Pi-Fen
Pi-Fen Chen, Hsinchu City TW
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20090261914 | CRYSTAL OSCILLATOR CIRCUITS - An oscillator circuit. A gain stage element is coupled between both terminals of the crystal. The gain stage element provides a transconductance for oscillation according to a current provided by a current source, and outputs a periodic signal through an output terminal. A bias element is coupled between an input terminal and the output terminal of the gain stage element to bias the gain stage element. A first capacitor is coupled to the input terminal of the gain stage element. A second capacitor is coupled to the output terminal of the gain stage element. A controller detects the periodic signal, and adjusts the current when the periodic signal is obtained. | 10-22-2009 |
Pi-Fen Chen, Hsinchu County TW
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20130113415 | METHOD AND APPARATUS FOR PERFORMING SYSTEM POWER MANAGEMENT - A method and an apparatus for performing charging port detection control are provided, where the method is applied to an electronic device, a communication port of the electronic device has a functionality of obtaining power from an external power source for the electronic device, and a power path switching unit of the electronic device is arranged to control electrical connection between a system within the electronic device and a battery of the electronic device. The method may include the steps of: performing charging port detection; and control operation(s) according to the charging port detection. For example, the method may include: controlling the power path switching unit to have different configuration according to the charging port detection in order to charge the battery with different charging profiles; and detecting the system voltage level during charging for switching from the constant current mode to the constant voltage mode. | 05-09-2013 |
20130119922 | METHOD AND APPARATUS FOR PERFORMING CHARGING PORT DETECTION CONTROL - A method and an apparatus for performing charging port detection control are provided, where the method is applied to an electronic device, and a communication port of the electronic device has a functionality of obtaining power from an external power source for the electronic device. The method may include the steps of: detecting whether an output voltage level of a battery of the electronic device reaches a predetermined threshold value; and control operation(s) according to whether the output voltage level reaches the predetermined threshold value. For example, the method may include: when it is detected that the output voltage level is less than the predetermined threshold value, pre-charging the battery with a predetermined pre-charging current level to make the output voltage level reach the predetermined threshold value, and then controlling a detection path switching unit to electrically connect data terminal(s) of the communication port to a charging port detection circuit. | 05-16-2013 |
Pi-Fen Lin, Keelung TW
Patent application number | Description | Published |
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20110041462 | INFLATABLE DEVCIE WITH AIR BAG AND A PACKAGING METHOD BY USING THE SAME - An inflatable device with air bag includes an air bag, two first assembly portions and two second assembly portions. The two first assembly portions are respectively fastened at two sides of the air bag, and the two second assembly portions are respectively fastened at another two sides of the air bag. The two second assembly portions correspond to the two first assembly portions. Thereby, by utilizing the assembly portions to repeatedly assemble the air bags, the dimension of the inflatable device with air bag is quickly expanded to a proper size to wrap the objects with different sizes. It prevents the object from being impacted, and achieves the waterproof effect and the moisture-proof effect. A packaging method by using the inflatable device with air bag is also disclosed. | 02-24-2011 |
Pi-Fen Lin, Keelung City 200 TW
Patent application number | Description | Published |
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20110039604 | DECT WIRELESS HANDS-FREE COMMUNICATION APPARATUS - The present invention provides a DECT (Digital Enhanced Cordless Telecommunication) wireless hands-free communication apparatus which includes a DECT host and a DECT earphone, wherein the DECT host is coupled with the Public Switch Telephone Network (PSTN) and configures an earphone receiving recess, which configures with a magnetic device mounted on the DECT host. The DECT earphone wirelessly communicates with the DECT host via the digital enhanced cordless telecommunication technique and the DECT earphone is detachable while it is attached to the earphone receiving recess The DECT earphone configures a magnetic conductive device, wherein the magnetic conductive device magnetically attracts to the magnetic device while the DECT earphone is close to the earphone receiving recess, whereby the DECT earphone electrically connects with the DECT host. | 02-17-2011 |