Abstract: Provided is an electric vehicle battery transportation container having a shield sleeve, a ratchet which tightens a belt to fix an electric vehicle battery to a seat base in a state in which a battery fixing hook connected to a leading end portion of the ratchet accommodated in a ratchet accommodation recess part formed in the seat base is inserted into an assembly hole formed in a lower bracket of the electric vehicle battery loaded on the seat base, one or more foldable anti-slip parts installed on the seat base stand upright to prevent left-right slip and front-rear slip of the electric vehicle battery at the same time, and a corner support shaft formed with an inclined structure having a decreasing inner diameter and unevenly coupled to a support shaft insertion groove to load seat bases on a transportation vehicle in multiple stages.

Abstract: A low noise amplifier includes: an amplification unit including a first transistor and a second transistor connected in a cascode structure and configured to amplify a signal input to a control terminal of the first transistor; and a gain controller connected between a contact point at which the first transistor and the second transistor are connected to each other and a power source voltage, and configured to adjust a gain of the amplification unit.

Abstract: Provided is an electric vehicle battery transportation container having a battery fixing hook, one or more foldable anti-slip parts installed on a seat base manufactured in a plate shape having a closed upper surface stand upright to prevent left- right slip and front-rear slip of an electric vehicle battery, a ratchet which tightens a belt to fix the electric vehicle battery to the seat base in a state in which a battery fixing hook connected to the ratchet accommodated in a ratchet accommodation recess part formed in the seat base by the belt is inserted into an assembly hole formed in a lower bracket of the electric vehicle battery loaded on the seat base, and a corner support shaft unevenly coupled to a support shaft insertion groove formed with an inclined structure having a decreasing inner diameter to load seat bases on a transportation vehicle in multiple stages.

Abstract: The present invention relates to a technical idea for providing a delivery service on regular and irregular roads using autonomous vehicles. More specifically, the present invention relates to technology in which, on a regular road, a lead vehicle and at least one droid vehicle are coupled to each other and a delivery service is provided based on autonomous driving; and on an irregular road, the coupling between the lead vehicle and the droid vehicle is automatically released and the droid vehicle provides a delivery service by remotely controlling the driving of the droid vehicle by the lead vehicle in the last mile delivery section corresponding to the irregular road.

Abstract: A protection circuit is provided. The protection circuit protects a power amplifier that includes a power transistor configured to receive a power voltage, and a bias circuit configured to supply a bias current to the power transistor. The protection circuit includes: a first transistor, connected between a terminal of the bias circuit and a ground, and configured to sink a first current from the terminal of the bias circuit; and a second transistor, comprising a first terminal connected to the power voltage, a second terminal connected to a control terminal of the first transistor, and a control terminal connected to a reference voltage.

Abstract: Provided is a grill pan for a direct fired roast, capable of reducing heat conduction to an oil collecting part through a roasting plate, and fundamentally preventing oil from being burned in the oil collecting part. The grill pan includes an integrated roasting plate (300) including a disc part (310) having a ring shape, a reinforcing plate (320) connected to as inner surface of the disc part across a center of the disc part having the ring shape, a plurality of upper ribs (330) spaced apart from each other at a predetermined interval such that both ends of the per rib are connected to the inner surface of the disc part, and a plurality of lower ribs (340) in which the lower rib is provided between the upper ribs such that both ends of the lower rib are connected to the inner surface of the disc part.

Abstract: A protection circuit is provided. The protection circuit protects a power amplifier that includes a power transistor configured to receive a power voltage, and a bias circuit configured to supply a bias current to the power transistor. The protection circuit includes: a first transistor, connected between a terminal of the bias circuit and a ground, and configured to sink a first current from the terminal of the bias circuit; and a second transistor, comprising a first terminal connected to the power voltage, a second terminal connected to a control terminal of the first transistor, and a control terminal connected to a reference voltage.

Abstract: A low noise amplifier includes: an amplification unit including a first transistor and a second transistor connected in a cascade structure and configured to amplify a signal input to a control terminal of the first transistor; and a gain controller connected between a contact point at which the first transistor and the second transistor are connected to each other and a power source voltage, and configured to adjust a gain of the amplification unit.

Abstract: The present invention relates to a grill pan for a direct fired roast including a side wall, and a bottom surface of a grill pan main body surrounded by the side wall. The bottom surface includes: an oil collecting part concavely formed in the bottom surface along a lower end of the side wall; a plurality of lower ribs formed at an upper surface thereof with a first oil passage connected to the oil collecting part, and spaced apart from each other at a predetermined interval; a plurality of upper ribs located higher than the lower ribs, formed at an upper surface thereof with a second oil passage connected to the oil collecting part, and spaced apart from each other at a predetermined interval; and a heat outlet formed between a lower portion of the upper rib and an upper portion of the lower rib to discharge heat.

