Power supply device and pulse frequency modulation method

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United States of America Patent

PATENT NO 11569730
APP PUB NO 20210257899A1
SERIAL NO

17155123

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Abstract

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A power supply device includes a pulse frequency modulation controller circuitry and a cycle controller circuitry. The pulse frequency modulation controller circuitry is configured to adjust a transiting speed of a first signal according to at least one control bit, and to compare the first signal with a first reference voltage to generate a second signal, and to generate a driving signal to a power converter circuit according to an output voltage, a second reference voltage, and the second signal, in which the power converter circuit is configured to generate the output voltage according to the driving signal. The cycle controller circuitry is configured to detect a frequency of the driving signal according to a clock signal having a predetermined frequency, in which the predetermined frequency is set based on a frequency range capable of being heard by humans.

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Patent Owner(s)

Patent OwnerAddress
REALTEK SEMICONDUCTOR CORPORATIONNO 2 INNOVATION ROAD II HSINCHU SCIENCE PARK HSINCHU 300

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Chang, Chun-Fu Hsinchu, TW 23 116
Chen, Shih-Chieh Hsinchu, TW 56 445
Li, Liang-Hui Hsinchu, TW 14 14
Liu, Hung-Wan Hsinchu, TW 1 0
Wang, Shih-Cheng Hsinchu, TW 69 288

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