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调频广播音质优美,悦耳动听,已被越来越多的人所欣赏。调频广播为什么比调幅广播好听呢?这还得先从调幅广播谈起。一、调幅广播图1是一种简单调幅发射机的方框图。调幅广播是用高频振荡器产生幅度相等的高频振荡信号(见于图1a),经放大后输送到高频功率放大级,等待利用。调幅广播还要有一个音频信号源(如讲话、录音磁带、
FM radio sound quality, sweet and pleasant, has been more and more people enjoy. Why FM radio is better than AM radio? This has to be talked about from AM radio. I. AM Broadcasting Figure 1 is a block diagram of a simple amplitude modulation transmitter. AM broadcast is the use of high-frequency oscillator to produce high-frequency oscillation signal of equal amplitude (see Figure 1a), amplified and delivered to the high-frequency power amplifier stage, waiting to be utilized. AM radio also have an audio source (such as speech, audio tapes,