| Patent Number |
Title Of Patent |
Date Issued |
| D578114 |
Radio frequency indentification tag antenna assembly |
October 7, 2008 |
|
| D574370 |
Broken-loop RFID reader antenna for near field and far field UHF RFID tags |
August 5, 2008 |
|
| D574369 |
Broken-loop RFID reader antenna for near field and far field UHF RFID tags |
August 5, 2008 |
|
| D570337 |
Broken-loop RFID reader antenna for near field and far field UHF RFID tags |
June 3, 2008 |
|
| D563397 |
Radio frequency identification tag antenna assembly |
March 4, 2008 |
|
| D562810 |
Radio frequency identification tag antenna assembly |
February 26, 2008 |
|
| D548225 |
Radio frequency identification tag antenna assembly |
August 7, 2007 |
|
| D547754 |
Radio frequency identification tag antenna assembly |
July 31, 2007 |
|
| D547306 |
RFID antenna |
July 24, 2007 |
|
| D546822 |
Radio frequency identification tag antenna assembly |
July 17, 2007 |
|
| D546821 |
Radio frequency identification tag antenna assembly |
July 17, 2007 |
|
| D546820 |
Radio frequency identification tag antenna assembly |
July 17, 2007 |
|
| D546819 |
Radio frequency identification tag antenna assembly |
July 17, 2007 |
|
| D543976 |
RFID antenna |
June 5, 2007 |
|
| 7472835 |
RFID system components implementing adjusted backscatter calculations and methods |
January 6, 2009 |
| RFID system components, such as readers and tags, communicate by a reader transmitting waveforms that encode a calibration symbol and a divide ratio. Tags include a processor to determine a backscatter link period result by dividing a count value representing the calibration symbol by |
| 7448547 |
Decoding with memory in RFID system |
November 11, 2008 |
| RFID readers, RFID tags, software, and methods decode a signal received in an RFID system. From received data, a decoder determines a number of possible test series for the output. In one embodiment, the decoder uses a memory of a previous sample to derive a subsequent sample in the test |
| 7436308 |
Adjusting RFID waveform shape in view of signal from another reader |
October 14, 2008 |
| Systems, software, devices, and methods are described for an RFID reader system to communicate with RFID tags. RF energy encountered in conjunction with using a selected channel is detected. The RF energy can be a signal from another RFID reader. The detected signal is used to adjust |
| 7432814 |
Reconstructing RFID waveform shape for reuse in individual channel |
October 7, 2008 |
| Systems, software, devices, and methods are described for an RFID reader system to communicate with RFID tags. RF energy detected in conjunction with using a selected channel is detected and used to adjust a waveform shaping parameter. The waveform shaping parameter can be additionally |
| 7423539 |
RFID tags combining signals received from multiple RF ports |
September 9, 2008 |
| Circuits, devices and methods for use in RFID tags include receiving multiple RF signals from multiple ports. The signals are added after some processing, to produce a single combined signal. Additional components process the single combined signal by itself. |
| 7420469 |
RFID tag circuits using ring FET |
September 2, 2008 |
| A Radio Frequency IDentification (RFID) circuit for use in an RFID tag includes a FET semiconductor device that is coupled to antenna connections. The device can be part of a modulator, a demodulator, or a rectifier. A designated region for a first terminal (such as a drain or a sour |
| 7419096 |
RFID joint acquisition of time sync and timebase |
September 2, 2008 |
| Systems and methods to determine timebase and timing (i.e., time sync) of received signals in RFID systems. Multiple matched filters corresponding to multiple timebases are used to receive the preambles of signals received from RFID tags. The multiple matched filters define a range of |
| 7417548 |
Adjusting RFID waveform shape in view of signal from an RFID tag |
August 26, 2008 |
| Systems, software, devices, and methods are described for an RFID reader system to communicate with RFID tags. RF energy encountered in conjunction with using a selected channel is detected. The RF energy can be a signal from an RFID tag. The detected signal is used to adjust a wavef |
| 7408809 |
Method and apparatus for programming single-poly pFET-based nonvolatile memory cells |
August 5, 2008 |
| Methods and apparatuses for programming a single-poly pFET-based nonvolatile memory cell bias the cell so that band-to-band tunneling (BTBT) is induced and electrons generated by the BTBT are injected onto a floating gate of the cell. Following a predetermined event, the single-poly |
| 7408466 |
Adjusting RFID waveform shape in view of detected RF energy |
August 5, 2008 |
| Systems, software, devices, and methods are described for an RFID reader system to communicate with RFID tags. RF energy encountered in conjunction with using a selected channel is detected and used to adjust a waveform shaping parameter. RF waves can be transmitted from the reader t |
