# MODELING AND SIMULATION FOR RF SYSTEM DESIGN

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78 Chapter
6
Examples
I
V
P1
P2
I1
I2
T2
T1
V12
OUTP
VIN
P
N
IOUT
-- general form
quantity V across I through P1 to P2;
-- two parallel branches
quantity V12 across I1, I2 through T1 to T2;
-- branch ended with reference node
quantity VOUT across IOUT through OUTP;
-- open branch (branch current equal 0.0)
quantity VIN across P to N;
Figure 6-16.
Branch quantity declarations (branch diagrams)
6.3.3
Simultaneous statements and free quantity declarations
Simultaneous statements express explicit and implicit differential and
algebraic equations that constrain the values of the quantities of a model. In
the case of conservative systems they describe the constitutive relations of
network branches. The simultaneous statements must be placed in the
architecture body as well as the concurrent statements. The order of
simultaneous and concurrent statements does not matter.
General form:
[context_clause]
architecture architecture_name of entity_name is
{declaration_part}
begin
{simultaneous_statement |
concurrent_statement}
end [architecture] [architecture_name];
description of the behavior,
constitutive relations, ...
declaration of internal
terminals, branch
quantities, ...
Figure 6-17.
Simultaneous statements in an architecture

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Summary :

## Branch quantity declarations (branch diagrams) 6.3.3 Simultaneous statements and free quantity declarations Simultaneous statements express explicit and implicit differential and algebraic equations that constrain the values of the quantities of a model.

Tags : quantity,statements,branch,simultaneous,across,architecture,through,outp,relations,declarations,iout,figure,branches
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