Abstract: An air conditioning system is provided with an integrated heat exchanger. The air conditioning system generates heating air or cooling air through the integrated heat exchanger that adjusts the temperature of conditioning air by circulating coolant, thus securing cooling and heating efficiency. The air conditioning system adjusts temperature by the coolant circulated in the integrated heat exchanger such that a temperature adjustment door for adjusting the temperature of the conditioning air is eliminated, the number of components is decreased, and the size of an overall package is reduced.

Abstract: A flow nanoparticle measurement device according to an embodiment of the present disclosure includes a flow cell in which a liquid sample flows, a first laser beam being irradiated to the flow cell; a laser generator configured to generate the first laser beam; and a flow controller configured to control a flow of the liquid sample for the flow cell.

Abstract: A power amplifier module includes a power amplifier including an amplifier including an amplifying transistor configured to amplify an input signal, and output an output signal, and a bias circuit including a bias transistor configured to provide a bias current to the amplifying transistor; and a controller configured to provide a control current to the bias transistor, wherein the controller is configured to vary the control current based on a temperature of the amplifying transistor.

Abstract: A power amplifier module includes a power amplifier including an amplifying unit including an amplifying transistor configured to amplify an input signal and output an output signal, and a bias unit including a bias transistor configured to provide a bias current to the amplifying transistor, and a sub bias transistor configured to provide a sub bias current to the amplifying transistor; and a control unit configured to provide a control current to the bias transistor and the sub bias transistor. The control unit is further configured to vary the control current according to the sub bias current, and a level of the sub bias current is lower than a level of the bias current.

Abstract: A power amplifier includes an amplifying circuit, including an amplifying transistor configured to amplify an input signal and configured to output an output signal, a bias circuit, including a bias transistor comprising an emitter configured to provide a bias current into a base of the amplifying transistor, and a base into which a control current is input, and an overcurrent protecting circuit configured to bypass the control current into a ground, according to a current level of the output signal.

Abstract: A power amplifier includes an amplifying circuit, including an amplifying transistor configured to amplify an input signal and configured to output an output signal, a bias circuit, including a bias transistor comprising an emitter configured to provide a bias current into a base of the amplifying transistor, and a base into which a control current is input, and an overcurrent protecting circuit configured to bypass the control current into a ground, according to a current level of the output signal.

Abstract: A power amplifier module includes a power amplifier including an amplifying unit including an amplifying transistor configured to amplify an input signal and output an output signal, and a bias unit including a bias transistor configured to provide a bias current to the amplifying transistor, and a sub bias transistor configured to provide a sub bias current to the amplifying transistor; and a control unit configured to provide a control current to the bias transistor and the sub bias transistor. The control unit is further configured to vary the control current according to the sub bias current, and a level of the sub bias current is lower than a level of the bias current.

Abstract: A power amplifier module includes a power amplifier including an amplifier including an amplifying transistor configured to amplify an input signal, and output an output signal, and a bias circuit including a bias transistor configured to provide a bias current to the amplifying transistor; and a controller configured to provide a control current to the bias transistor, wherein the controller is configured to vary the control current based on a temperature of the amplifying transistor.

Abstract: There are provided a motor drive controller, a motor drive control method, and a motor system using the same. The motor drive controller may include: a voltage-vector providing unit generating voltage vectors having the same magnitude; an inverter unit applying the voltage vectors to multiple phases of a motor device; and a rotor position determining unit detecting currents generated in the motor device by the voltage vectors and determining a position of a rotor of the motor device by using the currents and rotation information of the motor device.

Abstract: There are provided a circuit and a method for detecting a duty ratio of a PWM signal. The circuit includes: a counting unit counting a PWM signal; a detection indication determining unit determining whether a detection indication signal indicating a start of detection of the duty ratio of the PWM signal has been input; an edge detecting unit detecting a preset PWM edge of the PWM signal; and a duty calculating unit calculating the duty ratio of the PWM signal using a count value during a section from a k-th point in time (T(k)) (k being a natural number of 1 or more) at which the PWM edge is detected after it is determined that the detection indication signal has been input to a k+1-th point in time (T(k+1)) at which the PWM edge is detected after it is subsequently determined that the detection indication signal has been input.

Abstract: There are provided a circuit and a method for detecting a duty ratio of a PWM signal. The circuit includes: a counting unit counting a PWM signal; a detection indication determining unit determining whether a detection indication signal indicating a start of detection of the duty ratio of the PWM signal has been input; an edge detecting unit detecting a preset PWM edge of the PWM signal; and a duty calculating unit calculating the duty ratio of the PWM signal using a count value during a section from a k-th point in time (T(k)) (k being a natural number of 1 or more) at which the PWM edge is detected after it is determined that the detection indication signal has been input to a k+1-th point in time (T(k+1)) at which the PWM edge is detected after it is subsequently determined that the detection indication signal has been input.