Scicos Block
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Digital to Analog Convertor block

Contents

• Digital to Analog Convertor block
  • Palette
  • Description
  • Dialog box
  • Default properties
  • Interfacing function
  • Computational function
  • See also
  • Authors

Palette

• NonLinear - NonLinear palette

Description

That block is an ideal Digital To Analog Converter. The regular output is computed with the formula :

$$\begin{eqnarray} y_{k} = u_{k}q_{k} + V_{{\rm min}k} \end{eqnarray}$$

with u the input, q the step and Vmin the minimum value of the output. u is understand as a vector of integer number where the number of bit per integer is defined by the dialog parameter 'Number of bits'. The input numbers can also be described with the 2 complement arithmetic notation.

Dialog box

• Step
  The step of the analog output value.
  Properties : Type 'vec' of size -1.

• Minimun output value
  The minimun analog output value where the convertion begins.
  Properties : Type 'vec' of size -1.

• Number of bits
  The length in bits of the digital input code.
  Properties : Type 'vec' of size -1.

• 2's complement (0:no, 1:yes)
  Unsigned input integer (0) or signed intput integer (1).
  Properties : Type 'vec' of size -1.

• Inherit (no:0, yes:1)
  Herits events by its regular input ports (disable the event input port).
  Properties : Type 'vec' of size -1.

Default properties

• always active: no
• direct-feedthrough: yes
• zero-crossing: no
• mode: no
• regular inputs:
  - port 1 : size [1,1] / type 1
  
• regular outputs:
  - port 1 : size [1,1] / type 1
  
• number/sizes of activation inputs: 0
• number/sizes of activation outputs: 0
• continuous-time state: no
• discrete-time state: no
• object discrete-time state: no
• name of computational function: dac

Interfacing function

• MODNUMCOS/macros/scicos_blocks/NonLinear/DAC_c.sci [view code]

Computational function

• MODNUMCOS/routines/nonlinear/dac.c (Type 4) [view code]

See also

• ADC_c - Analog to Digital Converter block (Scicos Block)

Authors

INRIA Alan Layec