-
2007
-
2007
-
Bun de tipar Formatul 60 x 84 1/16 Hrtie ofset. Tipar ofset.
Tirajul 50 ex. Coli de tipar 4.0. Comanda nr. U.T.M., 2005, Chiinu,
bd. tefan cel Mare, 168. Secia Redactare i Editare a U.T.M. 2068,
Chiinu, str. Studenilor, 11.
-
, , , .
II U IV 2102, " ". , . : .., ,
. : .., ,
. : .., ,
.
, 2007
-
3
1. . : .
1. , u(t) c
:
=
++=1
110 )sincos(
2)(
nnn tnbtna
atu (1) :
(4) ;sin)(2
(3) ;cos)(2
(2) ;)()(2
2
2
1
2
2
1
2
2
0
=
=
=
T
Tn
T
Tn
T
T
dttntuT
b
dttntuT
a
tdtuT
a
, u(t) [-T/2, T/2], (1) (3) (2); u(t) , (4), (2) (3) . , , ,
(U==a0/2) Un ()
-
4
n=n1. 1=2/T , .
, U0, u (.1).
.1.
u(t) , 0 . :
( ) ,12
002
2
02
2
02
2
0 |qU
TUt
TUdt
TUdttu
TaU u
u
u
u
u
u
u
======
=
q = T/u - .
( )
.sin22
sin2 sin
cos2 cos2
0102
2
10
12
2
12
2
1
01
0
|qn
nun
nutn
nu
tndtnTn
udttnTuUa
u
u
u
u
u
u
unn
===
====
t
-u/2 u/20
U0
u(t
-
5
, U0 q. u(t) (.2)
.2.
2.
1. .
2. u(t) ( ).
3. 1. 1
Ui qi
U= U1 U2 U3 U4 U5
q1
q2
q3
q4
4.
u(t) qi (i = 1,2,3,4).
U5U=
U1 U2
U3
1 0 2
U4
3 4 5
Ui
n/1
-
6
3.
1. Word . 2. Electronics Workbench
. 3.
.
4. () .
4.
1. . 2. . 3. . 4. .
5.
1. ?
. 2. ? 3. ? 4. .
-
7
2. . : .
1.
. Y(t)=E0+Ym cosnt X(t)=Xmcosnt, ..:
UAM(t) =Y(t)X(t)=(E0+Ymcost)Xmcosnt = = E0Xmcosnt+YmXmcosntcost
= =E0Xmcosnt+0,5YmXmcos(n++)t+0,5YmXmcos(n-)t =
Em{cosnt+0,5Mcos(n+)t+0,5Mcos(n-)t},
Em=E0Xm; M=Ym/E0 . , - (.1) n, (n+) ( ) (n-) ( ).
.1. -
Em
MEm/2 MEm/2
n+n- n
-
8
(1, 2, , max), , - , : =(n+max)-(n-max) =2max, .. .
, , , . -.
U(t)=EmMcosntcost=0,5EmMcos(n+)t + +0,5EmMcos(n-)t.
- ,
(.2).
.2. .2, , . - .3.
AM1
AM2
-1-1
+ U(t)
V3(t) V1(t)
V2(t)
U(t)
U(t)
-
9
.3. -
) - V1(t); ) - V3(t); ) - V2(t) ; ) - V(t).
m
- +
Mm/2 Mm/2
a)
Mm/2
)
Mm/2
m
)
Mm/2 Mm/2
m
- +
)
Mm/2 Mm/2
- +
-
10
2.
1. - .
2. - .
3. - .
3. 1. Electronics Workbench
(.4).
.4.
R1=R2=R3=10K 2. - , .
3. , .
4. Electronics Workbench (.5).
+
+
~
X
~
R1 R3
DA1E0
Y(t) X(t)
kXY Y
R2
~
~
-
11
.5.
R1=R2=R3=R4=R5=R6=10K; R7=R8=R9=R10=300K 5. - ,
. 6. - . 7.
. 5.
1. . 2. . 3. . 4. . 5. . 6. 1.
- ? 2. -
( ) ?
3. -?
