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传统的高保真放大器均采用对电压和电流模拟量进行线性放大的甲类、甲乙类或乙类放大器。随着模拟放大器电路技术的日趋成熟,高保真放大器的性能也不断提高。目前模拟放大器的放音效果已达到很高的水平,但也存在一些问题属于模拟放大器技术固有的和无法解决的。例如,放大器的交越失真是普通乙类和甲乙类互补推挽放大器不易解决的问题,甲类放大器虽然可基本消除交越失真,但其效率非常低。即使在额定输出功率时,实际上也仅能达到30％左右。由于耗能很
Traditional high-fidelity amplifiers are used to amplify the linear analog voltage and current analog A, B class or B amplifier. As analog amplifier circuit technology matures, the performance of high-fidelity amplifiers is also constantly improving. At present, analog amplifier amplifier playback has reached a very high level, but there are also some problems inherent in analog amplifier technology and can not be resolved. For example, the crossover amplifier distortion is a common Class B and Class B complementary push-pull amplifier is not easy to solve the problem, although Class A amplifier can basically eliminate crossover distortion, but its efficiency is very low. Even in the rated output power, in fact, only about 30%. Because of energy consumption