Realtek Semiconductor Inc.

Chia-Yi Lee

Ka-Un Chan

Chia-Jun Chang

Kuan-Yu Shih

Yang Chang

Ping-Hsuan Tsai

A radio frequency transceiver device includes an antenna unit, a first matching circuit, a receiver circuit, a second matching circuit, a transmitter circuit, and an auxiliary circuit. The receiver circuit includes a mixer unit. The auxiliary circuit includes a first transformer coil and a second transformer coil. The first matching circuit and the receiver circuit are configured to form a first signal reception channel to receive, process, and transmit the first radio frequency signal to the mixer unit when the first radio frequency signal is a high gain radio frequency signal. The second matching circuit and the auxiliary circuit are configured to form a second signal reception channel to receive, process, and transmit the first radio frequency signal to the mixer unit when the first radio frequency signal is a middle-low gain radio frequency signal. Another radio frequency signal transceiver device further includes a third matching circuit.

Radio frequency transceiver device

An inductor device includes a first inductor, a second inductor, and at least one switch circuit. The second inductor is arranged to enclose the first inductor, and use a topmost layer metal to resist external interference for the first inductor. The at least one switch circuit is coupled to the second inductor, and is arranged to receive at least one control voltage, wherein the at least one control voltage is arranged to adjust conduction degree of the at least one switch circuit.

Inductor device that can resist external interference and adjust inductance value and quality factor of inductor

A low noise amplifier circuit includes an input stage circuit, a first output stage circuit, and a second output stage circuit. The input stage circuit is configured to receive an input signal and to generate a bias signal. The first output stage circuit corresponding to a first wireless communication and is configured to be biased according to the bias signal and a first control signal, in order to generate a first output signal, in which the first control signal is for setting a first gain of the first output stage circuit. The second output stage circuit corresponding to a second wireless communication and is configured to be biased according to the bias signal and a second control signal, in order to generate a second output signal, in which the second control signal is for setting a second gain of the second output stage circuit.

Low noise amplifier circuit having multiple gains

A transceiver device includes a digital baseband circuit, a first circuit portion, and a second circuit portion. The digital baseband circuit is configured to analyze power of an input signal, in order to generate a first control signal and a second control signal. The first circuit portion has a first gain, and is configured to be selected according to the first control signal to process the input signal to generate output signals. The second circuit portion has a second gain higher than the first gain, and is configured to be selected according to the second control signal to process the input signal to generate the output signals. The first circuit portion includes an N-way filter circuit, and the N-way filter circuit is configured to modulate the input signal according to first oscillating signals to perform a filtering operation.

Transceiver device

A wireless transceiver device includes an antenna unit for receiving a first RF signal or transmitting a second RF signal. A first matching unit is connected to the antenna unit and a receiving circuit. The first matching unit and the receiving circuit form a first signal receiving channel for receiving the first RF signal when the first RF signal is a high/low gain RF signal. A second matching unit is connected to the antenna unit and a transmitting circuit. The second matching unit and the transmitting circuit form a signal transmitting channel for transmitting the second RF signal. A bypass coupling circuit is connected to the receiving circuit and the second matching unit. The second matching unit, the bypass coupling circuit, and the receiving circuit form a second signal receiving channel for receiving the first RF signal when the first RF signal is a middle gain RF signal.

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Hsinchu, Taiwan

Chia-Yi Lee