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近代对宽带多级放大器的分析和设计颇为重视,这首先是将放大器设计成个型化的和最佳的.最佳放大器被认为是在这种放大器中,当给定上限频率值时能得到最大的放大系数.在设计特别是采用晶体管的多级放大器时,选择这种或那种高频补偿电路常常是无根据进行的.较常的是按照得到一级最大放大系数的条件加以选择,而不考虑振幅频率特性,这是不正确的.在许多情况下,高频补偿电路的效率相同,振幅频率特性就不同,因而导致N级放大器的上限频率不同,尽量一级放大器的上限频率相同.
Modern emphasis is placed on the analysis and design of wideband multistage amplifiers, which are primarily the design of amplifiers as being individualized and optimized. The best amplifier is considered in this amplifier when given the upper limit frequency value To obtain the maximum amplification factor .In the design of multi-stage amplifiers, especially with transistors, the choice of one or the same type of high-frequency compensation circuit is often unfounded.Often it is in accordance with the conditions to get a maximum amplification factor to choose , Regardless of the amplitude and frequency characteristics, which is not correct.In many cases, the same high-frequency compensation circuit efficiency, amplitude and frequency characteristics are different, resulting in the upper limit of N-stage amplifier frequency is different, try to maximize the upper limit of the amplifier frequency the same.