Realtek Semiconductor Inc.

Ming-Chung Huang

Yuan-Shuo Chang

Ruey-Beei Wu

Ying-Hsi Lin

Chun-Ming Huang

Tzu-Ming Kao

Ting-Ying Wu

Shih-Hung Wang

I-Hua Tseng

Xinglong Liu

A power line structure includes a dielectric layer, a first conductive component, a second conductive component, and a third conductive component. The first conductive component is disposed at a first side of the dielectric layer. The second conductive component is disposed at the first side of the dielectric layer. The third conductive component is disposed at the first side of the dielectric layer and between the first conductive component and the second conductive component. Each of the voltage of the first conductive component and the second conductive component is equal to a ground voltage. The third conductive component is configured to receive a first power voltage.

Power line structure

A signal adjustment device includes a frequency adjustment circuit, a filter circuit, and a power estimation circuit. The frequency adjustment circuit is configured to receive a two-tone signal from a signal generator and to generate a first signal according to the two-tone signal, wherein the signal generator generates the two-tone signal according to a first coefficient and a second coefficient. The filter circuit is configured to filter the first signal, in order to generate a second signal. The power estimation circuit is configured to detect a power of an intermodulation distortion from the third order signal component, which is associated with the two-tone signal, in the second signal, and to adjust at least one of the first coefficient and the second coefficient according to the power, in order to reduce the power.

Signal adjustment device and signal adjustment method

A signal compensation device comprises a first filter circuit, for processing a broadband signal, to generate a first analog time-domain signal; a second filter circuit, for processing the broadband signal, to generate a second analog time-domain signal; a first transform circuit, for transforming the first analog time-domain signal to a first digital time-domain signal; a second transform circuit, for transforming the second analog time-domain signal to a second digital time-domain signal; a third transform circuit, for transforming the first digital time-domain signal to a first frequency-domain signal; a fourth transform circuit, for transforming the second digital time-domain signal to a second frequency-domain signal; and a processing circuit, for generating a time-domain compensation response according to the first frequency-domain signal and the second frequency-domain signal.

Device and method of performing signal compensation

A receiving circuit includes: a first receiving terminal for receiving a RF signal; a second receiving terminal for receiving an external oscillating signal generated by an external oscillator; a low-noise amplifier coupled with the first receiving terminal and the second receiving terminal and utilized for generating an output signal; a first switch element positioned between the second receiving terminal and the low-noise amplifier; an in-phase signal processing circuit for generating an in-phase detection signal based on the output signal; an quadrature signal processing circuit for generating an quadrature detection signal based on the output signal; and a calibration circuit for controlling the first switch element and capable of performing an I/Q mismatch calibration operation according to the in-phase detection signal and the quadrature detection signal when the first switch element is turned on.

Receiving circuit capable of performing I/Q mismatch calibration based on external oscillating signal

The present invention discloses a wireless signal receiving device and method capable of receiving three or more signals of different central frequencies. An embodiment of said device comprises: a receiving circuit operable to generate a reception signal according to a wireless signal including a first, second, and third wireless signals of different central frequencies; a mixer operable to generate a mixing signal by processing the reception signal according to an oscillation clock in which the mixing signal includes a first, second and third intermediate-frequency (IF) signals and the central frequency of the third IF signal is higher than the other two; and a digital signal generating circuit operable to generate a first, second and third digital signals by processing the first, second and third IF signals according to a sampling frequency in which the sampling frequency is lower than two times the maximum frequency of the third IF signal.

Wireless signal receiving device and method

A method for detecting frequency offset of an oscillator includes: receiving an oscillation signal having an oscillation frequency; generating a self-mixing signal according to the oscillation signal; performing frequency division upon the self-mixing signal to obtain a down-converted self-mixing signal; obtaining a down-converted self-mixing frequency corresponding to a maximum power in a specific frequency range of the down-converted self-mixing signal; and computing a frequency offset of the oscillation frequency according to at least the oscillation frequency and the down-converted self-mixing frequency. A related circuit is also disclosed.

Method for detecting frequency offset of oscillator and associated circuit

An oscillating frequency drift detecting method, which comprises: receiving an oscillating signal with an oscillating frequency, wherein the oscillating signal is generated by a crystal oscillator; generating a self-mixing signal according to the oscillating signal; obtaining a self-mixing frequency of a maximum power of the self-mixing signal in a specific frequency range; and computing a frequency drift of the oscillating frequency, according to the self-mixing frequency of the maximum power, and the oscillating frequency.

Circuit and method for detecting oscillating frequency drift

The present invention discloses a method for adjusting a tunable compensation filter within a communication device. The method includes the following steps: generating at least a detecting signal according to at least a pole of the tunable compensation filter; generating a transmitted signal according to the detecting signal; receiving the transmitted signal via a loop switch; generating a filtered signal by filtering the transmitted signal; generating a received signal by compensating the filtered signal; generating at least an indicating signal by comparing the detecting signal with the received signal; and determining whether to adjust at least a coefficient of the tunable compensation filter or not according to the indicating signal.

Apparatus with tunable filter and related adjusting method

A method for determining pre-distortion of a power amplifier includes the following steps: providing a first power input signal to make the power amplifier generate a first power output signal; receiving a first receiving signal, which is acquired according to the first power output signal; detecting a predetermined gain of the power amplifier by means of the first power input signal and the first receiving signal; providing a second power input signal to make the power amplifier generate a second power output signal; receiving a second receiving signal, which is acquired according to the second power output signal; determining pre-distortion amplitude values and pre-distortion phase values of the power amplifier by means of the predetermined gain, the second power input signal and the second receiving signal.

Compensation device applied to power amplifier, method for determining pre-distortion of power amplifier, and method for compensating linearity of power amplifier thereof

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Taichung, Taiwan

Ming-Chung Huang