论文部分内容阅读
三、频率特性参数测量表征晶体管频率的参数有f_α、f_β、f_r和f_max,在这里着重介绍特征频率f_r的意义、测量原理和方法.1.晶体管特征频率f_r及其测量方法在晶体管中,当载流子从发射极注入到集电极输出需要一定时间,这个时间通常称为“渡越时间”.渡越时间愈短,表明晶体管工作的频率愈高.渡越时间与特征频率f_r之间的关系为:
Third, the frequency characteristics of the parameter measurement Characterization of the transistor frequency parameters f_α, f_β, f_r and f_max, here focuses on the meaning of the characteristic frequency f_r measurement principle and method .1 transistor characteristic frequency f_r and its measurement method in the transistor, when The time it takes for charge carriers to flow from the emitter to the collector output is usually referred to as the “transit time.” The shorter the transit time, the higher the frequency at which the transistor operates. The time between the transit time and the characteristic frequency f_r The relationship is: