AM-PM转换失真是什么啊

keith_no1

AM-PM转化失真是什么意思啊。好像在功放里一直可以看到啊。但是不知道具体含义

ewave

<P>AM-to-PM conversion is usually defined as the change in output phase for a 1-dB increment in the input power to an amplifier, expressed in degrees/dB.</P><P>An ideal amplifier would have no interaction between its phase response and the level of the input signal.</P><P>AM-PM conversion is critical in systems based on phase modulation, such as quadrature phase shift keying(QPSK),since phase distortion can cause signal degradation in analog systems and increased bit-error rate(BER) in digital systems.</P>