Abstract: A signal testing device and a signal testing method are provided. The method includes: obtaining, through a probe, a first frequency response corresponding to a test fixture and a device under test (DUT); obtaining, through the probe, a second frequency response corresponding to the test fixture; and generating a frequency response corresponding to the DUT according to the first frequency response, the second frequency response, a de-embedding algorithm, and an empirical mode decomposition algorithm.

Abstract: A printed circuit board is provided. The printed circuit board includes N power layers and a first via group. The N power layers are arranged in parallel and spaced from each other. The first via group includes M rows of vias which are disposed through the N power layers, where N and M are positive integers greater than 0. Each row of the M rows of vias is electrically connected to the first layer of the N power layers. A Pth row of the M rows of vias is further electrically connected to Q power layers of the N power layers respectively, where Q is a smallest positive integer greater than or equal to P((N?1)/M), and P is a positive integer less than or equal to M.

Abstract: An electronic apparatus includes a first member, a second member with a first point and a second point, a processing unit, and a drive device. The drive device pivotably connects the second member to the first member. The processing unit calculates a first distance between the first point and a third point and a second distance between the second point and the third point. The processing unit controls the drive device to rotate the second member relative to the first member according to the first distance and the second distance, thus the line defined by the third point and a middle point between the first point and the second point is perpendicular to the line defined by the first point and the second point.

Abstract: A support apparatus for supporting a device includes a fixing portion detachably secured to the device, and a rotating portion rotatably coupled to the fixing portion. The fixing portion defines an opening for allowing the support apparatus to be hand-held, and, when placed on a supporting surface, is capable of being rotated to form different viewing angles for the device. A device assembly using the support apparatus is also provided.

Abstract: A support apparatus for supporting a device includes a fixing portion detachably secured to the device, and a rotating portion rotatably coupled to the fixing portion. The fixing portion defines an opening for allowing the support apparatus to be hand-held, and, when placed on a supporting surface, is capable of being rotated to form different viewing angles for the device. A device assembly using the support apparatus is also provided.

Abstract: The present disclosure provides an electronic device having rotary input members. The device includes a substantially cylindrical main body, at least one hollow rotary input member rotatably connected to the main body, at least one pair of pads including two pads spaced from each other, arranged on the main body and beneath the at least one rotary input member, at least one selection contact arranged on an internal surface of the at least one rotary input member, and a processing unit. When a closed loop includes a pair of pads, a selection contact and the processing unit is formed, the processing unit determines input characters according to a relationship table.

Abstract: A password authentication method applied to an input recognition device with a touch sensitive screen, the password authentication method comprises defining and displaying at least one image according to the movement of an object touching on a touch sensitive screen, detecting a final position of the at least one image, and judging whether the at least one image and the final position thereof match a predetermined password or not; and if so entering an unlocking mode.

Abstract: The present disclosure provides an electronic device having rotary input members. The device includes a substantially cylindrical main body, at least one hollow rotary input member rotatably connected to the main body, at least one pair of pads including two pads spaced from each other, arranged on the main body and beneath the at least one rotary input member, at least one selection contact arranged on an internal surface of the at least one rotary input member, and a processing unit. When a closed loop includes a pair of pads, a selection contact and the processing unit is formed, the processing unit determines input characters according to a relationship table.

Abstract: A collapsible electronic device includes a first part, a second part, a hinge, a control unit, and a driving unit. The second part is hinged on the first part, and the control unit is configured to generate a first driving command when receiving a power-on signal for the collapsible electronic device and a second driving command when receiving a power-down signal for the collapsible electronic device, and the driving unit is configured to pivot the hinge to a first predetermined angle when receiving the first driving command and to a second predetermined angle when receiving the second driving command.

Abstract: An electronic device with network access function includes an input unit, a storage unit, a wireless network unit and a processing unit. The processing unit includes a scheduling module, a determining module, an accessing module and a downloading module. The scheduling module is configured to receive input from user and schedule online tasks. The determining module is configured to determine when it is time to perform a scheduled task. The accessing module is configured to navigate for the location of the desired information according to the user input when it is time for the scheduled task, and the downloading module is configured to download the desired information according to the user input, and store the desired information in the storage unit.

Abstract: An electronic device includes a base, a display pivotably connecting to the base, a detecting unit, a processing unit, and a driving unit. The detecting unit is for detecting a positional relationship between the display and a user in front of the display. The processing unit is for generating an adjusting signal according to the positional relationship. The driving unit is for adjusting an opening angle defined between the display and the base according to the adjusting signal.

