Patents Assigned to Ralink Technology Corporation
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Patent number: 9065542Abstract: A Radio Frequency (RF) front end system and method are disclosed. The RF front end system comprises an antenna, a matching network coupled to the antenna, a power amplifier (PA) coupled to the matching network via a port on a transmit path, a low noise amplifier (LNA) coupled to the matching network via the port on a receive path and at least one transmit/receive switch (T/R SW) coupled between the port and at least one of the PA and LNA.Type: GrantFiled: August 5, 2011Date of Patent: June 23, 2015Assignee: RALINK TECHNOLOGY CORPORATIONInventors: Yuen Hui Chee, Albert Chia-Wen Jerng
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Patent number: 9058152Abstract: The present invention discloses a wireless communication module, comprising a substrate; at least one wireless module, disposed on the substrate; and a module which does not emit wireless signals can be disposed on the substrate as well. The wireless communication module forms a compact structure and removes the need for RF shielded coaxial cables within the communication module. The present invention further discloses a portable device, which comprises a display part comprising a communication module; and a host part coupled to the display part; wherein the communication module is deposited on top of display part for better reception.Type: GrantFiled: November 30, 2009Date of Patent: June 16, 2015Assignee: RALINK TECHNOLOGY CORPORATIONInventors: Shao-Chin Lo, Min-Chung Wu, Xin-Chang Chen
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Publication number: 20140269309Abstract: A method and a communication device for managing communication traffic for multiple communication technologies are provide. The method, performed by a communication device to manage communications with a first and a second network having a first and a second communication technology, respectively, includes: determining, by a second communication module, whether a first transmission of the first communication technology is in progress before proceeding with a second transmission having the second communication technology; when the first transmission is in progress, initiating, by a second communication module, an unavailable period of the first communication technology; initiating, by a second communication module, notification of the unavailability of the first communication technology to the first network; and proceeding, by the second communication module, with the second transmission.Type: ApplicationFiled: March 18, 2013Publication date: September 18, 2014Applicant: RALINK TECHNOLOGY CORPORATIONInventors: Yu-Ju LEE, I-Feng SU, Hao-Sheng HSU, Pao-Chen WU
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Patent number: 8751803Abstract: A method for auto provisioning for a communication device in a wireless communication network comprises the steps of: receiving a request from a station; determining the validity of the request according to a verification code carried by the request; sending a response to the station; receiving a security message from the station; retrieving a security key carried by the security message; and executing network provisioning according to the security key.Type: GrantFiled: July 23, 2010Date of Patent: June 10, 2014Assignee: Ralink Technology CorporationInventors: Hsueh Chen Lee, Cheng Tsung Tai
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Patent number: 8604882Abstract: A circuit for single ended to differential conversion is disclosed. The circuit comprises a source for providing a single ended signal; and a transformer for receiving the single ended signal. The transformer includes first and second inductors. The first and second inductors are mutually coupled. When the operating frequency changes, a phase difference of currents flowing through the inductors changes, and therefore a phase difference between effective impedance of the first and second inductors changes to maintain a substantially 180 degree phase difference due to the mutual coupling.Type: GrantFiled: August 3, 2011Date of Patent: December 10, 2013Assignee: Ralink Technology CorporationInventor: Eric Chiyuan Lu
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Patent number: 8576944Abstract: A signal transmitting apparatus for orthogonal frequency division multiplexing (OFDM) system comprises a compandor, a predistortor, a power amplifier and a feedback module. The compandor is configured to compress and expand a transmitted signal. The predistortor is configured to perform a predistortion operation on output signals of the compandor. The power amplifier is configured to amplify output signals of the predistortor. The feedback module is configured to adjust parameters of the compandor and the predistortor based on a feedback signal.Type: GrantFiled: April 3, 2009Date of Patent: November 5, 2013Assignee: Ralink Technology CorporationInventors: Jiunn Tsair Chen, Yun Shen Chang, Chih Hung Lin
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Patent number: 8559571Abstract: An embodiment of the present invention includes a calibration system employed in a multi-input-multi-output (MIMO) system for beamforming and receiving a plurality of streams. The system includes a first calibration circuit responsive to inphase (I) and quadrature (Q) pairs of stream and operative to calibrate each I and Q pair and a second calibration circuit responsive to the calibrated I and Q pairs for all streams, wherein the first and second calibration circuits perform calibration in the time domain.Type: GrantFiled: August 17, 2007Date of Patent: October 15, 2013Assignee: Ralink Technology CorporationInventors: Chien-Cheng Tung, Thomas Edward Pare, Jr.
