1
3
2
3

5
4



bc

Rb IB
Rc

C1 C2 C1 C2 C1 C2
E

2

UBE UCE IBIC Q UBEQUCEQIBQICQ
b C1C2
1
UBEQ << UE

[1] UE = 12 VRb = 200 kRc = 2.4 k = 50


[2] UE = 12 VRc = 2 k = 50 ICQ = 4 mA Rb



2
Q IBQ Q IBQ
UE Rb IC



ui C1 b e UBEQ
UBEQ ui

uBE iB iB IBQ iB

ICQ ic
iC uCE uCE UCEQ uce


ICQ ic
iC uCE uCE UCEQ uce




2

2 YA YB V /
3 180
2
Rb Q UBEOIBQ IB = 0IC 0Rb IB = 0

2
1
Rb Rb ——
2
Rb Q UBEQ IBQ iB iC = ICES iC UCES

2
2


1 Ri

Ro Eo Ro

4
1
uo Uo ui Ui
2
2
3

ULN2003500 mA50V ULN2003

ULN2003ULN20031CPUCPUULN200316KULN200316KCPU



Xo→ F → Xi → Xi → A
3
Xf Xi Xi Xi
4
1

2
3

Xo → F → Xf → Xi → Xo

2


3
0.707 fL fH BW
BW = fH - fL

1
4



2

1Rb IBQ
2 ui C1 uo Re


——
ube —— be
uf —— Reuf = Re ie uo
F——


uf ui = ui – uf = ube ib

——
2
3
——
4
V1V2 NPN PNP
——

V1 V2 V2 V1 V1V2
V1V2


2

1
2

4 UP UN
3 Uo
5
7
6

3

4LM324

LM324
2 Ri =
1 Ao =









1
AUF——

2
2 UN = 0IN = IP = 0 0IN = 0If = I1 UN = 0 1UP = UNUP = 0

If = I1
2
3 UP = UN = 0 0“”“”

1

2
Uo = [(R1 + Rf) / R1] Ui

2 R1 Rf


1










a
b





ui R1 R2 ui1 ui2 uo
1




R1 = R2ui1 = ui / 2 ui2 = - ui / 2

AUD
2 AUC
KCMR
60 80 dB 120 dB A
dB= 20 lg A
RPRe –EE ,
RP —— ui = 0 uo RP uo = 0 1 k
Re——

RE RE uCEB = uC – uE EE RE
iC1 iC2 RE

6
UA = 9 V UB = 9 .001 V, UAB = 0.001 V
1 UA UB 10 V 1 mV
2 UAB 1 mV 1 mV


A B 1 mV



3

4 C
5

7 33 nF C2 uC2
1
3 C2 L1

“”

1




L2 N2 f0 C

LC L1L2 L1L3

2 LC
LC f0 L Cb L1L2
M L1 L2



c. f0
3 LC
bC2
RC




1
1 RLC R

2RLC C0

2



1

→→“”→ fo →→ fo → fo →→

2
3


LC L C




L
3

7
10

13
15“”“”

19
22