Lg Electronics Inc.

Eunbit Cho

Younghee Kang

Inkyung Kim

Dongsu Won

Jaehyuk Jang

Kyungho Lim

Jihyuk Park

Byoungjoo Kang

An electronic device according to the present invention comprises: a first power amplifier for amplifying a first signal to a first power value in a first frequency band of a first communication system; and a second power amplifier for amplifying a second signal to a second power value in a second frequency band of a second communication system. The electronic device may comprise a baseband processor for: when the first and the second signal are transmitted at the same time, determining whether an average value of power values fed back from the first and the second power amplifier for a regular time interval exceeds a threshold value; and when the average value exceeds the threshold value, decreasing a gain of at least one of the first and the second power amplifier at regular time intervals.

Electronic device for performing power control

A mobile terminal includes a first power amplifier configured to amplify and output a first signal of a 5G communication system; a first antenna connected to the first power amplifier and configured to transmit the first signal amplified and output from the first power amplifier as a first transmission signal; a second power amplifier configured to amplify and output a second signal of the 5G communication system; a second antenna connected to the second power amplifier and configured to transmit the second signal amplified and output from the second power amplifier as a second transmission signal; and a power controller connected to the first power amplifier and the second power amplifier and including a common voltage booster configured to provide a supply voltage to both of the first power amplifier and the second power amplifier at a same timing.

Multi-transmission system structure and mobile terminal employing same

A mobile terminal according to the present invention includes a first power amplifier (PA) to amplify and output a first signal of a first transceiver, a power combiner to combine a second signal of the first transceiver with a third signal of the second transceiver, a second power amplifier to amplify and output a fourth signal combined by the power combiner, and a switch to select one of a first transmission signal that is an output signal of the first power amplifier and a second transmission signal that is an output signal of the second power amplifier, wherein the first transceiver operates in a first communication system and the second transceiver operates in a second communication system, whereby a mobile terminal having improved transmission output power characteristics can be provided using the first communication system and the second communication system.

Multiple transmit system structure and mobile terminal having the same

A mobile terminal according to the present invention includes a transceiver to operate in a first communication system and a second communication system, a first antenna to transmit or receive a first signal of the first communication system, a second antenna to transmit or receive a second signal of the second communication system, and a signal attenuator module to perform signal attenuation for the first signal on a path between the second antenna and a low noise amplifier (LNA) of the second communication system, whereby system damage in a non-synchronized state between the first and second communication systems can be avoided.

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Seoul, South Korea

Eunbit Cho