Abstract: Provided is an electronic device, including a main body, a first functional module, a linkage mechanism, and a second functional module. The first functional module is slidably provided on the main body between a first position and a second position. The linkage mechanism is provided on the main body and is connected to the first functional module. The second functional module is linked to the linkage mechanism and is provided on the main body in a turnover manner, in which when the first functional module is located at the first position, the second functional module is covered by the first functional module, and when the first functional module moves to the second position and the second functional module is exposed, the second functional module is driven by the linkage mechanism to be turned up.

Abstract: Provided is a protection cover, applicable to an electronic device. The protection cover includes a cover body and at least one sensing module. The cover body has a view window, wherein the cover body is suitable for covering a display surface of the electronic device and exposing a part of the display surface via the view window. The at least one sensing module is provided on the cover body and aligns with the view window, wherein the at least one sensing module is suitable for sensing at least one object in the view window to generate a touch signal, and transmitting the touch signal to the electronic device.

Abstract: An electronic apparatus includes an electronic device and a base. The base includes a base body and a connection structure. The connection structure includes a cover and at least one pivot assembly. The pivot assembly is pivoted between the base body and the cover, such that the cover is adapted to pivot between a closed state and an opened state relatively to the base body. The cover and the base body cover the pivot assembly. The cover has a connection segment. When the electronic device is assembled to the base, the connection segment is adapted to be inserted into a slot of the electronic device.

Abstract: A hinge module including a fixing member, a moving assembly, and a torque member is provided. The moving assembly includes a bracket and an axis body protruding from the bracket. The torque member includes a first end portion and a second end portion opposite to each other. The first end portion is fixed to the fixing member. The second end portion includes a lunular shape axle sleeve with an opening. The lunular shape axle sleeve is rotatably sleeved around the axis body for providing friction so as to form torques while the axis body is rotated relative to the lunular shape axle sleeve. The lunular shape axle sleeve has a gradual changed thickness. An electronic device having the hinge module is further provided.

Abstract: A portable electronic device includes first body and second body pivoted to the first body. The first body includes casing, supporter, first magnetic component and torsion component. The casing includes accommodating trench and first trench. First lateral of the supporter is pivoted to the casing via the torsion component, and second lateral of the supporter includes notch. When the supporter is located in the accommodating trench and the first magnetic component extends into the notch, the supporter is positioned inside the accommodating trench by the first magnetic component, and the torsion component stores elastic potential energy. When the second body rotates close to the first body, the first magnetic component exits the notch due to magnetic repulsive force of second magnetic component of the second body, and the torsion component releases the elastic potential energy so that the second lateral of the supporter rotates out to support the second body.

Abstract: An amplifier circuit that includes a first power amplifier configured to drive a load and a second power amplifier configured to drive the load through an impedance step-up network. The impedance step-up network is connected to an output of the second power amplifier. The impedance step-up network is configured to switch into a first mode to present an increased impedance to the first power amplifier, and switch into a second mode in which the impedance step-up network steps-up an impedance seen by the second power amplifier looking into the impedance step-up network.

Abstract: A portable electronic device includes a first body and a second body. The first body includes a casing, a supporter, a first magnetic component and a torsion component. The casing includes an accommodating trench and a first trench communicated with the accommodating trench. A first lateral of the supporter is pivoted to the casing via the torsion component, and a second lateral of the supporter includes a notch. The magnetic component is slidably disposed in the first trench. The second body is pivoted to the first body and includes a second magnetic component. When the supporter is located in the accommodating trench and the first magnetic component extends into the notch, the supporter is positioned inside the accommodating trench by the first magnetic component, and the torsion component stores elastic potential energy.

Abstract: An amplifier circuit that includes a first power amplifier configured to drive a load and a second power amplifier configured to drive the load through an impedance step-up network. The impedance step-up network is connected to an output of the second power amplifier. The impedance step-up network is configured to switch into a first mode to present an increased impedance to the first power amplifier, and switch into a second mode in which the impedance step-up network steps-up an impedance seen by the second power amplifier looking into the impedance step-up network.

Abstract: A portable electronic device includes a first body and a second body. The second body includes a processing unit, and a first touch panel, a second touch panel, a keyboard and at least one detecting module electrically connected to the processing unit, respectively. The keyboard is slidably disposed above the second touch panel, and the detecting module is adapted to detect a position of the keyboard. When the keyboard is located at a first position, the keyboard module covers the second touch panel, and the detecting module transmits a first signal to the processing unit so that the first touch panel is turned on. When the keyboard is located at a second position, the keyboard exposes the second touch panel, and the detecting module transmits a second signal to the processing unit so that the first touch panel is turned off. A touch panel controlling method of the portable electronic device is further provided.

Abstract: A portable electronic device and a control method thereof are provided. The method is adapted to a portable electronic device including a rotatable element, a fixed element, a screen, a processor, a switch module with at least two protruding elements, and fixed points. The rotatable element is nearby the fixed element. The protruding elements and the fixed points are facing to each other and configured at one and the other of the rotatable element and the fixed element. The processor is coupled to the switch module and the screen. The method includes to display a default user interface corresponding to a default mode on the screen, to determine a corresponding mode according to all press states of each protruding element in the switch module by the processor when the rotatable element is rotated due to an external force applied thereto, and to display a corresponding user interface on the screen.