4. SSB- ?
R1
R2
R3
R4
R5 R6
R7
R8
R9
R10
VD1
VD2
VD3
VD4
DA1
DA2
DA3 T1
Y(t)
-
12
3. . : .
1.
, , ; ..
UHEC (t)=Umcos(t),
(t)=HECt+kU(t)=0+kUcost.= 0+m cost.
, :
U(t)=Umcos(t+ mcost), m - .
-, :
(t)=(t)=HEC - msint.
, .
- , , ..
(t)=HEC+cost,
=SmU , Sm- . - :
(t)=(t)dt=HECt+/sint=HECt+mfsint,
mf .
-
13
, : =SmU , , mf=/ =const(U=const) ; m=kU , . , . , , , . - :
=2(m+1)max .
:
=2=2mfmax=2/max,
.. max, mf, .. , . - :
F 2Fmax(1+mf+mf),
, , , , .. N1+mf+mf (.1).
-
14
.1.
mf ; mf HEC .
2.
1. ( ) .
2. - , mf
-
15
, , . , R. DA1 :
Ut+(p) =UHEC(p)pRC/(1+pRC).
DA1 (K+=(1+R2/R1)=2). UHEC (K-=R2/R1=1), . ,
U()=2U+()- U()= U()(RC-1)/(RC+1)
:
()=(RC-1)/(RC+1) (1)
p=j, :
K(j)=(2R2C2+j2RC-1)/(1+2R2C2). (2)
1, :
=2arctg(RC). (3)
, RC- 00 1800 (R=Var). R ( ) , (3) .
-
16
2. Electronics Workbench (.3). .3.
U0
3. IDEAL 4.
4. U0 0.4 R .
5. (3) R (U0=0,2,4) (.2), U0.
6. ( ) .
4.
1. . 2. R U0. 3. . 4. (). 5. .
+-
VT1R1
R2
U0 +
-
-
17
6.
1. ?
2. ?
3. , mf
-
18
4. . : , .
1. ,
, , , .. , . , U(t) U(t) : U(t)=f(U,t). (1) , .. . , (1) t. . .
, , (/), u, - i, / - (...). , ... / , , /, ... , . , , , .
-
19
, / , - /. UH S, (.1):
( ) ( ) ( )2 .Uu ,U-uS,Uu ,0
HH
H
-
20
In (n=1,2,3,). :
( )4 , ), cos(21
00 tdUtUiI m
=
(5) coscos1 0 tdtn) t, Ui(UI
mn =
(4) (5) Um, U0, . /, ... - u=U0+Umcos t (.2):
.2. /
, /, (2)
:
i(u)=S (U-UH)=S (U0+Um cos t-UH). (6)
u
i
0
2
UH
i
U0
0 t
2
t Um
-
21
.2 , t =, / , (6) :
cos =(UH-U0)/Um (7)
, (4), (5) :
i(u)=SUm(cos t-cos ). (8)
(8) , S Um , .. . , :
( )(9) ),()cos(sin1
)cos (cos1 )cos (cos21
21
0
0
==
===
tdttdttdui
)(0 - /.
/ :
I0 =SUm )(0 . (10) :
(11) , )cossin(1)( 1 =
: ( ) (12) 11 = mSUI
(n>1) :
-
22
( ) (13) 1
sincoscossin2 2 , )(nnnnn
n
=
In=SUmn() (14)
2.
1. (I0, I1, I2) () :S, U0, UH, Um.
2. Electronics Workbench.
3. (I0, I1, I2) (), ... .
4. .1 .3. 3. 1. Electronics Workbench
, . 2. ,
(.3).
Uc(t)=Umcost .3. ,
U
RC
U0+
-VT1
E+
~
-
23
3. Ic. .
4. Electronics Workbench I0, I1, I2. .
4.
1. . 2. . 3. . 4. . 5. .
6.
1. ... ?
2. () .
3. ?
4. ?
:
1. .. : . .: .. 1988-448 .
2. .. . . .: .., 1987. 207 .
3. . ; . .. - .: , 1989. 248 .
4. .. IBM PC. Electronics Workbench . .: -, 2001.-726 .
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