Abstract: A detection method for a capacitive touch device is provided. The detection method includes steps of: driving an Mth driving line among an m driving lines of the capacitive touch device, wherein M is a natural number smaller than or equal to m and greater than 1; selecting a plurality of sensing lines among n sensing lines; obtaining a plurality of sensing values by detecting voltage changes at the selected sensing lines; determining whether to perform a noise reduction operation on the sensing values; if yes, calculating respective differences between the sensing values and a baseline value, and generating a noise correction value corresponding to the sensing values by performing a statistical computation on the differences; and correcting the differences according to the noise correction value.

Abstract: A power factor correction device includes a rectifier for converting an AC input voltage into a DC input voltage, an output module for generating and outputting a DC output voltage, an intermediate inductor coupled between the rectifier and the output module, a power switch for controlling an inductor current of the intermediate inductor and generating a source voltage, a reset module for generating a reset instruction according to the DC input voltage, the DC output voltage and the source voltage, an SR flip-flop for outputting a latch result according to a set instruction and the reset instruction, and a set module for generating the set instruction in response to variation of the intermediate inductor or variation of the latch result.