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AN3984 датащи(PDF) 41 Page - STMicroelectronics

номер детали AN3984
подробное описание детали  The purpose of this document is to provide a tool to calculate
PDF  46 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN3984 датащи(HTML) 41 Page - STMicroelectronics

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AN3984
Matlab code (functions)
Doc ID 022240 Rev 1
41/46
A.10
Display coefficient and error messages (Display_Coeff.m)
%-------------------------------------------------------------------------%
%
function []=Display_Coeff(Filter_Coeff, CoeffAPW, LimitValue)
%
Args:Filter_Coeff -> APW filter Coeff
- Hex
%
CoeffAPW -> APW filter Coeff
- Floating
%
LimitVal -> Limit coeff value
%
Return: Display -> APW filter Coeff
- Hex
%
%
Description: Display Filter Coefficient (HEX)
%
%
STMicroelectronics - Agrate (ITALY)
%
MSH - Audio & Sound BU
%
Revision: 1.1
%
Date: 23 june 2011
%-------------------------------------------------------------------------%
function
[]=Display_Coeff(Filter_Coeff, CoeffAPW, LimitValue)
a0 = 1;
a1 =-2*CoeffAPW(3);
a2 = -CoeffAPW(4);
b0 =2*CoeffAPW(5);
b1 =2*CoeffAPW(1);
b2 = CoeffAPW(2);
Coeff = [b0 b1 b2 a0 a1 a2];
%% Check for stability and Limit
Error = 0;
if ((abs(b0)>=LimitValue) || (abs(b1)>=LimitValue)|| (abs(b2)>=LimitValue))
Error = 1;
end
if abs(a2)>1 && (abs(a1)>1+a2)
Error = 2;
end



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