Abstract: A transmitter device which transmits a first transmit signal and a second transmit signal having different wireless communication standards. The transmitter device includes a power amplifier that amplifies the first transmit signal in a first transmission mode. A first impedance circuit provides the amplified first transmit signal to a radio frequency output port. A second impedance circuit is connected to the first impedance circuit and provides an additional impedance to the first impedance circuit in the first transmission mode. A first switch provides the second transmit signal to the first impedance circuit in a second transmission mode.

Abstract: A circuit board device for reducing acoustic noise is provided. The circuit board device includes a substrate, a first capacitor packaging area, a second capacitor packaging area, a first pad, a second pad, a third pad and a fourth pad. The first and second capacitor packaging areas are respectively disposed on a first side and a second side of the substrate in a back-to-back manner. The first and second pads are disposed in the first capacitor packaging area for mounting a first capacitor. The third and fourth pads are disposed in the second capacitor packaging area for mounting a second capacitor, wherein the first and third pads are set back-to-back and electrically connected to each other, and the second and fourth pads are set back-to-back and electrically connected to each other.

Abstract: A signal receiving apparatus includes: a first amplifying device, a second amplifying device, a feedback device, and a mixing device, wherein the mixing device is a passive mixer, the second amplifying device is arranged to provide an input impedance looking into an input terminal of the second amplifying device to fall within a first impedance range when the second amplifying device operates in a first frequency range, the second amplifying device is arranged to provide the input impedance looking into the input terminal of the second amplifying device to fall within a second impedance range when the second amplifying device operates in a second frequency range, the second frequency range is different from the first frequency range, and the second impedance range is different from the first impedance range.

Abstract: A signal receiving apparatus includes: a first amplifying device, a second amplifying device, a feedback device, and a mixing device, wherein the mixing device is a passive mixer, the second amplifying device is arranged to provide an input impedance looking into an input terminal of the second amplifying device to fall within a first impedance range when the second amplifying device operates in a first frequency range, the second amplifying device is arranged to provide the input impedance looking into the input terminal of the second amplifying device to fall within a second impedance range when the second amplifying device operates in a second frequency range, the second frequency range is different from the first frequency range, and the second impedance range is different from the first impedance range.

Abstract: A circuit board device for reducing acoustic noise is provided. The circuit board device includes a substrate, a first capacitor packaging area, a second capacitor packaging area, a first pad, a second pad, a third pad and a fourth pad. The first and second capacitor packaging areas are respectively disposed on a first side and a second side of the substrate in a back-to-back manner. The first and second pads are disposed in the first capacitor packaging area for mounting a first capacitor. The third and fourth pads are disposed in the second capacitor packaging area for mounting a second capacitor, wherein the first and third pads are set back-to-back and electrically connected to each other, and the second and fourth pads are set back-to-back and electrically connected to each other.

Abstract: A transceiver includes a power amplifying circuit, a first balance-unbalance circuit, a switchable matching circuit, and a low-noise amplifying circuit. The power amplifying circuit generates differential output signals during a transmitting mode of the transceiver. The first balance-unbalance circuit converts the differential output signals into a single-ended output signal. The switchable matching circuit receives the single-ended output signal on a signal port of the transceiver during the transmitting mode, and converts a single-ended receiving signal on the signal port into a single-ended input signal during a receiving mode of the transceiver. The low-noise amplifying circuit converts the single-ended input signal into a low-noise input signal during the receiving mode.

Abstract: A transceiver includes a power amplifying circuit, a first balance-unbalance circuit, a switchable matching circuit, and a low-noise amplifying circuit. The power amplifying circuit generates differential output signals during a transmitting mode of the transceiver. The first balance-unbalance circuit converts the differential output signals into a single-ended output signal. The switchable matching circuit receives the single-ended output signal on a signal port of the transceiver during the transmitting mode, and converts a single-ended receiving signal on the signal port into a single-ended input signal during a receiving mode of the transceiver. The low-noise amplifying circuit converts the single-ended input signal into a low-noise input signal during the receiving mode.

Abstract: A transceiver includes: a first transforming network arranged for using a first input impedance to receive a first modulated signal and using a first output impedance to output a first transformed signal during a transmitting mode of a first communication standard, and for using the first input impedance to receive a second modulated signal and using a second output impedance to output a second transformed signal during the transmitting mode of a second communication standard; a second transforming network arranged for using a second input impedance to receive the second transformed signal and using a third output impedance to output a first RF signal to a connecting port of the transceiver during the transmitting mode of the second communication standard; a power amplifier, arranged to generate a second RF signal; and a switching circuit for selectively coupling the second transformed signal to the second transforming network.

Abstract: A radio-frequency (RF) front-end supporting at least a first and second wireless communication bands includes a mixer arranged for mixing a received signal with a first local oscillation signal when the shared receiver front-end performs the reception operation according to the first wireless communication band, and for mixing the received signal with a second local oscillation signal when the shared receiver front-end performs the reception operation according to the second wireless communication band, wherein the first and second local oscillation signals are different in frequency.

Abstract: A signal transceiver includes a first power amplifier coupled to a chip output port of a chip; an impedance transforming circuit; a switching circuit arranged to selectively couple the chip output port to a first port of the impedance transforming circuit; and a receiving amplifier coupled to a second port of the impedance transforming circuit.

