3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3

3

3.1 kHzMHzkHzMHz

, , , , (),

(), LC ,,

12 -3dB BW3

0.1451

Y,

3.2 , , , , ,

, , , , ,

3.2.1 321 bb , be re, bc, kM ce,

Cbe, Cbc, m, C bc, , , C bcb e, C be, CM=(1+gmR'L)Cbc (3.2.1) Cbc, gm, RL, CM

, rcerbc, , 3.2.2

re= rbe=(1+0)reCbe+Cbc = (3.2.2)

k, T(K), IEQ, 0, fT r bbCbc0fT, (3.2.2)

3.2.2 3.2.3 , , , , , , , , , , ,

11122122, :

, , , , 324,

(3.2.3)

, 3.2.4)(3.2.5)(3.2.6)(3.2.7)

fe, re, re, , , , , , , , , (3.2.3)-(3.2.6)

, , , , , , , , , :yie=gie+jCie yoe=goe+jCoeyfe=|yfe|fe yre=|yre|re

3.2.3 , 1. , 3.2.1, , r beCbeCbc

0= gmr be f= (3.2.8), 0 , f (3.2.8)

2. fT || 1, fT

3 . f , , f 0

fT0f=g m rbe f fT0f ffTf (3.2.9)

3.3 , , LC

3.3.1 3.3.1bc, e , ,

2.3.1

, , , , , 3.3.2, re s, , ie

, , , 2, 1, n22yie Y'L, :

(3.3.2)(3.3.1)

, ,

Y(3.2.3):(3.3.3): (3.3.3)(3.3.4)(3.3.5)

(3.3.5)(3.3.6)(3.3.1), , YL=n21YLYL, e0,

YL=(ge0+jC+ +n22yie

(3.3.6)(3.3.7)(3.3.8)

3.2.7, 3.3.83.3.7, :

: g=n21goe+n22gie+ge0 C=n21Coe+n22Cie+C

(3.3.9)(3.3.11)(3.3.10)

L QL= , ,

|Au0 |=(3.3.14)(3.3.13)(3.3.12)

N(f), Au=3.3.15, N(f),

(3.3.15)(3.3.16)

fe, fe, , 3.3.1180 , , (1) u0, |yfe|, oe (2) u0, , , ie (3) e0, u0e00, 0

(4) u012, 12e, e,12, , , , , , , QQ 3.1 3.3.1, 0MHz, cc, e mA

gie=12mS,Cie=12pFgoe=400S,Coe=95pF|yfe|=583mS, fe=-22|yre|=310S, re=-888,H, 1, 2, 0 u00.7,

g=ge0+n21goe+n22gie=37.910-6+40010-6+0.321210-3=0.5510-3S

Au0= Qe=

, , ,

3.3.2 , , u1, u2, , un, , nu1u2un (3.3.17) , 3.3.15, An=(Au1)n= (n1n2)n|yfe|n (3.3.18)

Nf= BWn=2f 0.7= , , , , (3.3.19)(3.3.20)(3.3.21)

, , , , , , 3.2 MHz, , : 3.3.21, n=2,

, , , , 0.1, nn001, 3.3.20):

,

3.3.1n0.1 3.3.1 , , , , 2.56

n12345678910Kn01 9.954.903.743.403.203.103.002.932.892.852.56

3.3.3 , , re, , , re0, , , , , , , re

rebc, bc , bc, , , , rere, , Nre,

Nbc,, 3.3.3, , bc

re, N, , re, , , , L, , , , , ,

3.3.4 , , , ,

re, N, , re, , , , L, , , , , ,

3.4

, , AuBW, , GBW=AufHfH, fLAu , , .

3.4.1 , (fH) 3.4.1(a) (b) RL Z be= rbe =

Ct=Cbe+CM=Cbe+(1+gmRL)

Rt=r ber bb= (3.4.3)

(3.4.4)

H= , fH= (3.4.7) 3.4.2

RL=Rc fH(3.4.7)

GBW= 3.3 3.4.2, V1V2, IEQ=1mA0=100, rbb=50, Cbc=2pF, fT=200MHzRC=2 kRL=10 k : (3.2.2)(3.2.1)

re=

gm R be=(1+o)r e=(1+100)26=2.6 k RL=Rc RL=2k5k1.43k CM=(1+gmRL)Cb'c=(1+0.041.43103)210-12116pF C be= (3.4.2)(3.4.3)

GBW=AudfH=5622.46106=1.26109

3.4.2, Rb, 3.4.3, 3.4.1(b), 3.4.3, Rbrbb, Rb=Rb+rbb' (3.4.10) Rt=r beRb (3.4.11)