Abstract: Embodiments of the present invention include a connection pipe and a method of manufacturing the connection pipe for an evaporator of a refrigeration device. In the connection pipe and method, high-frequency welding is performed while a first pipe is at one side of a tube and a second pipe is at another side of the tube are welded, and a first curvature portion is in the first pipe and a second curvature portion is in the second pipe. Even though the connection pipe according to embodiments of the present invention is forced or pressed to connect a suction pipe to the second pipe, the connection pipe may not be deformed or damaged due to a structural characteristic during installation of the evaporator in the refrigeration device.

Abstract: A power amplifier includes a common source amplifier and a common gate amplifier circuit. The common source amplifier circuit has a terminal connected to a radio frequency (RF) input terminal and uses a source terminal commonly as an input terminal and an output terminal of the power amplifier. The common gate amplifier circuit has a terminal connected to the common source amplifier circuit and another terminal connected to an RF output terminal, and uses a gate terminal commonly as the input terminal and the output terminal of the power amplifier. The common gate amplifier circuit includes a Doherty amplifier including a main power amplifier and an auxiliary power amplifier that is connected to the main power amplifier in parallel.

Abstract: A power amplifier according to examples includes an amplifying circuit configured to amplify an input signal, a feedback circuit configured to feedback the amplified signal to the amplifying unit, and a feedback controlling circuit configured to control a power of the fed-back signal based on a power of the input signal. The feedback controlling unit performs controlling so that the power of the fed-back signal is increased as the power of the input signal is increased.

Abstract: A power amplifier include an amplifier including at least one field effect transistor (FET) that operates in an amplifying stage configured to amplify an input signal, and a body controller configured to control a bias voltage of a body terminal of the FET based on a power of the input signal. The body controller performs controlling so that the bias voltage of the body terminal is reduced in response to the power of the input signal being increased. Accordingly, such a power amplifier exhibits improved linearity.

Abstract: A power amplifier apparatus may include an amplifier configured to amplify an input signal and a delay transferring circuit connected between an input terminal and an output terminal of the amplifier, the delay transferring circuit configured to delay the input signal to transfer the delayed input signal to the output terminal of the amplifier.

Abstract: A power amplifier includes a common source amplifier and a common gate amplifier circuit. The common source amplifier circuit has a terminal connected to a radio frequency (RF) input terminal and uses a source terminal commonly as an input terminal and an output terminal of the power amplifier. The common gate amplifier circuit has a terminal connected to the common source amplifier circuit and another terminal connected to an RF output terminal, and uses a gate terminal commonly as the input terminal and the output terminal of the power amplifier. The common gate amplifier circuit includes a Doherty amplifier including a main power amplifier and an auxiliary power amplifier that is connected to the main power amplifier in parallel.

Abstract: A direct-heat grilling pan includes a bottom plate and a sidewall formed on a circumference of the bottom plate, the bottom plate including multiple upper supports, multiple lower supports, and an edge portion. The multiple upper supports are disposed with a first horizontal interval therebetween. The multiple lower supports are disposed with a second horizontal interval therebetween, are disposed with a vertical interval from the multiple upper supports to be positioned directly under the first horizontal interval, have a width greater than the first horizontal interval, and have on top surfaces thereof concave oil-dripping grooves in which oil drips down through the first horizontal interval. The edge portion surrounds the multiple upper supports and the multiple lower supports while connecting both end portions of the multiple upper supports and both end portions of the multiple lower supports.

Abstract: A power amplifier include an amplifier including at least one field effect transistor (FET) that operates in an amplifying stage configured to amplify an input signal, and a body controller configured to control a bias voltage of a body terminal of the FET based on a power of the input signal. The body controller performs controlling so that the bias voltage of the body terminal is reduced in response to the power of the input signal being increased. Accordingly, such a power amplifier exhibits improved linearity.

Abstract: A power amplifier according to examples includes an amplifying circuit configured to amplify an input signal, a feedback circuit configured to feedback the amplified signal to the amplifying unit, and a feedback controlling circuit configured to control a power of the fed-back signal based on a power of the input signal. The feedback controlling unit performs controlling so that the power of the fed-back signal is increased as the power of the input signal is increased.

Abstract: A power amplifier apparatus may include an amplifier configured to amplify an input signal and a delay transferring circuit connected between an input terminal and an output terminal of the amplifier, the delay transferring circuit configured to delay the input signal to transfer the delayed input signal to the output terminal of the amplifier.

Abstract: Disclosed herein are a transformer and a method of manufacturing the same. The transformer includes: a primary side winding having a loop shape; a secondary side winding formed on the same plane as that of the primary side winding in a remaining section except for at least a section at which it intersects with the primary side winding and having the same loop shape as that of the primary side winding so as to be electromagnetically coupled to the primary side winding; and an intersecting section formed so that the primary side and secondary side windings having the sum of the turn numbers of 3 or more intersect with each other in a two-layer structure, wherein the intersecting section includes at least one point of intermediate node having one side connected in a first layer and the other side connected in a second layer.