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Method of establishing virtual USB interface for non-USB apparatus and the non-USB apparatus thereof
Patent number: 8549206Abstract: A method of establishing a virtual USB interface for a non-USB device, comprising the steps of establishing a non-USB interface to communicate with the non-USB device, generating a virtual USB physical device object to provide a USB transport layer driver, establishing the virtual USB interface to communicate with the USB transport layer driver, filtering a transmitting command of the USB transport layer driver based on the virtual USB interface, and filtering a returned information of the non-USB device based on the non-USB interface.Type: GrantFiled: September 8, 2011Date of Patent: October 1, 2013Assignee: Ralink Technology CorporationInventors: Hao Sheng Hsu, Chiung Hsun Hsu, Jih Chun Tsai -
Patent number: 8543059Abstract: A combo wireless system comprises a Bluetooth module, a wireless fidelity (WiFi) module, a single pole triple throw (SP3T) switch and an antenna. The antenna is utilized to transmit/receive Bluetooth signals for the Bluetooth module and to transmit/receive WiFi signals for the WiFi module. The SP3T switch is coupled between the antenna, the Bluetooth module and the WiFi module. The SP3T switch is controlled to select a path for the Bluetooth module to transmit/receive Bluetooth signals through the antenna, to select another path for the WiFi module to transmit WiFi signals through the antenna or to select another path for the WiFi module to receive the WiFi signals through the antenna.Type: GrantFiled: May 24, 2010Date of Patent: September 24, 2013Assignee: Ralink Technology CorporationInventors: Kun Yuan Hsiao, Hsin Yin Lee
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Patent number: 8502576Abstract: A charge pump circuit includes a charge generation circuit, a tracking circuit, a replica circuit, and a main charge pump. The main charge pump generates a charge current and a discharge current to a subsequent loop filter according to a UP signal and a DOWN signal. The replica circuit generates a first voltage in response to the current values of the first current source and the second current source of the main charge pump. The tracking circuit adjusts the current values of the first current source and the second current source of the main charge pump according to the first voltage and a second voltage, wherein the second voltage is in response to a voltage of an output node of the main charge pump.Type: GrantFiled: September 23, 2011Date of Patent: August 6, 2013Assignee: Ralink Technology CorporationInventor: Yi Bin Hsieh
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Patent number: 8488607Abstract: A system with WLAN link aggregation comprises an access point, a station and a remote host. The station is equipped with a first network interface unit and a second network interface unit. The first network interface unit and the second network interface unit are configured to forward packets to or receive packets from the access point. After receiving packets from the first network interface unit, the second network interface unit or the remote host, the access point modifies headers of the packets and forwards the packets to the first network interface unit, the second network interface unit or the remote host.Type: GrantFiled: September 15, 2010Date of Patent: July 16, 2013Assignee: Ralink Technology CorporationInventors: Chia Hsiang Hsu, Tsung Yuan Pan
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Patent number: 8471777Abstract: An antenna apparatus comprises a planar monopole antenna device and an extending layer. The planar monopole antenna device includes an electromagnetic shielding box. The extending layer is composed of electric conducting material and extends outward from a feed point of the electromagnetic shielding box.Type: GrantFiled: October 18, 2010Date of Patent: June 25, 2013Assignee: Ralink Technology CorporationInventors: Junn Yi Lin, Xin Chang Chen
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Patent number: 8416034Abstract: A signal splitting apparatus comprises a micro-strip line, a first inductor and a second inductor. A first end and a second end of the micro-strip line are grounded via a first capacitor and a second capacitor, respectively. The first end and the second end of the micro-strip line are electrically coupled to a receiving part of a transceiver and a transmitting part of the transceiver, respectively. One end of the first inductor is coupled to the first end of the micro-strip, and the other end of the first inductor is electrically coupled to an antenna module and grounded via a third capacitor. One end of the second inductor is coupled to the second end of the micro-strip, and the other end of the second inductor is electrically coupled to the antenna module.Type: GrantFiled: October 13, 2010Date of Patent: April 9, 2013Assignee: Ralink Technology CorporationInventors: Shen Yi Liao, Shao Chin Lo
