下图中, T 1 ~T 4 的 β =120 , r b =200 Ω,r ce3 =50kΩ , r be =5.4kΩ , R c1 =R c2 =R c =10kΩ , R e3 =R e4 =100Ω , R=4.3kΩ , R b1 =R b2 =R b =1kΩ , +V CC =+12V,-V EE =-6V , V BE =0.7V 。计算该电路的差模电压增益 A VD1 。
【简答题】B A 17-year-old boy, caught sending text messages in class, was recently sent to the vice principal's office at Millwood High School in Halifax, Nova Scotia. The vice principal, Steve Gallagher, told ...