Abstract: A power converting device is disclosed, used in an electronic system for converting a first power into a second power. The power converting device includes a receiving module, a converting module and an output module. The receiving module is used for receiving the first power. The converting module is coupled to the receiving module for converting the first power into the second power according to at least one control signal. The output module is coupled to the converting module for outputting the second power.

Abstract: The invention discloses an audio playing apparatus. The audio playing apparatus has a sound detecting module, a transforming module, a controlling module and an output module. The sound detecting module is used for acquiring a sound of background sounds and generating a background sound signal. The transforming module is coupled to the sound detecting module for transforming the background sound signal to a background sound value. The controlling module is coupled to the transforming module for adjusting the volume of an audio signal according to a predetermined manner and the background sound value and generating an output signal. The output module is coupled to the controlling module for playing the output signal.

Abstract: A control apparatus comprises a voltage source, a controlling unit and an enabling unit. The controlling unit receives an input signal and generates an output signal. The enabling unit controls whether the controlling unit generates the output signal or not according to an enabling signal. The enabling unit comprises a first switch, a second resistor, a third resistor and a third transistor. The first switch selectively turns on or off according to the enabling signal. A first terminal of the second resistor is coupled to the first switch. A first terminal of the third resistor is coupled to a second terminal of the second resistor and a second terminal of the third resistor is coupled to the ground terminal. A source of the third transistor is coupled to the ground terminal and a gate of the third transistor is coupled between the second and the third resistor.

Abstract: A control circuit for controlling a motor. The control circuit includes a control module, a current transformation module and a comparison module. The control module generates a control current and a comparison voltage according to a first current, a first voltage and an input voltage. The current transformation module, coupled to the control module, generates a first output voltage from a first output terminal and a second output voltage from a second output terminal. The comparison module, coupled to the control module and the current transformation module, compares a threshold voltage, the first output voltage, the second output voltage, and the comparison voltage and generates a plurality of control signals to control the motor.

Abstract: A control apparatus comprises a voltage source, a controlling unit and an enabling unit. The controlling unit is coupled to the voltage source for receiving an input signal and generating an output signal. The enabling unit is coupled to the voltage source, the controlling unit and a ground terminal for controlling whether the controlling unit generates the output signal or not according to an enabling signal. The enabling unit comprises a first switch, a second resistor, a third resistor and a third transistor. The first switch is used for selectively turning on or off according to the enabling signal. A first terminal of the second resistor is coupled to the first switch. A first terminal of the third resistor is coupled to a second terminal of the second resistor and a second terminal of the third resistor is coupled to the ground terminal. A source of the third transistor is coupled to the ground terminal and a gate of the third transistor is coupled between the second and the third resistor.

Abstract: An amplifier structure is disclosed. The amplifier comprises a voltage source, a first amplifying unit and a second amplifying unit. The first amplifying unit is coupled to the voltage source to amplify a first input signal and a second input signal to generate a first amplified signal according to a bias current and a reference current. The second amplifying unit is coupled to the voltage source and the first amplifying unit to amplify the first input signal and the second input signal to generate a second amplified signal according to the bias current and the reference current, wherein the amplifier generates an output signal according to the first amplified signal and the second amplified signal.

Abstract: A control circuit for controlling a motor. The control circuit includes a control module, a current transformation module and a comparison module. The control module generates a control current and a comparison voltage according to a first current, a first voltage and an input voltage. The current transformation module, coupled to the control module, generates a first output voltage from a first output terminal and a second output voltage from a second output terminal. The comparison module, coupled to the control module and the current transformation module, compares a threshold voltage, the first output voltage, the second output voltage, and the comparison voltage and generates a plurality of control signals to control the motor.

Abstract: The present invention discloses a process for refining Ganoderma spore polysacchoride. The process comprise the step of: Remove the impurity in the Ganoderma spores, warm water extraction, alcohol precipitation, separate precipitate, obtain the impure polysacchoride, adjust pH to 7.5-8.5, centrifuge to removal deposit, take out supernatent, add H2O2 to decolor, deproteined by sevag method, dialyses, alcohol precipitation, wash the precipitate, dry in the vacuum to get the pure Ganoderma spore polysacchoride.

Abstract: A spiral cylindrical ceramic circular polarized antenna, wherein a cylindrical ceramic body is made of microwave ceramic material with the dielectric constant equal to or greater than 20, and spiral radiation metallic electrodes are printed on the ceramic body to cause 90 degrees of phase difference between the neighboring spiral radiation metallic electrodes. A BALUN and transformer component, PCB, or ceramic ground plane is configured on the bottom tie-plate of the ceramic body to transfer the feed signal from unbalanced signal to balanced signal and to offer a matching impedance. With this design, two mutually perpendicular electromagnetic fields are formed to create CPW (Circular Polarized Wave), in order to facilitate the reception of GPS satellite signal.