Abstract: A method for manufacturing a multilayer FPCB includes certain steps. A first printed circuit substrate is provided, the first printed circuit substrate includes a first copper layer and a first protective film, the film defining a first opening. A second printed circuit substrate is provided, this substrate includes a second copper layer and a second protective film. The second protective film defines a second opening. The first printed circuit substrate is laminated together with the second printed circuit substrate by an adhesive sheet. The adhesive sheet defines a third opening in communication with and aligned with the first opening and the second opening. The first copper layer is then etched to form a first outer wiring layer and the third copper layer is also etched to form a second outer wiring layer, thereby obtaining a multilayer FPCB.

Abstract: A fixture applicable for breaking a circuit board includes: a bottom board, comprising a front side and a back side opposite to the front side; a breaking mechanism, disposed on the front side of the bottom board, and comprising a fixing board and a flap board adjacent to the fixing board, an axis line defined between the fixing board and the flap board, the flap board being flapped along the axis line, and the circuit board being placed on the fixing board and the flap board; a first platen, including a first moving device disposed on a side of the fixing board for fixing the circuit board onto the fixing board by the first moving device; and a second platen, including a second moving device disposed on a side of the flap board for fixing the circuit board onto the flap board by the second moving device.

Abstract: A signal transmitting apparatus for orthogonal frequency division multiplexing (OFDM) system comprises a compandor, a predistortor, a power amplifier and a feedback module. The compandor is configured to compress and expand a transmitted signal. The predistortor is configured to perform a predistortion operation on output signals of the compandor. The power amplifier is configured to amplify output signals of the predistortor. The feedback module is configured to adjust parameters of the compandor and the predistortor based on a feedback signal.

Abstract: A control key assembly for an electronic device includes a housing and a control key. The housing forms a receiving portion defining an opening having two spaced-apart arms. The control key is received in the receiving portion. The control key includes a first hook and a second hook. The first hook and the second hook are slidably engaged in the opening, and alternatively latch with the two arms when the control key is slid between first and second positions.

Abstract: A cover latching mechanism for an electronic device includes a housing and a cover slidably mounted with the housing. The housing has a latching member and at least one limiting member. The cover has a cover body and a guiding rail formed on the cover body. The guiding rail is slidably mounted with the latching member. The limiting member is for preventing the guiding rail sliding apart from the housing.

Abstract: A portable electronic device includes a housing, a printed circuit board, a flexible printed circuit board, and a clip. The printed circuit board is attached to one side of the housing. The flexible printed circuit board is attached to another side of the housing. The clip is attached to the housing. The clip includes at least one arcuate portion, and the arcuate portion elastically presses the flexible printed circuit board to the printed circuit board.

Abstract: A cover latching mechanism is provided including a base member, a cover member, and a button assembly. The base member includes an elastic hook. The cover member is detachable assembled to the base member. The button assembly is fixed to the cover member and movable relative to the cover member to latch to or release from the elastic hook. The button assembly includes a button member having a positioning arm and a sleeve portion and further defining a elastic hooking hole. The elastic hook engages into the elastic hooking hole so that the elastic hook latches the button assembly with the base member. The positioning arm secures the button assembly to the cover member. The restoring member can be deformed when the button assembly pressed, so that the elastic hook releases out of the elastic hooking hole.

Abstract: The present invention discloses a signal processing device and a signal processing method. The signal processing device includes a plurality of receiving devices, a storage module, a weighting module, and a processing module. Each of the receiving devices is capable of receiving an original signal stream, thus the plurality of receiving devices can generate a set of signal streams. The storage module is used for storing a plurality set of signal streams generated by the plurality of receiving devices. The weighting module can generate plurality sets of rotated signal streams according to a reference phase and the plurality sets of signal streams, and further generate a set of weighting signal according to the rotated signal streams. And, the processing module can generate a set of weighting signal streams according to the set of weighting signal and the plurality set of signal streams.

Abstract: A battery cover latch mechanism (10) used in portable electronic device (100) is described including a cover member (11), a housing member (12), a latch assembly (13), and a return member (14). The latch assembly slides from a released position to a latched position to latch the cover member to the housing member. The return member is secured to the cover member including an elastic sheet (141) secured to the latch assembly. The elastic sheet is used to return the latch assembly from the latched position to the released position.

Abstract: A battery cover latch mechanism (10) used in portable electronic device (100) is described including a cover member (113), a housing member (111), a latch member (1137), a pressing member (15), and a releasing member (17). The latch member is used to latch the cover member to the housing member. The releasing member can be elastic deformed such that the pressing member moves and deforms the releasing member to release the cover member from the housing member.

