Realtek Semiconductor Inc.

Meng-Han Hsieh

Chi-Shun Weng

Kuang-Yu Yen

Hou-Wei Lin

Ming-Je Li

Shieh-Hsing Kuo

Liang-Wei Huang

Chien-Chih Chen

Kai-Yi Fang

Ming-Yuh Yeh

Jung-Tang Chiang

Rong-Jen Chang

Kai-Li Lee

A method applied to a wired network including a first network device and a second network device is disclosed. The first and second network devices each include a first set of connection ends and a second set of connection ends. Firstly, the first network device transmits a specific signal pattern through its first set and second set of connection ends. Then, the first network device detects whether a signal is received at its first set and second set of connection ends. If it is determined that a signal is not received at the first set connection ends while a signal is received at the second set connection ends, the first network device determines that its second set of connection ends is not correctly coupled to the second set of connection ends of the second network device.

Method for determining connection status of wired network

An integrated circuit is disclosed, including at least one configuration pin, an interface circuit, a detecting circuit, a determining circuit and a storage unit. A physical layer circuit of the invention not only increases the flexibility of setting PHY addresses, but also reduces the number of configuration pins.

Circuit and method for setting data and their application to integrated circuit

The present invention provides an configuration setting device of integrated circuit and the configuration setting method thereof, in which the configuration setting device comprises a signal receiving terminal, a voltage output unit coupled to the signal receiving terminal, and a detector coupled to the signal receiving terminal. The signal receiving terminal is used to receive the input signal at the outer of the integrated circuit, and the voltage output unit generated at the inner of the integrated circuit is used to output a voltage signal based on the enable signal, and the detector is used to detect a level at the signal receiving terminal to output a configuration signal; wherein, the signal level generated at the signal receiving terminal is determined by the input signal and the voltage signal.

Configuration setting device of integrated circuit and the configuration setting method thereof

A device for allocating a number of taps of a designated finite impulse response filter is disclosed. The device comprises a plurality of designated finite impulse response filters having fixed number of taps, a plurality of allocation finite impulse response filters having fixed number of taps, a control unit and an estimate unit. Depending on intensities of responses to interferences, at least one of the allocation FIR filters may be coupled in series to any one of the designated finite impulse response filters, thereby to provide a signal having excellent quality.

Order adaptive finite impulse response filter and operating method thereof

A method for generating a spread spectrum clock includes the steps of providing a reference clock having a reference period; generating a plurality of output clocks respectively having different phases according to the reference clock; generating a first/second control signal according to the reference clock and a spread spectrum clock and starting a first/second duration accordingly; during the first/second duration, outputting a first/second selecting signal representing a first/second predetermined sequence according to the first/second control signal, wherein the second predetermined sequence is a substantial reversed sequence of the first predetermined sequence; and during the first/second duration, sequentially outputting some or all of the output clocks as the spread spectrum clock according to the first/second predetermined sequence.

Method for generating a spread spectrum clock and apparatus thereof

The invention provides a method for testing a transmission medium used in a full-duplex communication system comprising an endpoint that comprises a transmitting end (TX) and a receiving end (RX); the method comprises the steps of: first, transmitting a transmitted signal which comprises a test signal sequence with a high auto-correlation characteristic; then, receiving a received signal, and performing a correlation operation on the test signal and the received signal; finally, according to the result of the correlation operation, determining the impedance matching condition of the transmission medium.

Transmission medium testing apparatus and method

A deinterleaving device includes a memory space, the memory space being divided into a plurality of N segments with different lengths respectively. A method of accessing data in a deinterleaving device, the method including performing the following steps during a first time cycle: reading first read data from a first address of a first segment; reading second read data from a first address of a second segment, and writing first write data into the first address of the second segment; reading third read data from a first address of a third segment, and writing second write data into the first address of the third segment; repeating the above reading and writing steps until reading Nread data from a first address of an Nsegment, and writing N&#x2212;1write data into the first address of the Nsegment; writing Nwrite data into the first address of the first segment.

Method of accessing data in a deinterleaving device

A configuration setting circuit and the method thereof, in which the configuration setting circuit includes a clock generator, a plurality of terminals, and a frequency detector coupled to a terminal. The clock generator is used to generate multiple clock signals with different frequencies, and output through the terminals. One input signal is inputted to the frequency detector through the terminal coupled to the frequency detector, so that the frequency detector can output at least two-bit configuration signal corresponding to the frequency of the input signal to set the operation mode.

Configuration setting circuit and configuration setting method thereof

An automatic voltage control circuit controls a power supply unit to adjust a supply voltage provided by the power supply unit. The automatic voltage control circuit includes an oscillating unit, a frequency-comparing unit, and a control unit. The oscillating unit generates an oscillating signal. The frequency-comparing unit compares the oscillating frequency of the oscillating signal with at least one predetermined threshold frequency. The control unit controls the power supply unit to adjust the supply voltage according to the comparing result generated by the frequency-comparing unit.

Automatic voltage control circuit and method thereof

The apparatus for communication channel estimation device of the present invention includes: a frequency response square computing circuit, to generate a first frequency response corresponding to a first frequency and a second frequency response corresponding to a second frequency according to a input signal, and to square the first and the second frequency response; and an estimating circuit, to estimate a channel length according to the squares of the first frequency and the second frequency response. Wherein the input signal is transmitted in a symbol rate and the first frequency and the second frequency are 1/M and 1/N times of the symbol rate respectively, wherein M and N are in the order of 2.

Ethernet channel estimation device and method

An initialization method for a network system is disclosed, which uses a channel estimation to predetermine coefficients of an FFE and an FBE. As such, convergence of the FFE, the FBE, a timing recovery, an echo canceller and a NEXT canceller is speeded up. Also, interaction of the cited devices and a divergence caused by the interaction are avoided. Therefore, system performance and stability are increased.

Initialization method for a network system

A transceiver of a communication system is disclosed. The transceiver is implemented by a demodulation apparatus including a front-end receiver, a noise canceller, a feedforward equalizer (FFE) and a decoding system. The front-end receiver receives a remote signal and converts it into a first signal with a pre-cursor and a post-cursor in digital form. The noise canceller is coupled to the front-end receiver for subtracting a noise signal from the first signal and thus generates a second signal. The FFE is coupled to the noise canceller for eliminating the pre-cursor in the second signal and thus generates a third signal. The decoding system is coupled to the FFE for decoding the third signal and eliminating the post-cursor in the third signal.

Demodulation apparatus for a network transceiver and method thereof

A transceiver of a communication system is disclosed. The transceiver comprises a front-end receiver for receiving a receiving signal and converting to a first signal with a pre-cursor component and a post-cursor component, a noise canceller coupled to the front-end receiverfor generating a second signal through eliminating the noise of the first signal, a Feed-Forward Equalizer (FFE) coupled to the noise canceller for generating a third signal through eliminating the pre-cursor component in the second signal according to a transfer function including a plurality of adjustable constants, wherein the adjustable constants includes a main-tap and the value of the main-tap is predetermined, and a decoding system coupled to the FFE for decoding the third signal and eliminating the post-cursor component in the third signal.

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Hsinchu, Taiwan

Meng-Han Hsieh