Mediatek Corporation

Tai-You Lu

Der-Ping Liu

Wei-Zen Chen

A filtering device includes a low-pass filter (LPF), a noise estimation circuit and a first combining circuit. The LPF receives and filters a pre-filtering signal to generate an output signal of the filtering device. The noise estimation circuit estimates an estimated noise signal according to the output signal and the pre-filtering signal. The first combining circuit subtracts the estimated noise signal from an input signal of the filtering device to generate the pre-filtering signal.

Feed-forward filtering device and associated method

A semiconductor chip is provided. The semiconductor chip includes a first circuit, a second circuit, a third circuit, a first signal path and a second signal path. The first circuit provides a reference signal. The first signal path includes a first conductive trace and transmits the reference signal from the first circuit to the second circuit. The second signal path transmits the reference signal from the first circuit to the third circuit. Timing skews of the first and second signal paths are balanced and the first and second signal paths are routed globally.

Semiconductor chip and semiconductor chip package each having signal paths that balance clock skews

A method and an apparatus for frequency synthesizing are provided for a wireless communication system. In a frequency synthesizer, a phase lock loop (PLL) circuit generates a first elemental frequency based on a reference frequency and a unity frequency. A first division module then divides the first elemental frequency to generate a second elemental frequency. A second division module divides the second elemental frequency a multiple of times to generate the unity frequency and a plurality of intermediate frequencies each having an exponential ratio to the unity frequency by a power of two. A second mixer is provided to mix one of the intermediate frequencies with the unity frequency to generate a step frequency, and a first mixer mixes the step frequency with one of the first and second elemental frequencies to generate an output frequency having a variety covering all frequency bands in an Ultra-Wide-Band (UWB) spectrum.

Growing community of inventors

Hsinchu County, Taiwan

Tai-You Lu