Abstract: An electronic device includes a main body. The main body includes a hook and a sliding button. The hook is connected to the sliding button. A first groove and a second groove are defined in the main body and communicate with each other to form a slot. The hook protrudes from the first groove and the sliding button protrudes from the second groove. The main body further includes a sensor, a processing unit and an alarm unit. The sensor is located on an inner wall of the slot. When the sliding button is slid, the hook moves along with the sliding button and comes in contact with the sensor. The sensor generates a sensing signal due to the contact with the hook. When the processing unit receives the sensing signal from the sensor, the processing unit controls the alarm unit to sound an alarm.

Abstract: An electronic apparatus includes a first member, a second member with a first point and a second point, a processing unit, and a drive device. The drive device pivotably connects the second member to the first member. The processing unit calculates a first distance between the first point and a third point and a second distance between the second point and the third point. The processing unit controls the drive device to rotate the second member relative to the first member according to the first distance and the second distance, thus the line defined by the third point and a middle point between the first point and the second point is perpendicular to the line defined by the first point and the second point.

Abstract: An electronic apparatus includes a main body, a cover, a driving device, a receiving unit, and a processing unit. The cover is pivotably connected to the main body. The driving device drives the cover to rotate relative to the main body between an open position and a closed position. The receiving unit receives a control signal from an input device. The processing unit directs the driving device to rotate the cover relative to the main body between the open position and the closed position according to the control signal.

Abstract: An electronic device with a password protection function is provided. The electronic device provides a password input area, which includes a number of sub-areas. Each of the sub-areas is designated a distinctive attribute, and is provided for inputting a single character. The characters and the attributes of the sub-areas are used to generate a login password according to a predetermined rule, thus the security of the login password is strengthened.

Abstract: A power supply voltage detecting circuit includes a voltage regulating circuit, a comparative circuit, a timer circuit, and a display circuit. The voltage regulating circuit provides a stable reference voltage to the comparative circuit. The comparative circuit compares the reference voltage with the voltage from the power supply. The comparative circuit is electrically connected to the display circuit via the timer circuit. The display circuit includes light emitting diodes for revealing a status of the voltage from the power supply. The timer circuit causes the display circuit to keep a light on when there has been an occurrence of abnormal voltage from the power supply until an operator resets it.

Abstract: An exemplary power supply circuit includes a comparator and two MOSFET transistors connected in parallel. The comparator has a non-inverting terminal connected to a reference voltage. Both gates of the MOSFET transistors are connected to an output terminal of the comparator, both drains of the MOSFET transistors are connected to a power supply, both sources of the two MOSFET transistors are connected to an inverting terminal of the comparator and act as an output of the power supply circuit.

Abstract: A power supply system for providing main power and standby power to peripheral electronic devices in a computer, comprises an input signal coming from a CPU of the computer; a driving device for receiving the input signal and generating a driving signal; a first power switch device connected with a first main power source and a first standby power source; and a second power switch device connected with a second main power source and a second standby power source. When the driving signal is transmitted into the first power switch device and the second power switch device, the first power switch device outputs the first main power source or the first standby power source in response to the driving signal to one of the peripheral electronic devices, and the second power switch device outputs the second main power source or the second standby power source in response to the driving signal to another one of the peripheral electronic devices.

Abstract: A power supply voltage detecting circuit includes a voltage regulating circuit, a comparative circuit, a timer circuit, and a display circuit. The voltage regulating circuit provides a stable reference voltage to the comparative circuit. The comparative circuit compares the reference voltage with the voltage from the power supply. The comparative circuit is electrically connected to the display circuit via the timer circuit. The display circuit includes light emitting diodes for revealing a status of the voltage from the power supply. The timer circuit causes the display circuit to keep a light on when there has been an occurrence of abnormal voltage from the power supply until an operator resets it.

Abstract: A signal transmitting circuit includes a driving circuit, and a plurality of receiving circuits receiving signals transmitted from the driving circuit. Each of the receiving circuits is coupled to the driving circuit consecutively via a transmission line. A voltage regulator is coupled to the driving circuit and the receiving circuits and provides power to the driving circuit and the receiving circuits. A number of capacitors are coupled between the voltage regulator and the ground for filtering the noise of the power output from the voltage regulator. The capacitors between the voltage regulator and the north bridge chipset filtering the noise of the power output from the voltage regulator maintain signal integrity as the terminal resistor does. It is of advantage that the signal transmitting circuit is simple to manufacture and very suitable for mass production.