| RALINK TECHNOLOGY (SINGAPORE) CORPORATION Patent applications |
| Patent application number | Title | Published |
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| 20110143690 | METHOD AND SYSTEM FOR INTEGRATING TRANSMIT SWITCH FUNCTIONALITY IN A WLAN RADIO TRANSCEIVER - A radio transceiver is disclosed. The transceiver comprises an integrated circuit. The integrated circuit comprises a transmit path; a first switch coupled in series with the output of the transmit path; a receive path; and a second switch coupled as a shunt with the input of the receive path. The transceiver further comprises a plurality of external matching networks coupled to the transmit and receive paths of the integrated circuit to ensure minimal loading from one path to the other. The transceiver also comprises a shared balun for converting differential signals from the plurality of external matching networks to single ended signals; and an antenna to interface with the single ended signals. A method and system in accordance with an embodiment enables tying together the transmit path and the receive paths of a radio transceiver without the need for an external T/R switch. A method and system in accordance with an embodiment minimizes the loading effects between the transmit path and the receive path such that output power and NF noise figure are not degraded after tying the transmit path and the receive path together. | 06-16-2011 |
| 20110122857 | AUTONOMOUS WIRELESS COMMUNICATION SYSTEM AND METHOD OF USE - An autonomous wireless system is disclosed. The system comprises a plurality of devices. Each of the plurality of devices includes a wireless interface. At least two devices directly communicate with each other through a direct link between the wireless interfaces of the at least two devices. Methods and apparatus for two or more devices equipped with wireless local area network (WLAN) interface to communicate and exchange selected information are disclosed. Accordingly, a system and method in accordance with the present invention enables a handheld, laptop, smart phone or the like, which is equipped with a WLAN interface, to communicate and exchange business contact, sales brochures, event announcements, presentation materials, alert messages, etc., to other devices that include a WLAN interface. | 05-26-2011 |
| 20110122856 | AUTONOMOUS WIRELESS COMMUNICATION SYSTEM AND METHOD OF USE - An autonomous wireless system is disclosed. The system comprises a plurality of devices. Each of the plurality of devices includes a wireless interface. At least two devices directly communicate with each other through a direct link between the wireless interfaces of the at least two devices. Methods and apparatus for two or more devices equipped with wireless local area network (WLAN) interface to communicate and exchange selected information are disclosed. Accordingly, a system and method in accordance with the present invention enables a handheld, laptop, smart phone or the like, which is equipped with a WLAN interface, to communicate and exchange business contact, sales brochures, event announcements, presentation materials, alert messages, etc., to other devices that include a WLAN interface. | 05-26-2011 |
| 20110007848 | METHOD FOR CALIBRATING IQ MATCHING OF RECEIVER - A method and system for calibrating the mismatch between I data and Q data of a receiver is disclosed. The receiver includes an amplifier, first and second mixers coupled to the amplifier, an oscillator for driving the first and second mixers; and first and second filters coupled to the first and second mixers. The method comprises turning off the amplifier; and injecting a signal into the first and second mixers. The method also requires measuring the amplitude and phase information of the I and Q data from the first and second mixers based upon the injected signal to provide mismatch information and utilizing the mismatch information to compensate the I data and the Q data during normal operating mode. In a method and system in accordance with an embodiment, the IQ mismatch of a receiver can be measured and compensated. This allows direct-conversion architecture, which is known to have IQ mismatch problem, to be used. Furthermore, if this calibration method is applied to other receiver architectures, the yield loss due to IQ mismatch can be minimized. | 01-13-2011 |
