1
1 2012/2013
1
: : 1221/10
:
2013. . 1. 1. . : , . BC547B, .2.
, rcad Capture. , , , :
1:
IDC1(0500)ASOURCE
VDC1(01.2)VSOURCE
VDC2(0 6 ) VSOURCE
0/SOURCE///SOURCE
BC547B///EBIPOLAR
VDC4(0-70)VSOURCE
VDC3(030)VSOURCE
3.
1)
(Ib) (Ube), (Uce=const.) .
Ib=f(Ube), Uce=const.
1.
2. BC547B T= 0C
3. BC547B T= 25C
4. BC547B T= 25C
2, 3 4 . , . .
2) , . . (Ic) (Ib), Uce .
Ic=f(Ib), Uce=const.
6,7 8. Uce=3 V, Uce=6 V.
5.
5. T=0 C
6. T= 25 C
7. T= 100 C , 3 . OrCad-u. T= 0 C:
8. 1 (Ib=200 uA) , (Ic=44.949 mA).= 225 T=100 C:
9.
1 (Ib=200 uA) , (Ic=64.25 mA).= 321 .
3) (Ic) (Uce), (Ib) .
Ic= f(Uce), Ib= const.
10.
11. T= 0 C
12. T= 25 C
13. T= 100 C
11 , 12 13 . . .
4) BC547B , : Ucmax=50V; Icmax=100mA; Pdismax=500mW:
14.
( 15) . .
15.
5) h Q(UCEQ,ICQ)=Q(7 V, 2 mA)
h :
Vbe=h11Ib+h12VceIc=h21Ib+h22Vce
h :
16.
h11=?h11=, VCE=const
h11 = = h11 = 4.474 k
17. h21=?h21= , VCE=consth21= =h21= 340
18.
h12=?
h12= , IB=consth12=h12= 1.74 * 0
19.
h22=?
h22= , IB=consth22=h22= 0.029 mS
20. h
6) Y Y11= =
Y12 = - = - = 6.4 0
Y21 = = = 75.99 mS
Y22 = = 0.029 mS
21. y :
= h11 = 4.474 k= = = = 75.99 mS= = 34.48 k
22.
. 2. RC (ZE)
1.
. , , , , .
2.
, rcad. , , , :
2.
R1150kANALOG
R227kANALOG
R32,7kANALOG
R4470ANALOG
R510kANALOG
VDC212VSOURCE
VSIN1(ampl. 10mV,frek. 1kHz)SOURCE
VSIN3(ampl. 10V,frek. 1kHz)SOURCE
C11FANALOG
C210FANALOG
C3100FANALOG
C61nFANALOG
0/SOURCE///SOURCE
BC547B1,BC547B2///EBIPOLAR
VAC41VSOURCE
3.
23. h11 h21Ib Vin Rc Vout
24. h : : Av=-200 , ICQ=2 mA, C1=1 F, C2=10 F ,C3=100 F ,
T=BC547B. h : h11=4.25k, h21=332, h12=h22=0.
:Av=-200Av=Vout=-h21IbRc 24Ib=Av= - h21 Rc =-200 RcRc=2.56 k 2.7 k
= h21 = 332ICQ = IBQ IBQIBQ = 6.02 A RE . RE 10 30 VCC 0.5 V 3 V. :
VRe=1 VIBQ 0 IEQ ICQ = 2 mARE= = 500 470 IBQ I Rb1 Rb2 10 -
IBQ.I=10 IBQI= 60.2 ARb1 + Rb2 = = 199 k 0.7 V.Vbe = 0.7 VVbe + VRe
= Rb2 10 IBQ Rb2=28.24 k 27 k Rb1= 199 k - 28.24 k = 170.76 k Rb1=
150 k :VCEQ = VCC VRE RC ICQVCEQ = 5.6 VQ(VCEQ ,ICQ , IBQ ) = Q(5.6
V, 2 mA, 6.02 A) . VCE1 = VCEQ 0 V = VCEQ = 5,6 V
VCE2= 12V VCEQ = 12V 5,6V = 6,4V : Voutmax = 5.6 V :
25. h21 = 332
Rin=Re(1+ ) = 470 (1 + 340) = 156.51 k
Vb = = 1.6 V
Vbe = Vb - VeVe= 0.9 VIe = = 1.9 mA
Ie = Ib + Ic = Ib(1 + )Ib= Ib = 5.7 A
Ic = Ie Ib Ic = 1.89 mA
Vc = Vcc Rc IcVc = 6.9 VVce = Vc - VeVce = 6 V
Q(Vceq = 6 V, Icq = 1.89 mA, Ibq = 5.57 A)
:
:
26.
Rin = Rin = h11 = 4.25 k
:
27.
Rout = Vin = 0 Vin = 0 = Ib = 0Rout = Rc = 2.7 k
:
28.
Av=Vout = - h21 IbIb =
Av=- Av = -166.1 :
29.
Av=Vout = - h21 Ib2Ib2 = -h21Ib1Av = h21 Av = Av1 Av2 =
21678.3
:
30.
Ai =iout = h21 ib
Ai = h21Ai = 70.58
:
Cs1:
31.
fd1 = = 37.5 Hz
Cs2:
32.
fd2 = = 1.25 Hz
Cs3:
33.
fd2 = = 1591.6
:
33. fg = = 74.9 kHz
OrCad : :
34. :Q(IC=2,113mA;VCE=6,294V;IB=6,639A)
:
35.
