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如果能使普通晶体管成为超线性放大元件,并与电路设计上的离散性基本无关,方便地应用于各频域,这是线路设计者所期望的。尤其是改变H_m/I_o直流特性(对应于h_21),将其复杂的函数传输特性变成在应用区域里为一直线方程所表示的常数K,可能会对放大器件的概念有一个变革。对交流放大器而言,如果以群波作为输入,按照过去一般理论(或是用仪器测出),认为品体管放大器的谐波失真系数(KF)小于0.05%,这比起电子管电路的KF似乎提高了二个数量级,但在实际应用中两者相比较时,前者又远不如后者。这样的实际问题国际上也早已注意到。到七十年代中期,芬兰的Otala等人提出用瞬态互调
If the ordinary transistor can become a super-linear amplifier components, and the circuit design has nothing to do with the discrete, easy to apply to each frequency domain, which is expected by line designers. In particular, changing the H_m / I_o DC characteristic (corresponding to h_21) and changing its complex function transfer characteristic to a constant K expressed by a straight line equation in the application area may change the concept of an amplifier device. For AC amplifiers, if the group wave is used as input, the harmonic distortion factor (KF) of the amplifier is considered to be less than 0.05% according to the general theory (or measured by the instrument) in the past, which is lower than that of the tube circuit KF Seems to be increased by two orders of magnitude, but in the actual application of the two compared, the former is far less than the latter. Such practical problems have long been noted internationally. By the mid-seventies, Finland's Otala et al. Proposed transient intermodulation