Tencent Technology (shenzhen) Company Limited

Navitas Semiconductor Limited

Mingqiang Li

Qi Wang

Xiaobing Wang

Hao Zhou

Liang Huang

Yun Zhou

Weijing Du

Jianping Zhu

Xiucheng Huang

Ziqun Huang

Jiahui Du

Jiatao Xu

Zhiyuan Tan

Systems and methods for improving radiated electromagnetic interference (EMI) in switching power supplies are disclosed. In one aspect, a converter circuit includes a transformer having a primary winding and a secondary winding, the primary winding extending from a first primary terminal to a second primary terminal, a first switch having a first gate terminal, a first source terminal and a first drain terminal, wherein the first drain terminal is coupled to the first primary terminal, and the first source terminal is coupled to a power source, and a capacitor having a first capacitor terminal and second capacitor terminal, wherein the first capacitor terminal is coupled to the power source. A ferrite bead is coupled between the first primary terminal and the first drain terminal, and a capacitor network is coupled in parallel with the ferrite bead and arranged to reduce radiated electromagnetic interference of the converter circuit.

Systems and methods for improving radiated EMI in switching power supplies

Disclosed are an email sending and receiving method and a terminal. The sending method comprises: submitting an email text, and packaging, by coding, the email text and a storing ID of an enclosure uploaded in advance; determining whether an email receiver is a local domain account, and if yes, storing the email into a storage server; otherwise, obtaining the enclosure from the storage server according to the storing ID of the enclosure, recoding the enclosure and the email text into an email and then sending the email to an out-of-band server.

Email sending and receiving method and terminal

Growing community of inventors

Shenzhen, China

Mingqiang Li