Mediatek Corporation

Ying-Tsang Lu

Chih-Ming Hung

Chinq-Shiun Chiu

Meng-Chang Lee

Yuan-Yu Fu

Yen-Hung Kuo

A multi-mixer system includes an amplifier module and a plurality of channels. The amplifier module is arranged for receiving signals from an antenna or antenna arrays to generate a plurality of radio frequency (RF) input signals. The plurality of channels are coupled to the amplifier module, wherein the plurality of channels receive the RF input signals, respectively, and each of the channels includes a mixer for mixing one of the RF input signals with a local oscillating signal to generate a mixed signal. In addition, at least one of the channels includes an interference reduction circuit positioned between the amplifier module and the mixer.

Multi-mixer system and method for reducing interference within multi-mixer system

In accordance with an embodiment, a feedforward filter includes a first path, at least one second path and a signal combiner. The first path has a first translational filter, and employed for providing a first frequency response and generating a first output in response to an input signal based on the first frequency response. The at least one second path has a second translational filter and is coupled to the first path. The at least one second path is employed for providing a second frequency response that is different from the first frequency response to the input signal, and generating at least one second output in response to the input signal based on the second frequency response. The signal combiner is coupled to the first path and the second path, and employed for combining the first output and the at least one second output to generate a filtered signal.

Feedforward filter using translational filter

A harmonic translational filter includes a first path, a second path and a signal combiner. The first path has a first translational filter that is driven by a plurality of first oscillation signals, and is arranged to generate a first output signal according to an input signal. The second path has a second translation filter that is driven by a plurality of second oscillation signals that are different from the first oscillation signals in phase. The second path is coupled to the first path and arranged to generate a second output signal according to the input signal. The signal combiner is coupled to the first path and the second path, and arranged to combine the first output signal and the second output signal to generate a filtered signal.

Harmonic rejection translational filter

A receiver is provided to support a plurality of carrier aggregation modes. The receiver includes a low-noise amplifier (LNA) module including a plurality of LNAs, wherein the LNAs are arranged to receive input signals from a plurality of input ports, respectively, and each of the LNAs generates and outputs a plurality of noise-cancelled signals at a plurality of output terminals of the LNA module.

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Hsinchu County, Taiwan

Ying-Tsang Lu