, , ,

3.4.2 , , , 1 -, 3.4.4 , , ,

2.4.4

CM=(1+gmR'L)Cbc (3.2.1) (3.2.1), C bc, (1+gmRL) Cbc, , M , , , bc, , , 3.4.4,

, , L, M, , , , , 3.4.5, , z

V1V3V4V2V6(V5), b2, b1, V8V4 V5, V1V2V3 V6 b1, b2, V7V3V6, V1V2 V4V5, b1b2, , e, , , MHz

, 3.4 2.3, 2.4(a) (b)'L=15k : 3.4(c), (2.4.5):

re

, f1

gm , , 4 , , , , , , 3.4.6

, , , , , 3.4.7, V1 V2, V3V6(V5V6), V7V11,

, 10, , MHz, MHz MHz 3.4.8F733RR, , V1V2, , R, V1V25, R3, R4, R5, R6R, , , ,

3.5 3.3.3 , , LC, , , , , , ,

, , , , , , 3.5.1 , ,

, urface coustic ave ilter, , , , , , 2060, , , 3.5.2

, , , , , , , , , , ,

, a b MHzHz, %%, , , 2.5.3,

3.6 , , , , , , , ,

3.6.1 , , , , , , , ,

, , , , , , ,

k=1.3810-23JK (3.6.3)k, , I2n=SI(f)BW =4kTG BW (3.6.4) U2n=SU(f)BW=4kTR BW (3.6.5), , 3.6.1

, , , 2.5 kK, k : U2n=4kTRBW=41.3810-23290510103105 8.1610-102 I2n=4kTBWR=41.3810-23290105510103) 3.1410-212

3.6.2 , rbb , , , : I0 (3.6.6)

0, -19 , 0, , , , , , , , , , , , , 3.6.6

, , k, ,

3.6.3 , , , SI(f)=4kT (3.6.7) SI(f)=2qIg (3.6.8) m, g

3.6.4 , , Ls, , PA= (3.6.9) , ,

R:PnA= (3.6.10)

, , , PAAoAi:3.6.11

, , , 3.6 2.6 : Ai , : , s, :

PAo=, GPA= , , ,

3.6.5 , , , SNR(Signal to Noise Ratio), SNR= (3.6.12)sn

, , , ,, , NF(Noise Figure), :3.6.13

, : NF=10lg (3.6.14) 3.6.13, , 3.6.13ni, , , ni

nis, s, , nos , , , ,

3.6.11 :nAn 3.6.16:3.6.153.6.163.6.173.6.18

3 3.6.19nAn, :nAn()pAk0 (3.6.20) , , nAn, 3.6.19

1 2 PA1 PA2, 3619, PA, nAo, : PnA0=PnAn1+PnAn2 (3.6.21)

nAn1(1)PA1k0 (2.6.22) nAn2(2)PA2k0 (2.6.23)

3.6.17,3.6.22, 3.6.233.6.21, 3.6.173.6.213.6.16, NF= (3.6.24)n, (n-1), n, (3.6.24)

(3.6.25) , , , , , , ,

, , , 3.6.10, ,kTBW, nAinAo, k,3.6.16

3.7 PA2., 2, 3, 1

, PA1 : ,

, :

3.7, , , , 3.6.25, , , ,

3.6.6 , e ese, , s0e, 3.6.2 3.6.2(3.6.17)(3.6.20) PnAo=PnAiGpA+PnAn=kT0BWG.GPA.NF 3.6.2b:

nAok(0e)PA (3.6.28) 3.6.273.6.28e: NF=1+ Te=(NF-1)T0 (3.6.29), e, e e, , , , ,

()() 3.6.7

2.

RS

3.6.8

3. 4. 5. 6.

3.6.9 1. 2.

3.7 , , LC , , , 3 dBBW, BW, , BW,

3dBBWBWG, 3dB, , 1(0dB) AGC (1) -3dBBWBWG (2) AuGp (3) AGCMAGC

(4) NF (5) (6) V+V- ()() , 3dB, , , ,

, , , , , , 3.4F733, F1550 Au22dB(), Gp25dB(60MHz), BW20MHz30MHz, 100MHz, MAGC22dB, V+=20V

F15503.7.1 , TA7680AP, TA7680AP , , 8 ,

2.7.2SAWFTA7680AP (38 MHz, 8 MHz), , SAWF(SAWF), TA7680AP , AGC, TA7680AP , TA7680AP, V1V3, V2 V4 V18V19, R43R44

, V18V19R45R46C1C2, , R47R48 , R1R2V1V2

3.8 (1) , Y, , Y, , , (2) Q, , , , LC

(3) , , (4) , (), ()