| 7405660 |
Error recovery in RFID reader systems |
July 29, 2008 |
| RFID systems, devices, software and methods are adapted for receiving from an RFID tag at least waves that communicate at least a first version of its code. An output tag code is output that is the same as the first version, if a fidelity criterion is met regarding the first version. If |
| 7405659 |
RFID tag switched capacitor slicer threshold |
July 29, 2008 |
| An RFID tag that receives an RF signal from a reader is arranged to derive a threshold signal from a detected envelope of the RF signal, where the threshold signal is proportional to the detected envelope signal. The detected envelope signal is then compared to the threshold signal to |
| 7403122 |
RFID tag circuits operable at different speeds |
July 22, 2008 |
| Embodiments of RFID tag circuits and methods are described, which include a chip having a clock circuit operable to generate a clock signal having different frequencies, and one or more components operable to work at the different frequencies. In addition to a regular frequency, at least |
| 7400255 |
Wireless functional testing of RFID tag |
July 15, 2008 |
| Wirelessly testing an RFID tag before it is packaged or otherwise entered into a process reserved for "working" RFID tags is described. Various processes that employ such wireless testing as well as various "on-die" RFID tag antenna designs for facilitating the wireless testing are also |
| 7394324 |
Method and system to calibrate an oscillator within an RFID circuit utilizing a test signal supp |
July 1, 2008 |
| In accordance with one aspect of the present invention, there is provided a method of calibrating an oscillator within a radio-frequency identification (RFID) circuit for use in an RFID tag. The oscillator has an oscillation frequency. A calibration value is stored within a non-volat |
| 7391329 |
Performance driven adjustment of RFID waveform shape |
June 24, 2008 |
| Systems, software, devices, and methods are described for an RFID reader system to communicate with RFID tags. RF energy encountered in conjunction with using a selected channel is detected and used to adjust a waveform shaping parameter in combination with a performance requirement. |
| 7389101 |
Use of analog-valued floating-gate transistors for parallel and serial signal processing |
June 17, 2008 |
| Analog-valued floating-gate transistors are used as trimmable circuit components for modifying and/or controlling the gain, phase, offset, frequency response, current consumption, and/or transfer function of signal pathways in parallel and/or serial processing circuits in radio frequ |
| 7388468 |
Method and system to backscatter modulate a radio-frequency signal from an RFID tag in accordanc |
June 17, 2008 |
| According to one aspect of the present invention, there is provided a method to backscatter modulate a first radio-frequency (RF) signal from a radio-frequency identification (RFID) tag. An oscillator calibration value is retrieved from a non-volatile memory associated with the RFID |
| 7388420 |
Rewriteable electronic fuses |
June 17, 2008 |
| Rewriteable electronic fuses include latches and/or logic gates coupled to one or more nonvolatile memory elements. The nonvolatile memory elements are configured to be programmed to memory values capable of causing associated electronic circuits to settle to predetermined states as |
| 7382257 |
Single RF oscillator single-side band modulation for RFID readers with frequency translation and |
June 3, 2008 |
| A transmitter shifts a baseband data signal having a bandwidth of 2.omega..sub.M using a tone signal having a frequency .omega..sub.M, which centers a sideband of the data signal at zero frequency. The transmitter then filters the shifted signal to filter out the non-centered sideban |
| 7380190 |
RFID tag with bist circuits |
May 27, 2008 |
| Technologies suitable for on-wafer testing in the ubiquitous computing era are disclosed. Among the inventive features disclosed are: 1) clustering of wafer test probe landing area sites for parallel test sequencing; 2) on wafer test wiring that runs along the wafer's scribe regions; 3) |
| 7375398 |
High voltage FET gate structure |
May 20, 2008 |
| A FET device for operation at high voltages includes a substrate, a first well and a second well within the substrate that are doped with implants of a first type and second type, respectively. The first and second wells define a p-n junction. A field oxide layer within the second well d |
| 7315067 |
Native high-voltage n-channel LDMOSFET in standard logic CMOS |
January 1, 2008 |
| A native high-voltage n-channel LDMOSFET includes a p- doped substrate, a first n+ doped region disposed in the p- doped substrate, a source terminal coupled to the first n+ doped region, an n- well disposed in the substrate, a second n+ doped region disposed in the n- well, a drain |
