Abstract: The provided air conditioning system includes a self-sustained power supply apparatus, a motor coupled to the apparatus and receiving a first power supply, a first transmission system coupled to the motor and transmitting a first kinetic energy, a second transmission system coupled to the engine of a transportation tool and transmitting a second kinetic energy, a compressor coupled to one of the first transmission system and the second transmission system, receiving one of the first kinetic energy and the second kinetic energy and generating an air conditioning operation to an inner air of the transportation tool, and a switching apparatus coupled to a second power supply and employed to make one of the following results happen: the first transmission system is connected to the compressor, the second transmission system is connected to the compressor and the first and the second transmission systems are both separated from the compressor.

Abstract: The provided fractional frequency divider includes a divider controlling unit for generating a divider selection signal in response to a dual-edge triggering of an input signal and a frequency dividing unit coupled to the divider controlling unit for dividing the frequency of the input signal by one of an integer and a fractional dividers in response to the dual-edge triggering and the divider selection signal to generate the output signal of the fractional frequency divider. An operation of the frequency dividing unit is not suppressed when the integer divider is employed, the operation of the frequency dividing unit is not suppressed for a period of the input signal and is suppressed for half of that period, and this cycle is kept on recurring when the fractional divider is employed. The fractional-n PLL having the fractional frequency divider is also provided.

Abstract: The provided access point includes a self-sustained power supply apparatus, a base station coupled to the power supply apparatus and receiving a first DC power supply, and an antenna set coupled to the base station. In which, the power supply apparatus further includes an autogenic energy generating apparatus generating an AC power supply, a switch turning on and off the generating apparatus, a rectifier coupled to the generating apparatus and rectifying the AC power supply to a second DC power supply, a regulator coupled to the rectifier and regulating the second DC power supply to generate a third DC power supply, and a DC/DC converter coupled to the regulator, receiving the third DC power supply and generating the first DC power supply. A wireless audio system having two self-sustained power supply apparatuses are also provided.

Abstract: The provided air conditioning system includes a self-sustained power supply apparatus, a motor coupled to the apparatus and receiving a first power supply, a first transmission system coupled to the motor and transmitting a first kinetic energy, a second transmission system coupled to the engine of a transportation tool and transmitting a second kinetic energy, a compressor coupled to one of the first transmission system and the second transmission system, receiving one of the first kinetic energy and the second kinetic energy and generating an air conditioning operation to an inner air of the transportation tool, and a switching apparatus coupled to a second power supply and employed to make one of the following results happen: the first transmission system is connected to the compressor, the second transmission system is connected to the compressor and the first and the second transmission systems are both separated from the compressor.

Abstract: The provided camera system includes an AC/DC self-sustained power supply apparatus, a camera coupled to the apparatus and receiving a first power supply and a video transmitting device coupled to the camera and transmitting a video signal generated by the camera to a monitor system. Furthermore, a wireless non-video door phone system having at least three DC self-sustained power supply apparatuses and a wireless video door phone system having at least three DC/AC self-sustained power supply apparatuses are also provided.

Abstract: The provided fractional frequency divider includes a divider controlling unit for generating a divider selection signal in response to a dual-edge triggering of an input signal and a frequency dividing unit coupled to the divider controlling unit for dividing the frequency of the input signal by one of an integer and a fractional dividers in response to the dual-edge triggering and the divider selection signal to generate the output signal of the fractional frequency divider. An operation of the frequency dividing unit is not suppressed when the integer divider is employed, the operation of the frequency dividing unit is not suppressed for a period of the input signal and is suppressed for half of that period, and this cycle is kept on recurring when the fractional divider is employed. The fractional-n PLL having the fractional frequency divider is also provided.

Abstract: The designing method and circuits for a multi-band electronic circuit having at least one transistor have been proposed. The proposed method includes steps of: (a) changing the capacitance between the input terminal and the output terminal of the transistor of the circuit, and (b) obtaining the resonant frequency of the circuit in response to the changed capacitance for switching among multiple bands. The designing method and circuits for a multi-band amplifier, which includes at least one transistor having an input terminal and an inductor electrically connected to the input terminal of the transistor, have been proposed too. The designing method for a multi-band amplifier includes steps of: changing the bias of the transistor, and switching the resonant frequency of the input impedance of the transistor and the inductor in response to the changed bias for switching among multiple bands.

Abstract: The designing methods for an impedance matching are provided which include steps of: connecting in parallel a capacitor to a collector/drain of a bipolar/field effect transistor having a common-emitter configuration, and obtaining a desired resistance at a base/gate of the bipolar/field effect transistor due to a feedback effect for achieving the impedance matching. The circuits for an impedance matching are also provided which include: a first bipolar/field effect transistor, an inductor, a first resistor, a power supply, a capacitor, a second bipolar/field effect transistor, a second resistor, and a third resistor, wherein a desired resistance is produced in the input impedance looking into the base/gate of the first bipolar/field effect transistor through an equivalent parallel combination of an capacitor and an resistor produced at the base/gate of the second bipolar/field effect transistor so as to achieve the impedance matching.

Abstract: The designing methods for an impedance matching are provided which include steps of: connecting in parallel a capacitor to a collector/drain of a bipolar/field effect transistor having a common-emitter configuration, and obtaining a desired resistance at a base/gate of the bipolar/field effect transistor due to a feedback effect for achieving the impedance matching. The circuits for an impedance matching are also provided which include: a first bipolar/field effect transistor, an inductor, a first resistor, a power supply, a capacitor, a second bipolar/field effect transistor, a second resistor, and a third resistor, wherein a desired resistance is produced in the input impedance looking into the base/gate of the first bipolar/field effect transistor through an equivalent parallel combination of an capacitor and an resistor produced at the base/gate of the second bipolar/field effect transistor so as to achieve the impedance matching.

Abstract: The designing method and circuits for a multi-band electronic circuit having at least one transistor have been proposed. The proposed method includes steps of: (a) changing the capacitance between the input terminal and the output terminal of the transistor of the circuit, and (b) obtaining the resonant frequency of the circuit in response to the changed capacitance for switching among multiple bands. The designing method and circuits for a multi-band amplifier, which includes at least one transistor having an input terminal and an inductor electrically connected to the input terminal of the transistor, have been proposed too. The designing method for a multi-band amplifier includes steps of: changing the bias of the transistor, and switching the resonant frequency of the input impedance of the transistor and the inductor in response to the changed bias for switching among multiple bands.