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FAQ

⇐ 3456789101112



R

R1 i1

U1

U2 R2

U

i2

Rn

Un

in

 

i1 + i2 + + in = ioc

j1 = j2 = 0

.

 

 

I = I = I   j2=j1=0
I

 

R

U U

 

 

 

I = I = I j2=j1=0  
R I

 

U U

 

 

U

3 +

U U U [B]

 

-

 

U = j1-j2

.

U = j1 j2 = 0 U = j1-j2 = 0


 

 

U

3 +

U U U [B]

2 0

 

-

 

+0

 

j2= 0

 

 

R2

 

>
R1

U U

 

 

.

 
 
1. U Þ Um- Um+ Um+ = Um Um- = - Um | Um-|=| Um+|   2. 2. ¯ U Þ Um+ Um-    


U

 

U

 

U U

 

¯U: U = U

 

U= gUm

 

 
 


U U

 

R1 R2 i

 

 

.

 

 
 
3. ¯U Þ Um- Um+ 4. U Þ Um+ Um-    


U

 

 


U

 
 


U U

 

 
 

 

 


 

. , . (). , () . () . : . . - Þ . - . . ():

R1-R2 .   R-C .

 

j1>j2 Þ U = Um+

j1<j2 Þ U = Um-

U=j1-j2  
Um+  

 

U= -Um ( . t0) U= Um-Þ j1= jUm- = - jUm U= Um+Þ j1= jUm     Uc(¥)=Um Uc(0)=-jUm Uc(t)=jUm j = R1 / (R1+R2)

 

Q = T/t = (t+ + t-) / t = 2 t / t = 2

f = 1/T

 

.

 

1. t = (R+i) = RC, .. R>>r i 0

 

2. j ( ) Þ ( ) Þ j = 1/3 2/3

 

 

3. R << r , r (.. ) Þ R = 100 >> R

 

 

4. (- ) Þ C >> C.

 

 

5. (.. t+ ¹ t-),

 

 

j (.. R1 R2) Þ t+ t-

( U)

E

 

[R1]

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