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<div class=Section1>
<p class=MsoNormal><span class=SpellE><font size=2 color=navy face=Arial><span
style='font-size:10.0pt;font-family:Arial;color:navy'>Zdravim</span></font></span><font
size=2 color=navy face=Arial><span style='font-size:10.0pt;font-family:Arial;
color:navy'>,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>A pak, ze ta x51 je <span class=SpellE>nejaky</span>
<span class=SpellE>zazrak</span> <span style='mso-spacerun:yes'> </span></span></font><font
size=2 color=navy face=Wingdings><span style='font-size:10.0pt;font-family:
Wingdings;mso-ascii-font-family:Arial;mso-hansi-font-family:Arial;mso-bidi-font-family:
Arial;color:navy;mso-char-type:symbol;mso-symbol-font-family:Wingdings'><span
style='mso-char-type:symbol;mso-symbol-font-family:Wingdings'>J</span></span></font><font
size=2 color=navy face=Arial><span lang=EN-US style='font-size:10.0pt;
font-family:Arial;color:navy;mso-ansi-language:EN-US'>.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span lang=EN-US
style='font-size:10.0pt;font-family:Arial;color:navy;mso-ansi-language:EN-US'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoAutoSig><font size=3 color=navy face="Times New Roman"><span
lang=EN-US style='font-size:12.0pt;color:navy;mso-ansi-language:EN-US;
mso-no-proof:yes'>S pozdravem,<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=3 color=navy face="Times New Roman"><span
lang=EN-US style='font-size:12.0pt;color:navy;mso-ansi-language:EN-US;
mso-no-proof:yes'><span style='mso-spacerun:yes'>
</span>Marek Pavlu<o:p></o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'>
<p class=MsoNormal><font size=2 face=Tahoma><span style='font-size:10.0pt;
font-family:Tahoma'>-----<span class=SpellE>Original</span> <span class=SpellE>Message</span>-----<br>
<b><span style='font-weight:bold'>From:</span></b>
hw-list-bounces@mailman.nethouse.cz
[mailto:hw-list-bounces@mailman.nethouse.cz] <b><span style='font-weight:bold'>On
Behalf Of </span></b>Danhard<br>
<b><span style='font-weight:bold'>Sent:</span></b> Saturday, July 24, 2004 2:46
PM<br>
<b><span style='font-weight:bold'>To:</span></b> [HWnews]<br>
<b><span style='font-weight:bold'>Subject:</span></b> Re: Poradite pri patku s
PWM , respektive s navrhem RC filtru?</span></font></p>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
<div>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'>ADuC84x nema symetrickou strukturu vystupu
(jako vsechny odvary x51), ten se nehodi primo pro prevod na analog, zaradte
nejakou HCMOS logiku, ta ma pri 5V napajeni cca 30R do zeme cca 50R do VCC,
muzete zaradit nekolik vystupu paralene.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'>Na prevod DA je mozna vhodnejsi sigma-delta
modulace, pak staci na filtraci jednoducha dolni propust.</span></font><o:p></o:p></p>
</div>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'> <o:p></o:p></span></font></p>
</div>
<div>
<p class=MsoNormal><font size=2 face="MS Sans Serif"><span style='font-size:
10.0pt;font-family:"MS Sans Serif"'>Danhard</span></font> <o:p></o:p></p>
</div>
<blockquote style='border:none;border-left:solid black 1.5pt;padding:0cm 0cm 0cm 4.0pt;
margin-left:3.75pt;margin-top:5.0pt;margin-right:0cm;margin-bottom:5.0pt'>
<div>
<p class=MsoNormal><font size=3 face="Times New Roman"><span style='font-size:
12.0pt'><o:p> </o:p></span></font></p>
</div>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Zdravim,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ono to neni jen o tom filtru.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Docela nechutne se to chova, kdyz ten
filtr budite z nekterych bran MCU, ktere namaji shodnou velikost odporu
pri sepnuti na Log.0 a Log.1.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Typicky v pripade vystupu otevreny
kolektor a nezalezi na tom, ze je ten odpor v kolektoru na cipu.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Vysledekm je, ze RC konstanty se lisi pri
nabijeni a vybijeni a me to delalo potize,<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>kdyz jsem chtel dosahnout vetsi
presnosti…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Takze neni od veci si zjistit zapojeni
tech vystupu v MCU a sehnat si katalogove udaje o odporech
v jednotlivyh stavech.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ja jsem to nakonec resil extra
spinacem(Maxim obvod) se zarucenym odporem v obou vystupnich
stavech…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>A az teprve za nim ten filtr…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Ale na ten tu najdete lepsi odborniky, ja
jsem jej navrhoval v ElectronicWorkbench, takze jsem se dival co se tam
deje.<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'>Mimo to, pokud nechcete vrazet prachy za
kvalitni vystupy(Maxim), tak v kteremsi starem AR/PE byl clanek
s levnou náhražkou s CMOS logikou a i ten filtr tam jakysi byl
popsany…<o:p></o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<p class=MsoNormal><font size=2 color=navy face=Arial><span style='font-size:
10.0pt;font-family:Arial;color:navy'><o:p> </o:p></span></font></p>
<div>
<p class=MsoAutoSig><font size=3 color=navy face="Times New Roman"><span
lang=EN-US style='font-size:12.0pt;color:navy;mso-ansi-language:EN-US;
mso-no-proof:yes'>S pozdravem,<o:p></o:p></span></font></p>
<p class=MsoAutoSig><font size=3 color=navy face="Times New Roman"><span
lang=EN-US style='font-size:12.0pt;color:navy;mso-ansi-language:EN-US;
mso-no-proof:yes'><span style='mso-spacerun:yes'>
</span>Marek Pavlu<o:p></o:p></span></font></p>
</div>
</blockquote>
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