Abstract: A swing trainer for exercise contains a handle having a first end and a second end relative to the first end, and the second end having a screw rod; a body having a first segment and a second segment relative to the first segment, the first segment fitting with the second end of the handle, and the screw rod being inserted into the body, between the first segment and the second segment being axially defined a defining rail; a counterweight block fixed in the body, the counterweight block having a first screw orifice defined thereon to screw with the screw rod of the handle and a slot axially defined on a side of an outer surface thereof to match with the defining rail of the body; a limiting member for limiting a connection of the handle and the body so that the handle moves relative to the body.

Abstract: An adjustable batting apparatus contains a spring, at least one batting pad, a belt, and a rolling device. The spring is cylindrical and including a plurality of coils, a first segment, a second segment, and the first segment is fixed on a fixing face of a base. The at least one batting pad is connected with the second segment. The belt has a first end coupled with the second segment of the spring and has a second end. The rolling device has the second end of the belt rolled therearound, and a part of the belt extends out of the rolling device so as to form an extending section, such that the rolling device controls a length of the extending section of the belt so as to adjust a distance between the plurality of coils of the spring, hence a bending flexibility of the spring is adjusted.

Abstract: An adjustable batting apparatus contains a spring, at least one batting pad, a screw rod, and a nut. The spring is cylindrical and includes a plurality of coils, a first segment, a second segment, and the first segment or the second segment is fixed on a fixing face. The at least one batting pad is connected with the second segment or the first segment. The screw rod is axially inserted into the spring and having a first end coupled with the first segment of the spring and a second end extending out of the second segment of the spring so as to form an adjusting section. The nut screws with the adjusting section so that the nut is rotated to control a length of the adjusting section of the screw rod, hence the spring is pressed or released, thus adjusting a bending flexibility of the spring.

Abstract: A swing trainer for exercise contains a handle having a first end and a second end relative to the first end, and the second end having a screw rod; a body having a first segment and a second segment relative to the first segment, the first segment fitting with the second end of the handle, and the screw rod being inserted into the body, between the first segment and the second segment being axially defined a defining rail; a counterweight block fixed in the body, the counterweight block having a first screw orifice defined thereon to screw with the screw rod of the handle and a slot axially defined on a side of an outer surface thereof to match with the defining rail of the body; a limiting member for limiting a connection of the handle and the body so that the handle moves relative to the body.

Abstract: A data card for a computer system capable of providing a loudspeaker mode for a mobile phone call is disclosed. The data card includes an antenna, an RF module, a first signal processing unit for processing a baseband signal for generating a first analog audio output signal corresponding to audio data played by a speaker when the computer system operates in the loudspeaker mode, a second signal processing unit, a transmission interface for outputting a first digital audio output signal corresponding to the audio data to the computer system, wherein the first digital audio output signal is generated according to the first analog audio output signal through an encoding process, a microphone device, and an audio codec for performing the encoding process on the first analog audio output signal in order to generate the first digital audio output signal.

Abstract: An embedded system with power-saving functions includes a central processing unit, a detecting and controlling unit, and a clock generating unit. The central processing unit is used for controlling operations of the embedded system. The detecting and controlling unit is used for detecting a designated operating status of the central processing unit to generate a control signal. The clock generating unit is coupled to the detecting and controlling unit and the central processing unit for setting a clock signal to the central processing unit according to the control signal. The designated operating status includes a usage or a loading status of the central processing unit.

Abstract: This specification discloses a symbol timing recovery circuit, which includes a transform value generation circuit, a selection circuit, a plurality of accumulators, and a comparison module. Without performing phase difference calculation, the invention is a symbol timing recovery circuit that can directly use digital in-phase signal components and digital quadrature signal components of consecutive two symbols to obtain an optimal sampling point. The invention also provides a phase demodulator with a simple structure.

Abstract: A wireless transmitter (300) communicates with a wireless earphone (100) to obtain remote communications. The wireless earphone includes: a wireless network card (30?) complying with the 802.11a/b/g standard, for receiving data packets and unpacking them to release digital audio signals; a control processor (20?) connected with the wireless network card, for dealing with the digital audio signals; and a digital-to-analog converter (50) connected with the control processor, for converting the digital audio signals to analog audio signals. The wireless transmitter has a structure similar to that of the wireless earphone, except that the wireless transmitter has an analog-to-digital converter (10) instead of the digital-to-analog converter.

Abstract: The present invention relates to a circuit and method for symbol timing recovery in phase modulation systems. First, phase differences of in-phase signals and quadrature signals in a polar coordinate are generated at the same sampling points of neighboring symbols. Second, an operator is generated by taking a square of a value subtracting the phase difference from a default phase value. Third, the sums of phase differences of every sampling point in a symbol are computed to determine an optimal sampling point in a symbol period and correctly recover symbol timing of signal sequences. By the above properties, the present invention has a simple structure and can shorten an execution time.

Abstract: This specification discloses a symbol timing recovery circuit, which includes a transform value generation circuit, a selection circuit, a plurality of accumulators, and a comparison module. Without performing phase difference calculation, the invention is a symbol timing recovery circuit that can directly use digital in-phase signal components and digital quadrature signal components of consecutive two symbols to obtain an optimal sampling point. The invention also provides a phase demodulator with a simple structure.

Abstract: The present invention relates to a circuit and method for symbol timing recovery in phase modulation systems. First, phase differences of in-phase signals and quadrature signals in a polar coordinate are generated at the same sampling points of neighboring symbols. Second, an operator is generated by taking a square of a value subtracting the phase difference from a default phase value. Third, the sums of phase differences of every sampling point in a symbol are computed to determine an optimal sampling point in a symbol period and correctly recover symbol timing of signal sequences. By the above properties, the present invention has a simple structure and can shorten an execution time.