Realtek Semiconductor Inc.

Wen-Shan Wang

Yuan-Shuo Chang

Ting-Ying Wu

Gerchih Chou

Ruey-Beei Wu

Chin-Liang Wang

Ying-Hsi Lin

Shih-Hung Wang

Min-Chau Jan

Chao-Cheng Lee

Ming-Chun Hsu

Chih-Chieh Wang

Shen-Kuo Huang

Chin-Yuan Lo

Chien-I Chou

Wu-Chi Wang

Kiat-Seng Yeo

Hang Liu

Cheng-Lin Wu

Po-Chun Chen

Yu-Cong Wang

Kuan-Kai Chen

A signal predistortion circuit configuration includes a digital predistortion circuit, a first transceiver, a first analog front-end (AFE) circuit, a second transceiver, and a second AFE circuit. The digital predistortion circuit outputs a first transmission signal according to first predistortion parameters and outputs a second transmission signal according to second predistortion parameters, and the digital predistortion circuit determines whether to adjust the first predistortion parameters according to a first reception signal and determines whether to adjust the second predistortion parameters according to a second reception signal. A transmitting circuit of the first transceiver, the first AFE circuit, and a receiving circuit of the second transceiver jointly generates the first reception signal according to the first transmission signal. A transmitting circuit of the second transceiver, the second AFE circuit, and a receiving circuit of the first transceiver jointly generates the second reception signal according to the second transmission signal.

Signal predistortion circuit configuration

The present invention discloses a power amplification apparatus having a digital pre-distortion mechanism that includes a digital pre-distortion circuit and a power amplifier. The digital pre-distortion circuit receives an original digital signal having an original real part and an original imaginary part. When a first one and a second one of the original real part and the original imaginary part are a low state voltage level and a high state voltage level, the digital pre-distortion circuit outputs a first and a second voltage levels equivalent to the low state voltage level as a first pre-distortion part and directly outputs the second one of the original real part and the original imaginary part as a second pre-distortion part to generate an input signal having an input real part and an input imaginary part each corresponding to one of the first pre-distortion part and the second pre-distortion part. The power amplifier receives the input signal to perform power amplification to generate an output signal.

Power amplification apparatus and method having digital pre-distortion mechanism

A transmitter device includes a transmitter including a first oscillator circuitry, a signal processing circuitry, and a calibration circuitry, and a second oscillator circuitry. The first oscillator circuitry is configured to output a first oscillating signal. The signal processing circuitry is configured to mix calibration signals according to the first oscillating signal, in order to emit a first output signal. The calibration circuitry is configured to detect a power of the first output signal to generate coefficients, and generate the calibration signals according to the coefficients, an in-phase data signal, and a quadrature data signal. The second oscillator circuitry is disposed adjacent to the transmitter, and is configured to output a second oscillating signal. The calibration signals are configured to reduce a pulling generated by both of the first output signal and the second oscillating signal to the first oscillator circuitry.

Signal transmitter device and calibration method

A signal compensation device is disclosed. The signal compensation device includes an operation circuit and a modulation circuit. The operation circuit is configured to generate a control signal according to a first data signal and a second data signal, in which the second data signal is generated according to the first data signal by a signal conversion circuit. The modulation circuit is configured to provide a loop gain according to the control signal to compensate an attenuation of the signal conversion circuit.

Signal compensation device

Disclosed is a device capable of compensating for amplitude-modulation to phase-modulation distortion. The device includes a transmitter and a controller. The transmitter includes an amplifier circuit, a phase-shift adjustment circuit, and an output circuit. The amplifier circuit is configured to output an amplified signal according to an input signal. The phase-shift adjustment circuit, set between the amplifier circuit and the output circuit, includes at least one of an adjustable capacitor and an adjustable inductor and is configured to adjust the phase shift of the amplified signal according to a control signal. The output circuit is configured to output an output signal according to the amplified signal. The controller is configured to generate the control signal according to the input signal, in which the control signal varies with the input signal.

Device capable of compensating for amplitude-modulation to phase modulation distortion

A 3D electromagnetic bandgap circuit includes: a dielectric layer having a first surface and an opposing second surface; a spiral element positioned on the first surface; a first surrounding element positioned on the first surface and surrounding the spiral element, but does not touch with the spiral element; a plane element positioned on the second surface and including a notch; a second surrounding element positioned on the second surface and surrounding the plane element, but does not touch with the plane element, wherein the second surrounding element further includes a protruding portion extending toward the notch; a first via passing through the dielectric layer, the spiral element, and the protruding portion; a second via passing through the dielectric layer, the plane element, and the first surrounding element; and a third via passing through the dielectric layer, the plane element, and the first surrounding element.