Abstract: A transceiver includes: a power amplifying circuit arranged to generate differential output signals during a transmitting mode of the transceiver; a balance-unbalance circuit arranged to convert the differential output signals into a single-ended output signal; a switchable matching circuit arranged to receive the single-ended output signal on a signal port of the transceiver during the transmitting mode, and to convert a single-ended receiving signal on the signal port into a single-ended input signal during a receiving mode of the transceiver; and a low-noise amplifying circuit arranged to convert the single-ended input signal into a low-noise input signal during the receiving mode. The power amplifying circuit, the Balun, the switchable matching circuit, and the low-noise amplifying circuit are configured as a single chip.

Abstract: Embodiments of a method for selecting an antenna set and a wireless communication device utilizing the same are described. The wireless communication device includes a set of external antenna ports, a set of internal antennas, a communication circuit and a controller. The set of external antenna ports receives a set of first RF signals from a set of external antennas. The set of internal antennas receives a set of second RF signals. The communication circuit, coupled to the set of external antenna ports and the set of internal antennas, determines a first signal quality according to the set of first RF signals, determines a second signal quality according to the set of second RF signals, determines which of the first or second signal quality is higher, and switches to the set of antennas which correspond to the higher signal quality.

Abstract: A receiving device includes: a mixer module arranged to receive an input signal to generate a down-converted output; a first active filter, the first active filter arranged to receive the down-converted output and perform an active filtering process upon the down-converted output to generate a first filtered output; a passive filter, the passive filter arranged to receive the first filtered output and perform a passive filtering process upon the first filtered output to generate a second filtered output; and a processing circuit, the processing circuit arranged to receive the second filtered output and process the second filtered output to generate an output signal corresponding to the input signal.

Abstract: A multi-standards transceiver includes: a first synthesizer arranged to generate a first oscillating signal; a second synthesizer arranged to generate a second oscillating signal; a first transceiver; a second transceiver; and a multiplexer coupled to the first synthesizer and the second synthesizer; wherein when the multi-standards transceiver operates under a first frequency mode, the first transceiver is arranged to use the first oscillating signal to modulate a first analog signal and the multiplexer is arranged to output the second oscillating signal to the second transceiver so that the second transceiver uses the second oscillating signal to modulate a second analog signal.

Abstract: A transceiver includes: a first transforming network arranged for using a first input impedance to receive a first modulated signal and using a first output impedance to output a first transformed signal during a transmitting mode of a first communication standard, and for using the first input impedance to receive a second modulated signal and using a second output impedance to output a second transformed signal during the transmitting mode of a second communication standard; a second transforming network arranged for using a second input impedance to receive the second transformed signal and using a third output impedance to output a first RF signal to a connecting port of the transceiver during the transmitting mode of the second communication standard; a power amplifier, arranged to generate a second RF signal; and a switching circuit for selectively coupling the second transformed signal to the second transforming network.

Abstract: A transceiver includes: a power amplifying circuit arranged to generate differential output signals during a transmitting mode of the transceiver; a balance-unbalance circuit arranged to convert the differential output signals into a single-ended output signal; a switchable matching circuit arranged to receive the single-ended output signal on a signal port of the transceiver during the transmitting mode, and to convert a single-ended receiving signal on the signal port into a single-ended input signal during a receiving mode of the transceiver; and a low-noise amplifying circuit arranged to convert the single-ended input signal into a low-noise input signal during the receiving mode. The power amplifying circuit, the Balun, the switchable matching circuit, and the low-noise amplifying circuit are configured as a single chip.

Abstract: A radio-frequency (RF) front-end supporting at least a first and second wireless communication bands includes a mixer arranged for mixing a received signal with a first local oscillation signal when the shared receiver front-end performs the reception operation according to the first wireless communication band, and for mixing the received signal with a second local oscillation signal when the shared receiver front-end performs the reception operation according to the second wireless communication band, wherein the first and second local oscillation signals are different in frequency.

Abstract: A method for executing a mouse function of electronic device and an electronic device thereof are provided. In the present method, an amount and a relative position of input signals are detected by a sensor module. Then, whether the amount and the relative position are respectively conformed to a predetermined value is determined. If the predetermined values are conformed, whether the input signal is conformed to a specific signal is determined when a variation of the relative position is occurred. Finally, a corresponding mouse function is executed according to a type of the variation if the variation is conformed to the specific signal. As a result, a mouse device is no longer needed for a user to accomplish a directional operation on the electronic device so as to prevent inconvenience of particularly carrying a mouse device.

Abstract: A method for executing a mouse function of electronic device and an electronic device thereof are provided. In the present method, an amount and a relative position of input signals are detected by a sensor module. Then, whether the amount and the relative position are respectively conformed to a predetermined value is determined. If the predetermined values are conformed, whether the input signal is conformed to a specific signal is determined when a variation of the relative position is occurred. Finally, a corresponding mouse function is executed according to a type of the variation if the variation is conformed to the specific signal. As a result, a mouse device is no longer needed for a user to accomplish a directional operation on the electronic device so as to prevent inconvenience of particularly carrying a mouse device.

Abstract: A calibration apparatus includes: a first circuit arranged for generating a reference voltage with respect to a first circuit element according to a reference current flowing to the first circuit element; a second circuit arranged for generating an output voltage according to a tunable current; and an adjusting circuit for adjusting the tunable current to a target current value according to the reference voltage and the output voltage, wherein the adjusting circuit comprises: a search unit for performing a search according to a comparison result of the reference voltage and the output voltage to thereby determine a control setting; and a control unit coupled to the search unit, and for generating a control signal to the second circuit according to the control setting, and after the search unit adjusts the control setting, the search unit stops adjusting the control setting according to the comparison result.