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<BODY lang=CS style="tab-interval: 35.4pt" vLink=purple link=blue bgColor=white>
<DIV><FONT face="MS Sans Serif" size=2>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.</FONT></DIV>
<DIV><FONT face="MS Sans Serif" size=2>Na prevod DA je mozna vhodnejsi
sigma-delta modulace, pak staci na filtraci jednoducha dolni
propust.</FONT></DIV>
<DIV><FONT face="MS Sans Serif" size=2></FONT> </DIV>
<DIV><FONT face="MS Sans Serif" size=2>Danhard</FONT> </DIV>
<BLOCKQUOTE
style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV><FONT face="MS Sans Serif" size=2></FONT><FONT face="MS Sans Serif"
size=2></FONT><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><SPAN class=SpellE><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Zdravim</SPAN></FONT></SPAN><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Ono to <SPAN
class=SpellE>neni</SPAN> jen o tom filtru.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Docela <SPAN
class=SpellE>nechutne</SPAN> se to <SPAN class=SpellE>chova</SPAN>, <SPAN
class=SpellE>kdyz</SPAN> ten filtr <SPAN class=SpellE>budite</SPAN>
z <SPAN class=SpellE>nekterych</SPAN> bran MCU, <SPAN
class=SpellE>ktere</SPAN> <SPAN class=SpellE>namaji</SPAN> shodnou velikost
odporu <SPAN class=SpellE>pri</SPAN> sepnuti na Log.0 a
Log.1.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Typicky v <SPAN
class=SpellE>pripade</SPAN> <SPAN class=SpellE>vystupu</SPAN> <SPAN
class=SpellE>otevreny</SPAN> kolektor a <SPAN class=SpellE>nezalezi</SPAN> na
tom, ze je ten odpor v kolektoru na <SPAN
class=SpellE>cipu</SPAN>.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=SpellE><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Vysledekm</SPAN></FONT></SPAN><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> je, ze RC konstanty
se <SPAN class=SpellE>lisi</SPAN> <SPAN class=SpellE>pri</SPAN> <SPAN
class=SpellE>nabijeni</SPAN> a <SPAN class=SpellE>vybijeni</SPAN> a <SPAN
class=SpellE>me</SPAN> to <SPAN class=SpellE>delalo</SPAN> <SPAN
class=SpellE>potize</SPAN>,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=SpellE><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">kdyz</SPAN></FONT></SPAN><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> jsem <SPAN
class=SpellE>chtel</SPAN> <SPAN class=SpellE>dosahnout</SPAN> <SPAN
class=SpellE>vetsi</SPAN> <SPAN
class=SpellE>presnosti</SPAN>…<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=SpellE><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Takze</SPAN></FONT></SPAN><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> <SPAN
class=SpellE>neni</SPAN> od <SPAN class=SpellE>veci</SPAN> si zjistit zapojeni
<SPAN class=SpellE>tech</SPAN> <SPAN class=SpellE>vystupu</SPAN> v MCU a
sehnat si <SPAN class=SpellE>katalogove</SPAN> <SPAN class=SpellE>udaje</SPAN>
o odporech v <SPAN class=SpellE>jednotlivyh</SPAN>
stavech.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><SPAN class=SpellE><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Ja</SPAN></FONT></SPAN><FONT
face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"> jsem to nakonec
<SPAN class=SpellE>resil</SPAN> extra <SPAN class=SpellE>spinacem</SPAN>(Maxim
obvod) se <SPAN class=SpellE>zarucenym</SPAN> odporem v obou <SPAN
class=SpellE>vystupnich</SPAN> stavech…<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">A <SPAN
class=SpellE>az</SPAN> teprve za nim ten filtr…<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Ale na ten tu najdete
<SPAN class=SpellE>lepsi</SPAN> <SPAN class=SpellE>odborniky</SPAN>, <SPAN
class=SpellE>ja</SPAN> jsem jej navrhoval v <SPAN
class=SpellE>ElectronicWorkbench</SPAN>, <SPAN class=SpellE>takze</SPAN> jsem
se <SPAN class=SpellE>dival</SPAN> co se tam <SPAN
class=SpellE>deje</SPAN>.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial">Mimo to, pokud
nechcete <SPAN class=SpellE>vrazet</SPAN> prachy za <SPAN
class=SpellE>kvalitni</SPAN> <SPAN class=SpellE>vystupy</SPAN>(Maxim), tak
v <SPAN class=SpellE>kteremsi</SPAN> <SPAN class=SpellE>starem</SPAN>
AR/PE byl <SPAN class=SpellE>clanek</SPAN> s levnou náhražkou s CMOS
logikou a i ten filtr tam <SPAN class=SpellE>jakysi</SPAN> byl <SPAN
class=SpellE>popsany</SPAN>…<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial color=navy size=2><SPAN
style="FONT-SIZE: 10pt; COLOR: navy; FONT-FAMILY: Arial"><o:p> </o:p></SPAN></FONT></P>
<DIV>
<P class=MsoAutoSig><FONT face="Times New Roman" color=navy size=3><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; COLOR: navy; mso-ansi-language: EN-US; mso-no-proof: yes">S
pozdravem,<o:p></o:p></SPAN></FONT></P>
<P class=MsoAutoSig><FONT face="Times New Roman" color=navy size=3><SPAN
lang=EN-US
style="FONT-SIZE: 12pt; 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></DIV></BLOCKQUOTE></BODY></HTML>