3D electromagnetic bandgap circuit

A memory controller adjusts impedance matching of an output terminal and outputs a control signal that controls a memory through the output terminal. The memory controller includes a first driving and impedance matching circuit, a second driving and impedance matching circuit, and a logic circuit. The logic circuit, which is coupled to the first driving and impedance matching circuit and the second driving and impedance matching circuit, sets a first impedance and a first driving capability of the first driving and impedance matching circuit, sets a second impedance and a second driving capability of the second driving and impedance matching circuit, and enables the first driving and impedance matching circuit to cause the control signal to have a first level or enables the second driving and impedance matching circuit to cause the control signal to have a second level different from the first level.

Memory controller with adjustable impedance for output terminal

A transmitter with compensating mechanism of pulling effect includes an output unit and a correction unit. The output unit mixes a first correction signal and a second correction signal according to an oscillating signal to generate a modulated signal, and to amplify the modulated signal to generate a first output signal. The correction unit analyzes the power of the first output signal to generate a first coefficient and a second coefficient, and generate the first correction signal and the second correction signal according to the first coefficient, the second coefficient, an in-phase data signal, and a quadrature data signal.

Transmitter with compensating mechanism of pulling effect

A transmitting device, for handling signal interference, comprises a first transmitting circuit, for processing a first plurality of baseband signals, to generate a first plurality of radio frequency signals; a second transmitting circuit, for processing a second plurality of baseband signals and a plurality of input signals, to generate a second plurality of radio frequency signals; a feedback circuit, coupled to the second transmitting circuit, for processing the second plurality of radio frequency signals and a plurality of leakage signals, to generate a plurality of error signals; and a control circuit, coupled to the first transmitting circuit, the second transmitting circuit and the feedback circuit, for generating the plurality of input signals according to the first plurality of baseband signals and the plurality of error signals.

Device and method of handling signal interference

A method of interference cancellation includes the following steps: performing a take-energy operation on a to-be-sent signal at multiple times to generate multiple to-be-sent signal powers; performing a first high-pass operation on the to-be-sent signal powers to generate a to-be-sent high-pass result; performing a second high-pass operation on a received signal to generate a received high-pass result; adjusting multiple filter coefficients according to the to-be-sent high-pass result and the received high-pass result; and generating a recover signal according to the filter coefficients.

Method of interference cancellation and transceiving device

A Ball Grid Array (BGA) formed on printed circuit board is provided. The BGA comprises a first solder ball module and a second solder ball module. The first solder ball module comprises a plurality of first solder balls, wherein one of the first solder balls is grounded for shielding two other first solder balls, and one of the first solder balls is floating. The second solder ball module comprises a plurality of second solder balls, wherein two of the second solder balls are grounded and one of the two grounded second solder balls penetrates the printed circuit board through a plated through hole formed on the printed circuit board for shielding two first solder balls among the first solder balls.

Ball grid array formed on printed circuit board

Disclosed is a two-capacitor-based filter design method comprising: determining a frequency fand a fractional bandwidth ratio FBW; selecting a first and a second capacitors according to fand FBW, in which a resonant frequency fof the first capacitor is equal to f&#xd7;(1&#x2212;N&#xd7;FBW), a resonant frequency fof the second capacitor is equal to f&#xd7;(1+M&#xd7;FBW), and each of N and M is a positive number less than one; and determining a length of a first transmission line according to fand a signal speed, and determining a length of a second transmission line according to fand the signal speed. The first capacitor is coupled between a center of the first transmission line and ground, the second capacitor is coupled between a center of the second transmission line and ground, and the first and second transmission lines are connected in series.

Two-capacitor-based filter design method and two-capacitor-based filter

The present invention discloses an integrated circuit having electromagnetic shielding capability and the manufacturing method thereof. An embodiment of the said integrated circuit comprises: a semiconductor circuit structure including a first surface which covers an electromagnetic radiation area; an electromagnetic shielding layer covering the first surface and including at least one contact; and at least one conducting path operable to electrically connect the at least one contact with a steady voltage and thereby shield off the electromagnetic wave from the electromagnetic radiation area, wherein the current running through the electromagnetic shielding layer is zero or less than the maximum current running through the electromagnetic radiation area.

Integrated circuit having electromagnetic shielding capability and manufacturing method thereof

A device for compensating impedance and gain of a transmission interface is provided. The device includes a correcting and compensating unit, a clock data recovering unit, a decoder, a calculating unit, and an adaptive control unit. The correcting and compensating unit is used to receive a channel signal, and compensate the channel signal according to a control signal to generate a compensation signal. The clock data recovering unit is used to receive the compensation signal and generate a data signal. The decoder is used to decode the data signal and perform detection to generate error information and correct information. The calculating unit is used to count times of generating the error information and times of generating the correct information to accordingly generate reference data. The adaptive control unit is used to receive the reference data and perform calculation to generate the control signal.

Device and method for compensating impedance and gain of transmisson interface

Filter coefficients are generated by testing a wireless communication system using single-tone signals. While using the filter coefficients in a filter module, signal imbalance caused by a local oscillator or analog elements in a wireless communication system can be eliminated, so as to prevent the wireless communication system from being affected by the noises.

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Tainan, Taiwan

Wen-Shan Wang