CHARGEPUMP

Scicos Block
fr - eng

Charge Pump block

$\epsfig{file=CHARGEPUMP_f.eps,height=90pt}$

Charge Pump block

Description

This block realizes the function of an ideal discrete charge pump.

$\begin{figure}\centering \scalebox{0.7}{% \input{chargepump.pstex_t}} \end{figure}$

Figure 1: Ideal charge pump circuit

The two regular inputs are boolean (0 or 1) vectors of commands of the two current sources.
That block computes the following regular outputs :

$\begin{eqnarray} i_{\rm cp}(k)&=&\left[{\rm up}(k)+{\rm down}(k)\right]*I_{\rm o}+I_{\rm leak} \end{eqnarray}$

where $i_{\rm cp}(k)$ is the charge pump output current,
${\rm up}(k)$ and ${\rm down}(k)$ are the logical levels of charge pump inputs,
$I_{\rm o}$ the constant output current and $I_{\rm leak}$ a constant leakage current.

Dialog box

$\begin{figure}\begin{center} \epsfig{file=CHARGEPUMP_f_gui.eps,width=340pt} \end{center}\end{figure}$

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.
Inherit (no:0, yes:1)
Herits events by its regular input ports (disable the event input port).
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
- port 2 : 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: pompecharge

Interfacing function

MODNUMCOS/macros/scicos_blocks/Pll/CHARGEPUMP_f.sci [view code]

Computational function

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

Authors

A. Layec