試題詳解

38 如圖所示差動對電路，電晶體之 β = 100，r_o →∞，R_C = 4 kΩ，I = 2 mA，V_CC = -V_EE = 10 V，取 V_BE(on) = 0.7 V，V_CE(sat) = 0.3 V，V_T = 25 mV，當 v_B1 = v_B2 = 0 時，i_C1(i_C2)之值約為何？
(A)0 mA
(B)0.01 mA
(C)1 mA
(D)2 mA