Il A 图P6-13 1=-mB A 2(R3+r2) 2=1+ RB.U 0 R1 R yf
f f u f i i u u u u b e u U U A R U I R U I A A A R R A R r R A = − = = = + = + = − 0 9 0 1 1 2 7 8 2 1 2 1 , , , 1 , 2( )
18V 10k C A 10k 60k Us IkR 图P6-14 图H6-15
1.6 10k 20~39k 20W c 20 20g 20 33~68k 24-2 sk 390 20 100 图P6-16 R& Ucc R (a) 图P6-17
6-16 U0=lc3(R3‖R‖R),U=l3R3 6-17 RI (a a R R8+Rs+r3 6)1 R U
f e u f f C L U U U I R R R U I R A = = = 0 3 8 9 3 3 0 ( || || ), , 6-16 6-17 S f ufb S S i e C f ufa U U A R U I R U b I I R R R R R R I U U a A = − = = + + = = 0 1 0 4 3 8 5 3 8 7 4 0 ( ) , , （ ）