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17th March 2004 21:56 #1Dark SkywalkerGuest
, , .
. - , (Vi) , LM311. , (Vmax), LM311 . LM311, R7 . , , , .
:

( , , )
(), : Vi Vmax, LM311 Vomin = 0.25V (Output Saturation Voltage ); , Vmax, ( Vomax=Vcc) , Vi Vmin.
, , :
Vmin = 2.0 V
Vmax = 2.5 V
R3+R4 = 100k
Vcc = 5.0V
R7 ( 2k 10 - )
R3, R4, R5 R6, , R5, R6 R3 LM311, R6<<R3.
, , R3, R4, R5 R6, . ?
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17th March 2004 23:00 #2
LM397
LM239/339
LM193/293/393
pdf .
AN-74 Aplication Hunts LM139, , .MacBook Air 13"
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17th March 2004 23:35 #3
( ) , . Vi<Vop1=Vmax --> Vo=oH; Vi>Vop1=Vmax --> Vo=oL
Vi>Vop2=Vmin --> Vo=oL; Vi<Vop2=Vmin --> Vo=oH
dV=Vop1-Vop2 -> (Vmax-Vmin)
H - High Level (1)
oL - Low level (0)
- , R3 !
1. dV= [Vcc(R5*R6)]/[(R5*R6)+(R5*R4)+(R6*R4)]
2. dV/Vop2= [1+(R5/R4)+(R5/R6)]/[1+(R4/R6)+(R4/R5)]
R5=(n*R4), dV/Vop2=n
R6
R6= [R5||R4]/[(Vcc/Vop1) -1]
LM311 R7 Vcc.
- Rt R4 .
, Vlado_vrg, pdf-a, .
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18th March 2004 14:15 #4
[bg]Zaradi dylbokata POW systoqnieto na izhoda se preoby]a strymno, mignoweno, [/bg]R4 [bg]"zalepwa" za [/bg]Vcc [bg]ili 0.25. Zatowa ti predlagam da razleda[ dwata slu`aq otdelno samo s rezistorite. Kato sledi[ potencialite na inwertira]iq i neinwertira] whod move[ da izrazi[ momentite na prehod.[/bg]




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