2
1. .
2. ?
3. , ?
4. ?
3
3
1.1 .
1.2 .
. - p-n .
(. 3.1 , ), .
U0=I0R ‑ U=0; U1 U=U0; R .
3.1
, , , , .
. p-n . (. 3.2,) .
3.2
,
U2 Ux=eU3; U3 , U =0.
:
1) ;
2) , ;
3) ;
4) ;
5) .
Workbench 5.0 , 3.3. DA1, ‑ DA2.
3.3 |
[3].
.
Analysis/ Parameter Sweep. . :
|
|
Component | V1 |
Parameter | Voltage |
Start Value | |
End Value | 0.05(n+5) V |
Sweep Type | Linear |
Increment Size | 0.005 V |
Output node | DA1 |
n
Sweep for: DC Operation point.
Simulate. .
.
:
Component | V1 |
Parameter | Voltage |
Start Value | |
End Value | (n+5) V |
Sweep Type | Linear |
Increment Size | 0.05 V |
Output node | DA2 |
n
.
3
1. ?
2. .
3. ?
4. ( ) () ?
5. ?
4
1.1 .
1.2 Workbench 5.0.
, . , .
, ,
, (1)
‑ ; (t) ‑ .
k(t), (t2 - t1):
,
k =1, 2, 3,..., m; n =1, 2, 3,..., m n¹.
, , , .
k(t)
,
.
k(t) ,
.
, ,
. (2)
, (t) (t2-t1) k(t). m .
|
|
, , .
, . sin(n w0 t) sin(m w0 t), sin( w0t) cos(m w0 t), cos(n w0 t) cos( w0 t), . (t) (to,to +2p/w0) () :
,
t0<t<t0 + .
ai :
:
,
,
.
, (k =0, 1, 2,...) (to, to +2p/w0) to.
k = , I = , ¹ I =0.
, (t) ‑
.
T w0=2p/; 2w0; w0;...; nw0. (t) , w0, 2w0 .. ().
, : (. 4.1 , ). , , , 0 90.
4.1 () ()
, , , (t) ‑ , .
() , . : , , . , ( ) . : K K.
,
Ui i- .
, 0 1. =0.
,
U1 .
, ,
.
, 0 ∞.
, ≈ ( ≤0,1 1%. =0.
|
|
Workbench . , . , .
:
.
: Xm, T0 t. . , (. 6.8):
Q = T /t,
, (duty cycle):
q =t/ T.
:
3.1 , 4.2 .
4.2
3.2 . , 4.2 . . .
3.3 .
3.4 Frequency (n) , n , Duty cycle 50, Amplitude 11 , Offset 0.
3.5 . . Time base 0,5 /. Channel A 5 /.
3.6 Analysis/Analysis Options... Instruments Pause after each screen . , , .
3.7 Analysis/Activate , .
3.8 , , (, ).
3.9 , Analysis/Stop .
.
3.10 . Analysis/Fourier... , Fundamental Frequency (n) , Number of harmonics 75. Simulate .
3.11 ( ) 1. Total harmonic distortion ( ). .
3.12 . Duty cycle (n). , 3.7 ‑ 3.9
3.13 , 3.10 ‑ 3.11. 1.
3.14 Duty cycle 50 (100- n).
|
|
3.15 . Duty cycle n. , 3.7 ‑ 3.9
3.16 , 3.10‑3.11. 1.
3.17 Duty cycle 50 (100- n).
1
/ | Duty cycle | |||
n | ||||
100- n | ||||
n | ||||
100- n |
1. ?
2. ?
3. ?
4. 1?
5. Duty cycle?
5
1.1 RC
1.2 RC RC .
RC R C. f U, ( ) f U, , T , ∆t () () . RC . , RC KU 0 1. f KU j . KU (f) - (), j(f) - () RC .
RC C, , . RC (). , . , . , RC . , t1 t2 RC
.
RC ().
, , fcp, ..
.
, (f > fcp) .
RC , , (). 0 fcp.
3.1 RC
, (), RC 5.1.
5.1 RC
: R =2 n , = n , n .
, , ( 5.2). , ( ). , ( C R).
5.2 () () RC
RC EWB (. 5.3).
Analysis AC Frecuensy - - . ( 5.3): (Start frequency) n ; (End frequency) 10000 ; , X (Decade) (10, 100, 1 ..); (Number of points) 100; , Y, (Linear); , (Nodes for analysis) 4.
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|
5.3
Simulate. , () () RC - (. 5.4). , , . ( ) . fcp . f =0,1 f , f =10 f . .
5.4
3.2 RC
, 5.1 (. 5.5).
5.5. RC
f =0,1 f , f 10 f , RC , (. 5.6).
5.6 RC
0,1 f , f 10 f .
1. ?
2. ?
3. ?
4. RC RC ?