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Publication number: 20130038422Abstract: A method and system for reducing the temperature of a communication system are disclosed. The method and system comprise detecting a temperature of the communication system. The method and system further includes providing a signal based upon the detected temperature, and determining a desired idle time between transmit packets based upon the signal. Finally, the method and system includes sending the desired idle time between transmit packets to the communication system.Type: ApplicationFiled: August 11, 2011Publication date: February 14, 2013Applicant: Ralink Technology CorporationInventor: Keng Leong FONG
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Publication number: 20130033312Abstract: A circuit for single ended to differential conversion is disclosed. The circuit comprises a source for providing a single ended signal; and a transformer for receiving the single ended signal. The transformer includes first and second inductors. The first and second inductors are mutually coupled. When the operating frequency changes, a phase difference of currents flowing through the inductors changes, and therefore a phase difference between effective impedance of the first and second inductors changes to maintain a substantially 180 degree phase difference due to the mutual coupling.Type: ApplicationFiled: August 3, 2011Publication date: February 7, 2013Applicant: Ralink Technology CorporationInventor: Eric Chiyuan LU
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Patent number: 8369458Abstract: A circuit is disclosed that comprises a controller and an analog to digital converter (ADC) coupled to controller. The speed and/or the resolution of the ADC is configurable to provide optimum performance during the operation of the ADC. In an embodiment a wireless receiver with an adaptively configurable ADC for is provided. The speed and resolution the ADC is configurable depending on the operational mode of the receiver. Accordingly, through the use of an adaptively configurable ADC, power consumption and speed is optimized for each operational mode.Type: GrantFiled: December 20, 2007Date of Patent: February 5, 2013Assignee: Ralink Technology CorporationInventors: Louis Wong, Chungwen Dennis Lo
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Patent number: 8354965Abstract: A multiple antenna communication apparatus includes a printed circuit board having multiple layers and two antenna devices. The two antenna devices are disposed on antenna regions of the printed circuit board, and each antenna device comprises a ground terminal. Each ground terminal is coupled to a conductor on a different layer of the printed circuit board. The antenna regions on which the two antenna devices are disposed do not contain any main ground via.Type: GrantFiled: July 23, 2010Date of Patent: January 15, 2013Assignee: Ralink Technology CorporationInventors: Min Chung Wu, Shao Chin Lo
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Patent number: 8345583Abstract: A method for enhancing Ethernet channel impairment comprises the steps of sending a sequence to a receiver in a slave transceiver by a master transceiver, and training cancellation filter coefficients of an echo canceller and a near-end cross talk canceller in the master transceiver before the receiver of the slave transceiver converges.Type: GrantFiled: February 11, 2010Date of Patent: January 1, 2013Assignee: Ralink Technology CorporationInventors: Guan Henry Lin, Wen Sheng Hou, Kai Taing Yang
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Patent number: 8326905Abstract: A transversal filter circuit comprises a plurality of delay units, a plurality of multiplexers and a plurality of full adders. The plurality of delay units is coupled in series to delay a two-bit input signal. The plurality of multiplexers is coupled to the plurality of delay units in a one-to-one manner, and outputs zero, a data signal, or the inverse of the data signal according to the output signals of the plurality of delay units. The plurality of full adders accumulates the outputs of the plurality of multiplexers and the MSB of the outputs of the plurality of the delay units.Type: GrantFiled: May 22, 2009Date of Patent: December 4, 2012Assignee: Ralink Technology CorporationInventors: Shih-Yi Yeh, Ruei-Dar Fang
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Publication number: 20120281714Abstract: A packet processing accelerator comprises a programmable packet classification module, a programmable flow control module, and a programmable packet header modification module. The programmable packet classification module is configured to receive a data packet and generate a start location of each protocol header of the data packet and a first index. The first index indicates classification of the data packet. The programmable flow control module is configured to generate a code of an output port and an action code according to the start location of each protocol header of the data packet and the first index. The programmable packet header modification module is configured to modify content of a plurality of protocol headers of the data packet according to the action code and to send the modified data packet to an output port according to the code of the output port.Type: ApplicationFiled: September 8, 2011Publication date: November 8, 2012Applicant: RALINK TECHNOLOGY CORPORATIONInventors: Shang Pin Chang, Kuo Yen Fan, Chung Chi Lo, Shuenn Ren Liu