说明：  双乙类功率放大器设计应用，包括放大器的设计原理，测试及技术指标的测量，标准参考电路等，对放大器的学习和设计人员很大的帮助，对初学者也有很合适。
(Double-B power amplifier design applications, including amplifier design principles, testing and measurement specifications, the standard reference circuit, the amplifier design of the study and very helpful staff, also very suitable for beginners.)