210(1) VCC-UCEQ=2mA R Rh=Cc -UBEQ ≈565kQ (2) Au B RL RL=lkE R。R1 1R1=1.5kg2 UCEO -U 211空载时,Uom ≈3.28V 2 R1=3kΩ时,U 12V 212②①②①③ 213(1)静态及动态分析 Vcc = 2v I ImA RbI+ rb R+r ≈1q1A 1+B UCEQ VCC -lEQ(R+Rr+re)=5.7V 26mV rbe r+(1+ B) ≈2.73kQ B(R∥R1) 7.7 rbe +(+B)R R1=Rb1∥Rn2∥[he+(l+B)R]≈37kg2 R。=R=5kg2 (2)R增大,R≈4lk9;A减小,A≈-1.92 2.14 Q: IBO R+R2+(+B)re CQ=bL UcEOSVcc-(1+B)IBoRe ∥R2 R1=le∥R1R=R2∥R7 2.10 （1）   − = = = = − = 565k 20μA 2mA BQ CC BEQ b CQ BQ c CC CEQ CQ I V U R I I R V U I  （2） + = =  = − = − = − =  1 1.5k 1 1 1k 100 L c L ' L be ' L i o R R R R r R A U U Au u    2.11 空载时， 3.28V 2 CEQ CES om  − = U U U 2.12V 2 3k ' CQ L L =  o m =  I R R 时，U 2.12 ② ① ② ① ③ ③ ② ① ③ ① ③ ③ ① ③ ③ 2.13（1）静态及动态分析： = =  = + +    − + + = − = + +     − + + = + =  + −  = = +  5k [ (1 ) ] 3.7k 7.7 (1 ) ( ) 2.73k 26mV (1 ) 10μ A ( ) 5.7V 1 2V 1mA o c i b1 b2 be f be f c L E Q be bb' CEQ E Q c f e E Q BQ f e BQ BEQ CC E Q b1 b2 b1 BQ R R R R R r R r R R R A I r r U V I R R R I I R R U U V I R R R U u CC      ∥ ∥  ∥ (2) Ri 增大，Ri≈4.1kΩ； Au  减小， Au  ≈－1.92。 2.14 CQ BQ CEQ CC BQ c 1 2 c CC BEQ BQ (1 ) (1 ) : I I U V I R R R R V U Q I    = = − + + + + − = i be 1 o 2 3 be 2 3 R r R R R R r R R Au ∥ ∥ ∥ = − = = 