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SGMICRO applies for patents on jitter frequency circuits and switching power supply circuits to reduce peak electromagnetic interference at fixed frequencies

Article Source：Tianyancha | Author：Tianyancha | Issuing Time：2024.06.05
On June 4, 2024, according to Tianyancha's intellectual property information, SGMICRO has applied for a patent titled "A TikTok Circuit and a Switching Power Supply Circuit", with publication number CN202410324415.8 and application date of March 2024.



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The patent abstract shows that the jitter frequency circuit and switching power supply circuit provided in this disclosed embodiment include: a triangular voltage generation module, a target clock signal generation module, and a first capacitor. The target clock signal generation module includes a second capacitor, with the first end of the first capacitor electrically connected to the first node and the second end of the second capacitor electrically connected to the second node; The triangle voltage generation module compares the voltage of the first node with the target reference voltage, and controls the charging and discharging of the first capacitor based on the relationship between the voltage of the first node and the target reference voltage, in order to generate a triangle voltage on the first node; The target clock signal generation module compares the voltage of the second node with the triangle voltage, and generates the target clock signal based on the relationship between the voltage of the second node and the triangle voltage. The frequency of the target clock signal varies periodically to generate a target clock signal with periodic frequency variation, reducing peak electromagnetic interference at a fixed frequency.
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