Scicos Block
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Phase/Frequency tristate Detector block

Contents

• Phase/Frequency tristate Detector block
  • Palette
  • Description
  • Basic blocks equivalent model
  • Dialog box
  • Default properties
  • Interfacing function
  • Computational function
  • See also
  • Authors
  • Bibliography

Palette

• Pll - Phase Locked Loop palette

Description

That block concatenate a CPF block and a charge pump block.

Basic blocks equivalent model

Dialog box

• Lenght of anti-backlash pulse (0:No pulse/Length of pulse [s])
  The duration of the delay for the Return At Zero of the output states of the flip-flops. Set it 0 to disable event output port and third event input port.
  Type 'vec' of size -1.

• Output current [A]
  The maximum output current of the charge pump.
  Type 'vec' of size -1.

• Mean of Leakage current [A] (0:No constant leakage)
  The mean of the noisy current or the constant leakage current.
  Type 'vec' of size -1.

• Variance of leakage current [A] (0:No variance)
  The variance of the noisy current.
  Type 'vec' of size -1.

Default properties

• always active: no
• direct-feedthrough: no
• zero-crossing: no
• mode: no
• regular outputs:
  - port 1 : size [1,1] / type 1
  
• number/sizes of activation inputs: 2
• number/sizes of activation outputs: 0
• continuous-time state: no
• discrete-time state: yes
• object discrete-time state: no
• name of computational function: pfd

Interfacing function

• MODNUMCOS/macros/scicos_blocks/Pll/PFD_f.sci [view code]

Computational function

• MODNUMCOS/routines/pll/pfd.c (Type 4) [view code]

See also

• CPF_f - Tri-state Phase/Frequency Comparator block (Scicos Block)
• CHARGEPUMP_f - Charge Pump block (Scicos Block)

Authors

IRCOM Group Alan Layec

Bibliography

1

D. R. McMahill and C. G. Sodini, ``Automatic calibration of modulated frequency synthesizers,'' IEEE Trans. Circuits Syst. II, vol. 49, no. 5, pp. 301-311, May 2002.