36. ( ) ( )
.
Av = = 147
. .
37.
:
38.
, , , : Rout= = 2.52 k
39.
40. Rin = = 3.83 k
41.
42. fd = 523 Hz i fg = 24.5 kHz
1.
, . . .
2.
, . Excel, , , , . :
3.
150k, 27k, 2,7k, 10k, 470
1F, 10F, 100F, 1nF
///
///
12 V
(BC547B)///
///
3.
41.
2. 3. . :- (5 mV/div ; 0.2 ms)- (0.2 V/div ; 0.2 ms)
42.
43.
44. 3V, ; 0,5mV/div i 0,2s.
4. i12345678910
f[kHz]0.010.050.10.5110100150200400
Vo[v]0.030.170.320.580.60.60.550.50.450.3
A2.514.1726.6748.33505045.8341.6737.525
. 3 FET 2N4416 2N7000
1.
JFET MOSFET . FET , .
2.
, rcad. , , , :
5.
2N4416///JFET
2N7000///PWRMOS
VDC1(0 5)VSOURCE
VDC25 VSOURCE
VDC3(0 30) VSOURCE
0/SOURCE///SOURCE
3.
JFET
(Id) (Vgs), Vds=const. Id=f(Vgs), Vds=const.
45. 2N4416
46. T=25 C
47. T=100 C
Vgs=0 Idss, . , Vgs, , , . Vgs= -3V 0 , . Idss , .
2N4416
Id, Vds, Vgs=const.
Id=f(Vds), Vgs=const.
48.
49. 2N4416 T=25 C
49. 2N4416 T=100 C
JFET 2N4416
: Pdis=300mW, Pdis=400mW, Idmax=15mA, Vdmax=30V
50. T=25 C
( ).
(JFET)
gm
VT=-3V, Vds=5V, Idss=9,522mA
gm = Vds= const
51.
52.
gm = gm = 3.33 mS
Ri
Vgs = -1 V
Ri = Vgs= const
53. Ri =
Ri = 11.32 k
= gm Ri
= 37.7
MOSFET
54. MOSFET 2N7000
55. T=25 C Vds=10V
56. T=100 C Vds=10V
MOSFET , 2V, , . Vgs . . 55 56 .
MOSFET
57. T=25 C
58. T=100 C
Vds , . .
(MOSFET)
Ri= Vgs = 4 V
Ri =
gm = Vds= const
Vds= 5V
59.
gm = 189.75 mS
= gm Ri =
MOSFET 2N7000
: Pdis=400mW, Idmax=200mA,Vdsmax=60V :
60.
4: RC
1.
. , , , , .
2.
, rcad. , , , :
6. :
R1100 kANALOG
R248 kANALOG
R31.2 kANALOG
R410kANALOG
C11kANALOG
C210FANALOG
C31nFANALOG
VDC112VSOURCE
VSIN1(ampl. 10mV,frek. 1kHz)SOURCE
VAC11VSOURCE
VSIN2(ampl. 10mV,frek. 1kHz)SOURCE
2N7000///PWRMOS
0///SOURCE
3.
61. :
Idq =5.1 mA Vgs = 2.32 V
:
62.
Rs =1200 R1 = 48 kR2 = 100 k
Vds = Vdd - RsIdq
Vds = 6 V
Vgs = R1 IdR = 2.1 V
Q(Vds = 6V, Vgs = 2.1 V, Id = 5 mA)
:
Vds1 = Vds 0V = 6VVds2 = 12V Vds = 6V
Vdsmax = 6V
63.
Rin =
Rin = R1 || R2 = 32 k
64.
Rout =
Iout + gmVgs = Is
Vgs + Vout = 0
Vgs = - Vout
Is = Iout = + gmVout
Rout =
Rout = 37.3
65.
Rpp =
Vout + Vgs = Vin
Vout = gmRppVgs
gmRppVgs Vgs = Vin
Vgs (1 + gmRpp) = Vin
Vgs =
Av =
Av =
Av = 0.96
:
Cs1:
66.
fd1 =
fd1 = 4.91 Hz
Cs2:
67.
fd2 =
fd2 =1.42 Hz
fd =4.91 Hz
68.
fg =
fg =4.29 MHz
69.
Q(VGS=3.89 V;ID=4,832mA;VDS=6,202V)
70.
71. ( ) ( )
Av =
Av = 0.97
72.
73. ( ) ( )
Ai =
Ai = 3.15
74.
74
Vin = 6 V
Voutmax = 5.1886 V
76.
Rin =
Rin = 32.28 k
77.
78.
Rout =
Rout = 34.75
1 nF
79.
80.
, :
fd =5.3 Hz fg = 5.03 MHz
1.
. . .
2.
, . . . . :
7.
100 k, 48 k,1.2 k,10 k
1F,10F
///
///
12 V
(2N7000)///
///
///
3.
:
81.
82.:
82.
(0.5 V/div ; 0.2 ms). , 1. .
83. :
82.
5 V, . : 2 V/div ; 0.2 ms.
Q:(VGS=1,748V;ID=5,27mA;VDS=5,53V)
, . .
2
