CIRCUIT STRUCTURE FOR EFFICIENTLY DEMODULATING FSK SIGNAL IN WIRELESS CHARGING DEVICE

• Main Authors: WANG, Congying, ZHAO, Qiyi, SHU, Wenli
• Format: Patent
• Language: English; French; German
• Published: 29.04.2020
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

A circuit structure for efficiently demodulating an FSK signal in a wireless charging device, comprising a data sampling module, a period point counting module, a data distribution module, and a period point processing module. An input terminal of the period point counting module is connected to an output terminal of the data sampling module; an input terminal of the data distribution module is connected to an output terminal of the period point counting module; an input terminal of the period point processing module is connected to an output terminal of the data distribution module. By means of the circuit structure, efficient demodulation can be implemented by a demodulation circuit using only 2M clock processing data; even if an input signal is poor, demodulation can be performed accurately; the unpacking rate is greatly improved. Moreover, left and right processing flows are the same, and the circuit is a time-division multiplexing circuit; thus, the circuit overhead is reduced, FSK signal demodulation is more efficient, and the circuit structure can be widely applied.