Abstract: A battery cover latching mechanism for a portable electronic device is described. The latching mechanism includes a latching member having a latching portion. The latching portion is resilient and can engage into a latching hole as the latching member is deformed from its original state to it deformed state and securely latched in the latching hole as the latching member is restored to its original state.

Abstract: A battery cover latch mechanism (10) used in portable electronic device (100) is described including a cover member (11), a housing member (12), a latching assembly (13), and a return member (16). The latching assembly slides between a released position and a latched position. The return member is secured to the cover member including two elastic sheets (136) elastically resisting a same side of the latching assembly. The elastic sheets connect with each other. The elastic sheet is used to return the latching assembly towards the latched position.

Abstract: A portable electronic device includes a housing, a printed circuit board, a flexible printed circuit board, and a clip. The printed circuit board is attached to one side of the housing. The flexible printed circuit board is attached to another side of the housing. The clip is attached to the housing. The clip includes at least one arcuate portion, and the arcuate portion elastically presses the flexible printed circuit board to the printed circuit board.

Abstract: A control key assembly for an electronic device includes a housing and a control key. The housing forms a receiving portion defining an opening having two spaced-apart arms. The control key is received in the receiving portion. The control key includes a first hook and a second hook. The first hook and the second hook are slidably engaged in the opening, and alternatively latch with the two arms when the control key is slid between first and second positions.

Abstract: A calibration device for a power amplifier includes a calculation unit, a first storage unit and a multiplier. The calculation unit is utilized for generating a calibration factor according to a value of a characteristic parameter of the power amplifier. The first storage unit coupled to the calculation unit, for storing the calibration factor. The multiplier is coupled to the first storage unit and a baseband unit, for multiplying a baseband signal outputted from the baseband unit by the calibration factor for generating an input signal to the power amplifier.

Abstract: A lookup table generation method for a predistorter comprises sending a first single tone signal with a maximum expected amplitude to a channel simulation device including the power amplifier, estimating a closed loop gain and a closed loop phase of the power amplifier according to the first single tone signal and a first simulation output signal generated outputted by the channel simulation device, sending a plurality of single tone signals to the channel simulation device, each single tone signal having an amplitude different from all others of the plurality of single tone signals and lower than the maximum expected amplitude, generating a plurality of predistortion parameters according to the closed loop gain, the closed loop phase, the plurality of single tone signals and a plurality of simulation output signals outputted by the channel simulation device, and storing the plurality of predistortion parameters in a lookup table of the predistorter.

Abstract: A process for producing environmental protection wall plate, includes formulating raw materials including vegetable fiber powder, magnesium oxide powder, talc powder and rigid sour calcium powder in a proper ratio; stirring said raw materials with a stirrer; after stirring for a period of time, adding a solidification agent in said mixture with stirring to form a mix; pouring said mix in a plate mould; vibrating said plate mould with a vibrator to make the mix more compact; and finally, pressing the wall plate with the vibrator, and placing the wall plate for a period of time to gel and cure the wall plate; an environmental protection wall plate can be thus obtained through the above-described steps.

Abstract: A battery cover latching mechanism used in portable electronic device (10) is described including a cover member (11), a housing member (12), a latch base (14), a latch member (13), and a return member (15). The latch base can be securely attached to the housing member. The latch member is mounted on the latch base and movable relative to the latch base to latch the cover member to the housing member. The return member is compressed when the cover member is latched to the housing member. The cover can be detached from the housing either by a movement of the latch member driven by the return member or by another movement further compressing the return member.

Abstract: A window for use in an electronic device is provided. The window includes a display section and a strengthening layer. The display section is made of polyethylene terephthalate and overlaps with the strengthening layer. The strengthening layer is made of polymethyl methacrylate. The window is adhered to the electronic device with a transparent cyanoacrylate adhesive.

Abstract: A method to enforce anti-money laundering, anti-terrorist financing and other anti-crime measures in compliance with the Bank Secrecy Act and the USA PATRIOT Act in the USA or equivalent laws in other countries, and to reduce fraud in e-commerce activities such as online banking, trading, money services, shopping, etc. by reading the embedded identification information from a machine-readable government issued official identification document such as passport, driver's license, etc. and sending such information in a dynamically encrypted form to financial institution for approval and anti-money laundering, anti-terrorist financing and other anti-crime purposes. Furthermore, a set of methods can be used by the sender to dynamically encrypt the data in a different form in each transaction, and the recipient can be automatically synchronized to decrypt the received data based on said set of methods.