| CAMBRIDGE SILICON RADIO LTD. Patent applications |
| Patent application number | Title | Published |
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| 20110266626 | GATE DEPLETION DRAIN EXTENDED MOS TRANSISTOR - A drain extended MOS transistor configured to operate in a gate-depletion regime. Devices comprising such transistors are described together with fabrication processes for such devices and transistors. | 11-03-2011 |
| 20110241182 | DIE SEAL RING - An improved die seal ring is described which includes at least one break. In the region of the break in the die seal ring, the doping is modified so that the impedance of the electrical path across the break through the substrate is increased. Offsets in the break may also be used and the offset may be within a break in a track and/or between breaks in different tracks, where the die seal ring includes more than one track. | 10-06-2011 |
| 20110241126 | RF CMOS TRANSISTOR DESIGN - An improved RF CMOS transistor design is described. Local, narrow interconnect lines, which are located substantially above the active area of the transistor, are each connected to either a source terminal or a drain terminal. The source and the drain terminal are arranged orthogonally to the local interconnect lines and each terminal is significantly wider than a local interconnect line. In an example, the local interconnect lines are formed in a first metal layer and the source and drain terminals are formed in one or more subsequent metal layers. | 10-06-2011 |
| 20110235760 | EFFICIENT OFDM PEAK REDUCTION ALGORITHM - An efficient method of OFDM peak reduction is described. In an embodiment, a set of the most significant peaks in a symbol of an OFDM signal are identified and then, for each identified peak, a shifted and scaled version of a template cancellation signal is subtracted from the OFDM signal. The template cancellation signal is shifted such that its peak aligns with the identified peak and it is scaled such that it has the opposite phase to the identified peak. No iterative peak search and cancellation is involved in peak reduction, i.e. a cancellation step is not followed by another peak search for the same OFDM symbol. The process is repeated for each symbol in turn and in some embodiments the OFDM signal is up-sampled before it is analyzed to identify the most significant peaks. | 09-29-2011 |
| 20110205786 | MEMORY DESIGN - An improved memory design is described which removes the need to read firmware from ROM into RAM on start-up. A SRAM memory element comprises an influencing element which sets the state of the memory cells within the memory element on start-up to defined values. These defined values are set at the design stage such that on start-up the volatile memory contains firmware or other data. Dependent upon the implementation of the influencing element, the values of stored in the memory cells may be fixed or may subsequently be overwritten during operation of the device. In an example, the memory cell comprises two cross-coupled inverters and the influencing element comprises at least one transistor arranged to connect the input to one of the inverters to ground or a power supply rail when voltage is applied to a controlling node of the transistor. | 08-25-2011 |
| 20110199715 | IMPROVED METAL-ON-METAL CAPACITOR WITH DIAGONAL FEEDLINE - A design for an improved metal-on-metal capacitor design is described. The design includes a substantially diagonal feedline ( | 08-18-2011 |
| 20110198753 | IMPROVED WAFER LEVEL CHIP SCALE PACKAGING - An improved wafer level chip scale packaging technique is described which does not use an encapsulated via to connect between a redirection layer and a pad within the pad ring on the semiconductor die. In an embodiment, a first dielectric layer is formed such that it terminates on each die within the die's pad ring. Tracks are then formed in a conductive layer which contact one of the pads and run over the edge of an opening onto the surface of the first dielectric layer. These tracks may be used to form an electrical connection between the pad and a solder ball. | 08-18-2011 |
| 20110164710 | TRANSMISSION TIMING ADJUSTMENT IN RADIO SYSTEMS - A method of adjusting the transmission time of a signal in a radio link, the method being performed by a transmitter configured to transmit the signal over the radio link to a receiver and comprising the steps of ascertaining an accuracy that the receiver assumes for the transmitter's clock, calculating an assumed drift of the transmitter's clock based on the assumed accuracy of that clock and the time since a previous correlation between the transmitter's clock and the receiver's clock; and transmitting the signal at a time dependent on the assumed drift. | 07-07-2011 |
| 20110156157 | ONE-TIME PROGRAMMABLE CHARGE-TRAPPING NON-VOLATILE MEMORY DEVICE - A one-time programmable (OTP) charge-trapping non-volatile memory (NVM) device is described. In an embodiment, an OTP transistor is formed using a thick gate oxide typically used in producing an I/O MOS transistor and source/drain extensions which are highly doped, shallow and include pocket implants and which are typically used in producing a CORE thin-oxide MOS transistor. In an optimization, the OTP transistor may be formed with two narrow active areas instead of one wider active area. This provides increased performance compared to a device with a wider active area and reduced variability compared to a device with one narrow active area. In another embodiment, a dual gate oxide CMOS technology provides three types of transistor; a thin oxide device, a thick oxide device, and a thick oxide device using the implant type of the thin oxide device for providing an OTP charge-trapping NVM device. | 06-30-2011 |
| 20110078275 | SHARING OF ACCESS TO A STORAGE DEVICE - A method and system for sharing access to a storage device. Two processing devices are connected to a storage device interface. The processing devices are interconnected to allow communication with regard to access to the storage device interface. Access to the storage device interface is controlled by the first and second processing devices exchanging signals. Embodiments of the invention may be a mobile device configured to play audio files from a memory card connected to the mobile device. A communications link may be established to a remote device for the transfer of data between devices. | 03-31-2011 |
| 20110026512 | CO-EXISTENCE FOR CO-LOCATED RADIOS WHICH OPERATE IN THE SAME FREQUENCY BAND - A co-existence method is described. The method comprises setting a priority level of a slot based on the likelihood that the slot will be required by a first radio and signalling the priority level to radio which is co-located with the first radio and which shares a resource with the first radio. The slot may, for example, be a re-transmission slot following a primary transmission slot or may be a sniff anchor point. The likelihood may be determined based on one or more factors, such as historical data or knowledge of the activity of a peer of the first radio. | 02-03-2011 |
