RE: analog_expression and analog_operator

Dave,

Can we have white_noise()*white_noise()?
What does-it mean physically?

Thanks,

Laurent Lemaitre
Freescale - Genève

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[ ] Freescale Internal Use Only 
[ ] Freescale Confidential Proprietary 


> -----Original Message-----
> From: Dave Miller [mailto:David.L.Miller@freescale.com] 
> Sent: Tuesday, September 26, 2006 4:07 PM
> To: Lemaitre Laurent-r29173
> Cc: verilog-ams@eda.org
> Subject: Re: analog_expression and analog_operator
> 
> 
> Hi Laurent,
> No I don't believe this is the case, the BNF is not expressed 
> correctly 
> in 2.2 for this situation. Ideally you can use an analog opertor 
> anywhere within an analog block as long as it is evaluated at each 
> iteration of a time point (so you can't use them in 
> conditional code). 
> In 2.2 the BNF should include a rule for:
> | analog_expression binary_operator analog_expression
> 
> In the latest draft that is being worked on, the BNF has been 
> corrected 
> to include this rule. In fact the BNF in the latest draft is greatly 
> improved and addresses lots of ambiguities such as this.
> 
> Cheers...
> Dave
> 
> Lemaitre Laurent-r29173 wrote:
> >
> > Hi,
> >
> > I was looking at the LRM 2.2. I observed that analog_expression is
> > BNF-defined as:
> > analog_expression ::= expression | analog_operator(..) | 
> > analog_system_function(..)
> >
> > Then analog_expression is just used in analog_procedural_assignment,
> > analog_indirect_branch_assignment
> > and analog_branch_contribution.
> >
> > Does-it mean that the following code is not LRM 2.2 valid?
> >   I(p,q)<+mycurrent+white_noise(mynoise);
> >
> > (the RHS uses analog_operator inside expression).
> >
> > Thanks,
> >
> > Laurent Lemaitre
> > Freescale - Genève
> >
> > [X] General Business Information
> > [ ] Freescale Internal Use Only
> > [ ] Freescale Confidential Proprietary
> >
> 
> 
> -- 
> =====================================
> -- David Miller
> -- Design Technology (Austin)
> -- Freescale Semiconductor
> -- Ph : 512 996-7377 Fax: x7755 =====================================
> 
>