| 20110006440 | SYSTEM AND METHOD TO REDUCE THE BONDWIRE/TRACE INDUCTANCE - A method and system for reducing the inductance on an integrated circuit. The method and system comprises providing a first differential line, including a first input and a first output, the first differential line including at least two bondwire traces which are coupled in parallel. The method and system also comprises providing a second differential line including a second input and a second output, the second differential line including at least two bondwire traces which are coupled in parallel, the first differential line being of opposite polarity to the second differential line. The method and system further comprises cross-coupling of the first input with the second input and the first output with the second output to reduce the inductance caused by bondwire traces. A technique in accordance with the invention uses the coupling factor K to help to further reduce the inductance. By changing the input ordering of differential bondwires/traces, the bondwire/trace magnetic coupling factor K can be used to reduce the line inductance. | 01-13-2011 |
| 20100316169 | METHOD AND SYSTEM FOR OPERATING A MIMO DECODER - Varying embodiments of the present invention provide a MIMO apparatus, such as a transceiver and a method of operation thereof. In an embodiment, the transceiver employs a parallelized., two-stage pipeline architecture that reduces the overall latency of the system. This reduction in latency translates to cost savings and higher data rates for the same hardware clock speed. | 12-16-2010 |
| 20100296554 | METHOD AND SYSTEM FOR DETECTING DATA FROM MULTIPLE ANTENNAS - Varying embodiments of the present invention provide a MIMO apparatus, such as a transceiver and a method of operation thereof. In an embodiment, the transceiver employs a parallelized, two-stage pipeline architecture that reduces the overall latency of the system. This reduction in latency translates to cost savings and higher data rates for the same hardware clock speed. | 11-25-2010 |
| 20100289541 | DIGITAL PHASE-LOCKED LOOP CIRCUIT INCLUDING A PHASE DELAY QUANTIZER AND METHOD OF USE - A phase locked loop circuit in accordance with an embodiment implements a digital phase delay quantizer to replace the analog charge-pump and phase frequency detector in an analog PLL circuit. Therefore, the built-in loop filter can be a compact-sized, high order, high bandwidth, and high attenuation digital filter as well. The digital PLL circuit takes advantage of the deep sub-micron process technology which features high speed, high resolution, compact size, and low power. | 11-18-2010 |
| 20100289539 | METHOD AND SYSTEM OF OPTIMIZING A CONTROL SYSTEM USING LOW VOLTAGE AND HIGH-SPEED SWITCHING - A phase-locked loop charge pump driven by low voltage input is disclosed. In one aspect, a charge pump for a phase-locked loop circuit includes a sourcing current source providing a sourcing current, wherein the sourcing current source is coupled to a high-voltage operating voltage supply. A sourcing control circuit uses low-voltage sourcing control signals to selectively cause the charge pump to source the sourcing current to an output of the charge pump. A sinking control circuit uses low-voltage sinking control signals at a low voltage and utilizes a low-swing current mechanism to sink the sinking current from the output of the charge pump. In another aspect, the sourcing control circuit is cascode and the sinking circuit is non-cascode. In another aspect the sourcing current source and the sinking current source are both cascode. In another aspect, the sourcing current source is non-cascode and the sinking current source is cascode. In another aspect, the sourcing current source and the sinking current source are both non-cascode. | 11-18-2010 |
| 20100248669 | DUAL-BAND TRANSCEIVER - A dual-band transceiver is disclosed. In one embodiment, the system includes a first mixer circuit that generates a first signal having a first frequency that is within a first predefined frequency range. The system also includes a second mixer circuit that generates a second signal having one of a second frequency that is within a second predefined frequency range and a third frequency that is within a third predefined frequency range, and wherein each of the first mixer circuit and the second mixer circuit are used for at least two frequency bands. | 09-30-2010 |
| 20100091670 | METHOD AND APPARATUS TO ALLOW COEIXTENCE BETWEEN WIRELESS DEVICES - The present invention relates generally to wireless transceivers, and more particularly but not exclusively to non 802.11 detection and avoidance methodologies for wireless devices including transceivers. In one or more implementations, a method for detecting non 802.11 operating in the unlicensed 5.25-5.35 and 5.47-10.725 GHz radio bands, using wireless devices, such as AP, are provided. An AP is used to automatically detect the presence of non 802.11 on all channels in these bands, alert all of its clients, and move to another channel that is known to be devoid of non 802.11 using one or more implementations. | 04-15-2010 |
