Samsung Electronics Co., Ltd.

Qing Liu

Taewan Kim

Chia-Hsin Wu

Dae Hyun Kwon

Hui Changhsiang

A transmitter device which transmits a first transmit signal and a second transmit signal having different wireless communication standards. The transmitter device includes a power amplifier that amplifies the first transmit signal in a first transmission mode. A first impedance circuit provides the amplified first transmit signal to a radio frequency output port. A second impedance circuit is connected to the first impedance circuit and provides an additional impedance to the first impedance circuit in the first transmission mode. A first switch provides the second transmit signal to the first impedance circuit in a second transmission mode. A second switch connects the second impedance circuit and a ground in the first transmission mode, and floats the second impedance circuit in the second transmission mode.

Transmitter device and transceiver device for transmitting different wireless standard signal

A transmitter device which transmits a first transmit signal and a second transmit signal having different wireless communication standards. The transmitter device includes a power amplifier that amplifies the first transmit signal in a first transmission mode. A first impedance circuit provides the amplified first transmit signal to a radio frequency output port. A second impedance circuit is connected to the first impedance circuit and provides an additional impedance to the first impedance circuit in the first transmission mode. A first switch provides the second transmit signal to the first impedance circuit in a second transmission mode. A second switch connects the second impedance circuit and a ground in the first transmission mode, and floats the second impedance circuit in the second transmission mode

Provided are a semiconductor device and an operating method thereof. A semiconductor device includes a mixer configured to upconvert a baseband signal using a local oscillator (LO) signal; and a notch filter configured to receive the upconverted signal from the mixer and filter notch frequency components, the notch filter further configured to resonate at a fundamental frequency to provide a higher impedance and resonate at a notch frequency different from the fundamental frequency to provide a lower impedance.

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Suwon-si, South Korea

Qing Liu