| 20110006434 | UNDER LAND ROUTING - An electronic component comprising an integrated device and a plurality of packaging layers in which routing between locations on the device and lands on the surface of the component is provided by a redistribution layer. The redistribution layer may be routed below the extent of a contact pad on the surface by providing a channel through the via and redistribution layers underneath that land. | 01-13-2011 |
| 20110004761 | VIRAL FILE TRANSFER - A method of distributing data between mobile devices while retaining control of that data. In particular, Digital Rights Management parameters are monitored and modified to control the distribution, and distribution is only permitted to devices which are approved or authorized. Mechanisms are provided for validating the identity of devices requesting transmission of the file. | 01-06-2011 |
| 20100308415 | ANALOGUE THIN-OXIDE MOSFET - A dual gate oxide CMOS technology providing three types of transistor; a thin oxide device, a thick oxide device, and a thin oxide device using the implant type of the thick oxide device for providing improved analogue performance. | 12-09-2010 |
| 20100277196 | SEMICONDUCTOR TEST SYSTEM AND METHOD - A method of testing semiconductor devices, the method includes the steps of making a first set of electrical connections to a first set of devices to allow a first set of tests to be performed on that set of devices and concurrently making a second set of electrical connections to a second set of devices to allow a second set of tests to be performed on the second set of devices, wherein the first and second sets of tests are different, and concurrently performing the first set of tests on the first set of devices and the second set of tests on the second set of devices. | 11-04-2010 |
| 20100105421 | POWER CONTROL METHOD - Improved power control methods and power control systems are described wherein received RSSI values are processed to generate a power control signal which may be used by a link manager, or other element in a receiving station, to determine whether to send a power control message to the transmitting station. The method used to process the received RSSI values is dependent upon a value of the power measurement, for example, the method may involve a comparison between the value of the power measurement and a value of the power control signal. In another embodiment, the received RSSI values may be converted to power values and then smoothed using a filter. | 04-29-2010 |
| 20100096730 | PASSIVATION TECHNIQUE - A method of semiconductor wafer fabrication. The wafer is fabricated by receiving a semiconductor wafer having a substrate layer and at least one processed layer, cutting a trench into the wafer, wherein the trench penetrates through the at least one processed layer and only partially through the thickness of the substrate layer, and depositing a passivation layer over the at least one processed layer such that the trench is filled with the passivation material. | 04-22-2010 |
| 20100078800 | LOW COST FLEXIBLE SUBSTRATE - A low cost flexible substrate is described which comprises a thin metal foil and a layer of solder mask. The metal foil layer is patterned to create tracks and lands for solder bonding and/or wirebonding and the layer of solder mask is patterned to create openings for solder bonding, wirebonding and/or for mounting the die. The substrate may be used as a package substrate to create a packaged die or may be used as a replacement for more expensive flexible printed circuit boards. | 04-01-2010 |
| 20100078772 | PACKAGING TECHNOLOGY - Metallised through silicon vias located in the scribe lanes between die are used to create an electrical connection between the front-side and the rear-side of a silicon die. One of the metallisation layers on the front-side of the die comprises portions which extend into the scribe lanes to form capture pads for the through silicon vias. The rear-side of the wafer is metallised and this metallisation may, in some embodiments, be patterned to form tracks or components. The silicon die may be used to create improved package on package devices. In other examples, other substrate materials may be used. | 04-01-2010 |
| 20100075606 | SELECTIVE TRANSCODING OF ENCODED MEDIA FILES - A method of mixing and transmitting encoded media data, wherein the data is decoded, mixed and recorded only when mixing with other data is required. When no mixing is required the encoded data is transmitted directly. In further methods, two sets of media data may be transmitted to an output device for mixing and outputting. | 03-25-2010 |
| 20100052141 | QFN PACKAGE - An improved Quad Flat No-Lead package is described. The package is formed by encapsulating a die mounted on a leadframe with a moulding compound using a mould chase. The mould chase comprises a number of internal projections which form openings in the mould compound to expose regions of the leadframe. These exposed regions of the leadframe may then be used for soldering the package to a substrate. The arrangement of the openings may be designed such that each aperture is the same shape and size and/or that the apertures are arranged in multiple rows on the underside of the package. | 03-04-2010 |
| 20090298530 | COEXISTENCE SYSTEM - A wireless communication system comprising a plurality of radio devices and an interconnect to facilitate sharing of resources between the plurality of radio devices. Each radio device is coupled to the interconnect such that each radio device can communicate to all of the other radio devices to facilitate sharing of resources and each radio device can ascertain the identity of a radio device sending a signal to the interconnect. The radio devices may be coupled to the interconnect by any suitable means, for example resistively or capacitively and the signals sent to the interconnect may be at baseband or at radio frequencies. Orthogonal code techniques may be utilized to allow the identification of each radio device. | 12-03-2009 |
| 20090201815 | FLOW CONTROL METHOD - Methods and apparatus for providing a flow control mechanism in a wireless network are described. In order to force a transmitting station to implement a rate adaptation mechanism, in which speed is traded off for reliability, a receiver within a receiving station behaves as if the radio conditions were degraded. This may be implemented when defined criteria are met, such as when the available buffer space falls below a threshold, and for some or all types of frames. In an embodiment, when the criteria are met, the receiver does not acknowledge frames received at one or more higher data rates. | 08-13-2009 |
