【摘要】 该文从理论和实验两方面研究了低温下双极晶体管基极电流非理想因子 n 的作用和收集极电流 Ic 与基区杂质浓度 N_B 的关系,结果表明:(1)n 因子具有负温度系数,低温下其值可大于2;(2)I_c 随 N_B 的上升而上升,这与常温理论截然相反。更多还原

【Abstract】 In this paper , low temperature characteristics of the nonideal component n of the base current in bipolar transistors are studied and a relation between the collector current Ic and the doping ooncentration in the base NB is presented both theoretically and experimentally. The results indicate that. (1) the nonideal component n has negative temperature coefficient, which will become larger than 2 at low temp-erature; (2) the collector current Ic continues to increase with increasing NB, which is opposite to that at room temperature更多还原