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<DIV><FONT face=Courier size=2>Mozna, ze takovy BF199 (snad za 4Kc v GME) by
mohl stacit a hranate by to za nim mohlo byt dostatecne. Tim jak se to zesili,
se to oreze do obdelniku. Proste bych jen takhle jednoduse zkusil ten sinus
akorat natahnout pres cely rozsah napajeni. Samozrejme si dobre nastavte
pracovni bod tranzistoru.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT face=Courier size=2> O-----+-----+<BR>
Vc |
|<BR>
/
/<BR>
\
\<BR>
/
/<BR>
\
\<BR>
/
/<BR>
| |
Out<BR>
|
+--O<BR>
| |<BR> In | | |
|/<BR> O--+ +-+---|<BR> |
|
|\<BR>
V<BR>
|<BR> GND |
GND<BR> O------------+--O</FONT></DIV>
<DIV> </DIV>
<DIV> </DIV>
<DIV><FONT face=Courier size=2>--</FONT></DIV>
<DIV><FONT face=Courier size=2>Jiri Bezstarosti</FONT></DIV>
<DIV> </DIV>
<BLOCKQUOTE
style="BORDER-LEFT: #000000 2px solid; MARGIN-LEFT: 5px; MARGIN-RIGHT: 0px; PADDING-LEFT: 5px; PADDING-RIGHT: 0px">
<DIV style="FONT: 10pt arial CE">----- Original Message ----- </DIV>
<DIV
style="BACKGROUND: #e4e4e4; FONT: 10pt arial CE; font-color: black"><B>From:</B>
<A href="mailto:tskokan@volny.cz" title=tskokan@volny.cz>Tomáš Skokan</A>
</DIV>
<DIV style="FONT: 10pt arial CE"><B>To:</B> <A href="mailto:hw-list@hw.cz"
title=hw-list@hw.cz>hw-list@hw.cz</A> </DIV>
<DIV style="FONT: 10pt arial CE"><B>Sent:</B> Wednesday, February 16, 2005
6:53 PM</DIV>
<DIV style="FONT: 10pt arial CE"><B>Subject:</B> prevodnik sinusovka obdelnik
80MHz</DIV>
<DIV><BR></DIV>
<DIV class=Section1>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Zdravim,<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">mam nasledujicim problemem: na
vystupu LVDS prevodniku dostavam CLK signal se sinusovym prubehem, timto
signalem potrebuji ridit CPLD, potrebuji tedy obdelnikovy prubeh.
Problem je v celkem vysoke frekvenci 80MHz. Cele zarizeni by melo pouzivat
napajeni 5V/3.3V/2.5V, nerad bych tam daval nejaky dalsi
prevodnik.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Zatim jsem zkousel vyrobyt
potrebny prubeh uzitim 74lvc2g14 (dve hradla, invertor se Schmittovym K.O.),
dalsi pokus byl s OZ OPA357 zapojenym jako Schmittuv K.O. a posledni s dvojici
vf tranzistoru zapojenych jako Schmittuv K.O.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Problem je s frekvenci, do radove
15MHz bez problemu, pote nepouzitelne.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Dekuji za jakoukoliv radu, ktera
me nasmeruje k vyreseni tohoto problemu.<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt">Tomas Skokan
<o:p></o:p></SPAN></FONT></P>
<P class=MsoNormal><FONT face=Arial size=2><SPAN lang=EN-US
style="FONT-FAMILY: Arial; FONT-SIZE: 10pt"><o:p> </o:p></SPAN></FONT></P></DIV>
<P>
<HR>
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