Abstract: An outdoor unit of an air conditioner, including a housing including an inlet and an outlet, wherein a flow path is formed between the inlet and the outlet inside the housing; a heat exchanger positioned on the flow path inside the housing; and a blower fan inside the housing between the inlet and the heat exchanger, and configured to flow air along the flow path, from the inlet, through the heat exchanger, and toward the outlet, wherein the blower fan includes a hub configured to be rotatable, and a plurality of blades extending from the hub and arranged along a circumference of the hub, each blade among the plurality of blades includes a leading edge at a side of a rotation direction of the hub, a trailing edge opposite to the leading edge, and a blade surface between the leading edge and the trailing edge and inclined toward the inlet from the trailing edge to the leading edge.

Abstract: In a wireless local area network (WLAN) system, a transmission STA can transmit a PPDU via a 320 MHz channel, and a Medium Access Control (MAC) signal may be generated for the PPDU. The MAC signal may include puncturing pattern information and channel center frequency segment (CCFS) information for a 320 MHz band. The CCFS information may include a first CCFS field related to channel center frequency (CCF) information of a primary 160 MHz channel, and a second CCFS field related to CCF information of a 320 MHz channel.

Abstract: One example according to the present specification relates to a technique for forming a midamble in a wireless LAN (WLAN) system. A reception STA may receive an NGV PPDU. The NGV PPDU may include a preamble, a data field, and a midamble. The midamble format may be determined as either a first format or a second format. A midamble symbol of the first format may include an LTF signal and a GI pertaining to the LTF signal.

Abstract: Proposed are a method and a device for configuring a spatial reuse field in a wireless LAN system. Specifically, a reception STA receives a trigger frame from a transmission STA. The reception STA transmits a TB PPDU to the transmission STA through a pre-configured frequency band. The trigger frame comprises a common information field and a special user information field. The common information field comprises first to fourth spatial reuse fields. The special user information field comprises fifth and sixth spatial reuse fields. When the pre-configured frequency band is a 20 MHz band, the first to fourth spatial reuse fields are configured by the value of the fifth spatial reuse field.

Abstract: Proposed are a method and a device for configuring a spatial reuse field in a wireless LAN system. Specifically, a reception STA receives a trigger frame from a transmission STA. The reception STA transmits a TB PPDU to the transmission STA through a pre-configured frequency band. The trigger frame comprises a common information field and a special user information field. The common information field comprises first to fourth spatial reuse fields. The special user information field comprises fifth and sixth spatial reuse fields. When the pre-configured frequency band is a 20 MHz band, the first to fourth spatial reuse fields are configured by the value of the fifth spatial reuse field.

Abstract: Proposed are a method and a device for configuring a spatial reuse field in a wireless LAN system. Specifically, a reception STA receives a trigger frame from a transmission STA. The reception STA transmits a TB PPDU to the transmission STA through a preconfigured frequency band. The trigger frame includes a common information field and a special user information field. The common information field includes a first to a fourth spatial reuse field. Values of the first to fourth spatial reuse fields are configured to 0 or 15.

Abstract: A method and device for transmitting an NGV frame in a wireless LAN system is proposed. Specifically, a transmission device generates an NGV frame and transmits the NGV frame through a first band. The NGV frame includes an L-STF, an L-LTF, an L-SIG, an NGV-SIG, an NGV-STF, an NGV-LTF, and NGV-Data. The L-STF, the L-LTF, the L-SIG, and the NGV-SIG are duplicated in units of second bands and transmitted through the first band. The NGV-STF, the NGV-LTF, and the NGV-Data are transmitted through a full band of the first band. The first band is a 20 MHz band, and a second band is a 10 MHz band.

Abstract: The present disclosure relates to novel imidazo[1,2-a]pyridine derivatives, and more particularly to imidazo[1,2-a]pyridine derivatives of Formula 1 wherein Y1, Y2 and Y3 are each independently H, halogen, a C1-C6 straight chain alkyl unsubstituted or substituted with R1, or hydroxy; R1 is hydroxy; Y4 is H, C1-C6 straight chain alkyl, or C1-C6 alkoxy; and X is H or halogen, and having an excellent activity of inhibiting gastric acid secretion, methods for preparing the same, and the use thereof. The imidazo[1,2-a]pyridine derivatives according to the present disclosure have gastric acid secretion inhibitory activity, and thus may be effectively used for the prevention or treatment of gastrointestinal inflammatory diseases or gastric acid-related diseases.

Abstract: The present disclosure relates to novel imidazo [1,2-?]pyridine derivatives, and more particularly to imidazo [1,2-?]pyridine derivatives having an excellent activity of inhibiting gastric acid secretion, methods for preparing the same, and the use thereof. The imidazo[1,2-?]pyridine derivatives according to the present disclosure have gastric acid secretion inhibitory activity, and thus may be effectively used for the prevention or treatment of gastrointestinal inflammatory diseases or gastric acid-related diseases.

Abstract: One cable compensation circuit is connected to a shunt regulator to generate a feedback voltage corresponding to an output voltage of a power supply device. The cable compensation circuit controls cathode impedance of the shunt regulator according to the output current of the power supply device to compensate a voltage drop generated in a cable.

Abstract: The present invention related to a switch control circuit, a coupled inductor boost converter including the same, and a driving method thereof. The coupled inductor boost converter includes a first inductor connected between an input voltage and a first node, a second inductor connected between the first node and a second node, and a power switch connected between the first node and a ground, and a switch control circuit. The switch control circuit receives a voltage of the second node and turn on the power switch by using the voltage of the second node at a time when a voltage of the first node becomes a zero voltage.

Abstract: A piezoelectric driving circuit generates a first PWM output according to a result of comparison between a ramp signal and a reference sinewave and generates a second PWM according to a result of comparison between the ramp signal and an inverse reference sinewave of the reference sinewave. The switching operation of the first and third switches of the piezoelectric driving circuit are controlled according to the first PWM output and the switching operation of the second and fourth switches of the piezoelectric driving circuit are controlled according to the second PWM output during a first cycle of the reference sinewave and the inverse reference sinewave. The switching operation of the first and third switches are controlled according to the second PWM output and the switching operation of the second and fourth switches are controlled according to the first PWM output during the next second cycle.

Abstract: One cable compensation circuit is connected to a shunt regulator to generate a feedback voltage corresponding to an output voltage of a power supply device. The cable compensation circuit controls cathode impedance of the shunt regulator according to the output current of the power supply device to compensate a voltage drop generated in a cable.

Abstract: A piezoelectric driving circuit generates a first PWM output according to a result of comparison between a ramp signal and a reference sinewave and generates a second PWM according to a result of comparison between the ramp signal and an inverse reference sinewave of the reference sinewave. The switching operation of the first and third switches of the piezoelectric driving circuit are controlled according to the first PWM output and the switching operation of the second and fourth switches of the piezoelectric driving circuit are controlled according to the second PWM output during a first cycle of the reference sinewave and the inverse reference sinewave. The switching operation of the first and third switches are controlled according to the second PWM output and the switching operation of the second and fourth switches are controlled according to the first PWM output during the next second cycle.

Abstract: The present invention related to a switch control circuit, a coupled inductor boost converter including the same, and a driving method thereof. The coupled inductor boost converter includes a first inductor connected between an input voltage and a first node, a second inductor connected between the first node and a second node, and a power switch connected between the first node and a ground, and a switch control circuit. The switch control circuit receives a voltage of the second node and turn on the power switch by using the voltage of the second node at a time when a voltage of the first node becomes a zero voltage.