R1 = R2 =Rs =Rb => R. Ra = 2R. [ (v負- Vs) / R ] + [ (V負- 0.7) / R ] + [(V負- 0.7 -Vo)/2R] = 0. 導通條件: (1/2 )Vo - (1/3)Vo > 0.7.
確定! 回上一頁