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一、输出级工作类别的选择在分析音频功放的小信号级时,我们在电路上所采取的措施,每一项都只需对付一种失真,其原因在于这些小信号的传递特性是单调的,且通常工作于 A 类(甲类)状念。但对于输出级而言,则处于对经济性与温升问题的考虑,大多数的输出级皆工作于 B 类(乙类)状态。这样,势必还要涉及到交越失真(功放设计中最棘手的问题)与高频开关效应等问题,从而使音频功放的输出级更加复杂了。
First, the choice of the output stage work category In the analysis of the audio amplifier’s small signal level, the measures we take on the circuit, each one only deal with a distortion, the reason is that these small signal transfer characteristics are monotonous , And usually works in Category A (Class A) notation. However, for the output stage, the issue of economy and temperature rise is considered. Most of the output stages work in the category B (Category B) state. In this way, it is bound to involve crossover distortion (amplifier design of the most difficult issues) and high frequency switching effects and other issues, so that the audio amplifier output stage more complicated.