlock		"Gain"
	DstPort			1
      }
    }
    Line {
      SrcBlock		      "FIR\nDecimation"
      SrcPort		      1
      Points		      [0, 0; 10, 0]
      Branch {
	DstBlock		"To Workspace1"
	DstPort			1
      }
      Branch {
	Points			[0, -45; -190, 0]
	DstBlock		"Scope"
	DstPort			5
      }
    }
    Line {
      SrcBlock		      "Rate Transition"
      SrcPort		      1
      DstBlock		      "FIR\nDecimation"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Gain"
      SrcPort		      1
      DstBlock		      "Discrete-Time\nIntegrator1"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Sum1"
      SrcPort		      1
      DstBlock		      "Gain1"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Discrete-Time\nIntegrator2"
      SrcPort		      1
      DstBlock		      "Sign"
      DstPort		      1
    }
    Line {
      SrcBlock		      "Gain1"
      SrcPort		      1
      DstBlock		      "Discrete-Time\nIntegrator2"
      DstPort		      1
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