Abstract: A hinge device and a keyboard dock and a portable electronic device having the same are provided. The hinge device includes a body, a torsion generating part, a rotating part and a second wedging unit. The torsion generating part is pivotally connected to the body and has a first wedging unit. The rotating part is pivotally connected to the body. The second wedging unit is assembled to the rotating part and moved along with the rotating part. The first wedging unit and the second wedging unit are wedged together or separated from each other while the rotating part rotates relative to the body along a first axis. The body can rotate along a second axis relative to the torsion generating part while the first wedging unit and the second wedging unit are separated from each other. The first axis is vertical to the second axis.

Abstract: A hinge device and a keyboard dock and a portable electronic device having the same are provided. The hinge device includes a first body and a second body. The first body is configured to be pivotally connected to a first object. One side of the second body is pivotally connected to the first body, and another side of the second body is configured to be pivotally connected to a second object. The first body rotates around a first axis relative to the first object. The second body rotates around a second axis relative to the first body. The second body rotates around a third axis relative to the second object. The first axis is perpendicular to the second axis, and the second axis is parallel to the third axis.

Abstract: A hinge device and a keyboard dock and a portable electronic device having the same are provided. The hinge device includes a body, a torsion generating part, a rotating part and a second wedging unit. The torsion generating part is pivotally connected to the body and has a first wedging unit. The rotating part is pivotally connected to the body. The second wedging unit is assembled to the rotating part and moved along with the rotating part. The first wedging unit and the second wedging unit are wedged together or separated from each other while the rotating part rotates relative to the body along a first axis. The body can rotate along a second axis relative to the torsion generating part while the first wedging unit and the second wedging unit are separated from each other. The first axis is vertical to the second axis.

Abstract: A pad circuit includes a pad, a gate driving circuit, a voltage selection circuit, and an ESD detection/avoiding circuit. The gate driving circuit is used to discharge the ESD induced current. The ESD detection/avoiding circuit is used to isolate the ESD induced voltage. The voltage selection circuit selects a higher voltage from a power/ground terminal and the pad and outputs it to the gate driving circuit, so that the pad circuit can be used for the programming and 1/0 operations.

Abstract: A portable storage device. The portable storage device includes a main body and a battery dock. The main body has a connector, a protective element and at least one first power connection portion. The connector and first power connection portion are disposed on the main body. The connector is electrically connected to the data transfer port of an electronic device. The protective element is connected to the main body to protect the connector. The battery dock is connected to the main body and has at least one second power connection portion corresponding to the first power connection portion. The second power connection portion is connected to the first power connection portion when the battery dock is connected to the main body.

Abstract: A portable storage device. The portable storage device includes a main body and a battery dock. The main body has a connector, a protective element and at least one first power connection portion. The connector and first power connection portion are disposed on the main body. The connector is electrically connected to the data transfer port of an electronic device. The protective element is connected to the main body to protect the connector. The battery dock is connected to the main body and has at least one second power connection portion corresponding to the first power connection portion. The second power connection portion is connected to the first power connection portion when the battery dock is connected to the main body.