( ), , . , ( ) - . R(t), L(t) C(t).
VLG-, () u(t). - S(t)=S[u(t)]. VLG- u(t), :
ic(t)=i(t)=S(t)u(t)=S[u(t)]u(t). (5.1)
, . ,
u(t)=u1(t)+u2(t), (5.2)
, (5.2) (5.1),
i(t)=S(t)u1(t)+S(t)u2(t)= i1(t)+ i2(t) (5.3)
(5.3) , .
. . , , . , - heterodyning . .
, (, , , ) ( ) ( , ) .
(.5.1) () (, -, ), () ω, , ( ).
.5.1.
-. ,
u(t)=Ucos ωt (5.4)
-
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S(t)=So+S1cos ωt (5.5)
So S1 .
- - uAM(t)= U(1+McosΩt)cosωot (5.1) (5.5) :
ic(t)=S(t)uAM(t)=(So+S1cos ωt) U(1+McosΩt)cosωot=
U(1+McosΩt)[Socosωot+0,5S1cos(ω-ωo)t+0,5cos(ω+ωo)t] (5.6)
ω=|ω-ω|. (5.7)
, (5.6), - ,
i(t)=0,5S1U(1+McosΩt)cosωt (5.8)
, (5.6) - .
ω=|mωnω|, (5.9)
m n .
. 5.2.
) )
.5.2. :
;
. . . :
u(t)=Uc(t)cosωot (5.10)
u(t)=Ucos ωt,
u(t)=kauc(t)u(t)=0,5kaUc(t)U[cos(ω-ωo)t+ cos(ω+ωo)t] (5.11)
ω=|ωω| .
. (5.4), (.. 3.2 I):
C(t)=Co+C1cosωt, (5.12)
1 .
, : ( ) (5.10) Uc. :
q(t)=C(t)uc(t)=(+1cosωt)Uccosωot=
=Uc(t)cosωot+0,51Uccos(ω - ωo)t+0,51Uccos(ω + ωo)t, (5.13)
, ,
i(t)=dq/dt=- ωooUcsinωot-0,5(ω-ωo)1Ucsin(ω-ωo)t-
-0,5(ω+ωo)1Ucsin(ω+ωo)t (5.14)
, ω=|ω-ω|, .
( ) , , . . , , , q :
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= q2/(2). (5.15)
, . , . , (5.15) :
d/dC= q2/2C2=-/ (5.16)
∆ ∆,
∆=- (5.17)
, (∆<0) (∆>0). (, ).
( ) , () . , , .
(.5.3). , e1(t) e2(t), ω1 ω2. 1 2, ω1 ω2. R 3, ,
ω3 = mω1+nω2, (5.18)
m n .
, . e1(t) e2(t) 1 2, R . :
1+2+=0 (5.19)
. 5.3.
, :
(5.20)
ω1 +ω2 =0 (5.21)
. , , ,
=0; =0. (5.22)
-. . , .
. , .5.3. e1(t) , e2(t) . (5.22) m=n=1,
=0; =0 (5.23)
( ) , , , , , . (5.23) , >0 1<0 2<0. , ω3=ω1+ω2 , . .
. , ω3=ω1-ω2 m=1, n =-1 (5.22).
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