| 7312622 |
Wafer level testing for RFID tags |
December 25, 2007 |
| Technologies suitable for on-wafer testing in the ubiquitous computing era are disclosed. Among the inventive features disclosed are: 1) clustering of wafer test probe landing area sites for parallel test sequencing; 2) on wafer test wiring that runs along the wafer's scribe regions; 3) |
| 7307534 |
RFID tag using hybrid non-volatile memory |
December 11, 2007 |
| An RFID tag includes a non-volatile memory (NVM) circuit with at least two distinct types of NVM sub-circuits that share common support circuitry. Different types of NVM sub-circuits include ordinary NVM circuits that provide a logic output upon being addressed, programmable fuses that |
| 7307529 |
RFID tags with electronic fuses for storing component configuration data |
December 11, 2007 |
| An RFID tag has a fuse that is adapted to store configuration data in a way that survives loss of power. The fuse can be one time programmable or many times programmable, and be implemented with a non-volatile memory. The configuration data becomes available to an operational component o |
| 7307528 |
RFID tag design with circuitry for wafer level testing |
December 11, 2007 |
| Technologies suitable for on-wafer testing in the ubiquitous computing era are disclosed. Among the inventive features disclosed are: 1) clustering of wafer test probe landing area sites for parallel test sequencing; 2) on wafer test wiring that runs along the wafer's scribe regions; 3) |
| 7304579 |
RFID reader to select code modules |
December 4, 2007 |
| RFID reader systems, chips, and methods deal with the occasional problem of environmental noise, such as interference from other RFID readers. An RF carrier at a center frequency is modulated, for causing an antenna to transmit a wireless signal to an RFID tag. One of a first and a secon |
| 7289358 |
MTP NVM elements by-passed for programming |
October 30, 2007 |
| Non-Volatile Memory (NVM) cells include a selection circuit for providing an output based on selecting between an input data signal and an output of a Multiple Time Programmable (MTP) NVM element. The input data signal may be latched by a latch circuit such as a flip-flop first. The sele |
| 7283390 |
Hybrid non-volatile memory |
October 16, 2007 |
| A non-volatile memory (NVM) circuit includes at least two types of NVM sub-circuits that share common support circuitry. Different types of NVM sub-circuits include ordinary NVM circuits that provide a logic output upon being addressed, programmable fuses that provide an output upon |
| 7283037 |
RFID tags adjusting to different regulatory environments, and RFID readers to so adjust them and |
October 16, 2007 |
| An RFID tag has an antenna to receive a configuration signal, and a circuit with a controller that can configure the RFID circuit responsive to the configuration signal. Configuring is such that the tag backscatters by impressing data either on the carrier frequency, or on a subcarri |
| 7263001 |
Compact non-volatile memory cell and array system |
August 28, 2007 |
| NVM arrays include rows and columns of NVM cells comprising a floating gate, a programming element, and a logic storage element. During a programming or erase mode, the floating gate of each cell is charged to a predetermined level. At the beginning of a read mode, all storage elemen |
| 7262092 |
High-voltage CMOS-compatible capacitors |
August 28, 2007 |
| A high-voltage stacked capacitor includes a first capacitor and a second capacitor. Each capacitor includes a first plate having a first semiconductive body and a second plate having a floating electrode. The first and second semiconductive bodies are electrically isolated from each |
| 7257033 |
Inverter non-volatile memory cell and array system |
August 14, 2007 |
| NVM arrays include rows and columns of NVM cells comprising a floating gate, dual transistor, inverter storage element. Supply voltage for selected storage elements is turned off during a programming and an erase mode. Isolation transistors for each NVM cell or for each row of NVM ce |
| 7253719 |
Multi-oscillator clock signals |
August 7, 2007 |
| Methods and apparatus may operate to use multiple oscillators to generate a demodulator clock signal and a modulator clock signal within a radio-frequency identification (RFID) circuit. The demodulator clock signal may be generated from a radio-frequency signal received at the RFID c |
| 7246751 |
RFID tags calibrating backscattering period also for non-integer divide ratios |
July 24, 2007 |
| An RFID tag that receives a calibration instruction from a reader can determine the basic backscatter period of the symbols to be backscattered. According to some embodiments, when the instruction includes a calibration feature that is to be divided by a divide ratio, the tag measure |
