Power carrier signal identification circuit, method and integrated circuit chip

The present application discloses a power carrier signal identification circuit, which includes that the amplitude change and duration of the voltage signal on the power line are identified when the signal is transmitted on the power line, and then decoded into corresponding data to reduce the dependence of signal identification on the power supply voltage, increase in transmission distance will not reduce the signal recognition rate, thereby reducing requiremtns on the system power. 本申请公开一种电力载波信号识别电路，其包括信号在电源线上传输时，对电源线上电压信号的幅度变化和持续时间进行识别，进而解码成相应数据，减少信号识别时对电源电压的依赖，传输距离增加也不会减低信号识别率，从而降低对系统电源的要求。