Patent application number | Description | Published |
20100235578 | Cached Memory System and Cache Controller for Embedded Digital Signal Processor - A cached memory system that can handle high-rate input data and ensure that an embedded DSP can meet real-time constraints is described. The cached memory system includes a cache memory located close to a processor core, an on-chip memory at the next higher memory level, and an external main memory at the topmost memory level. A cache controller handles paging of instructions and data between the cache memory and the on-chip memory for cache misses. A direct memory exchange (DME) controller handles user-controlled paging between the on-chip memory and the external memory. A user/programmer can arrange to have the instructions and data required by the processor core to be present in the on-chip memory well in advance of when they are actually needed by the processor core. | 09-16-2010 |
20110105070 | Direct conversion receiver architecture - A direct downconversion receiver architecture having a DC loop to remove DC offset from the signal components, a digital variable gain amplifier (DVGA) to provide a range of gains, an automatic gain control (AGC) loop to provide gain control for the DVGA and RF/analog circuitry, and a serial bus interface (SBI) unit to provide controls for the RF/analog circuitry via a serial bus. The DVGA may be advantageously designed and located as described herein. The operating mode of the VGA loop may be selected based on the operating mode of the DC loop, since these two loops interact with one another. The duration of time the DC loop is operated in an acquisition mode may be selected to be inversely proportional to the DC loop bandwidth in the acquisition mode. The controls for some or all of the RF/analog circuitry may be provided via the serial bus. | 05-05-2011 |
20110170611 | VIDEO ENCODING AND DECODING TECHNIQUES - This disclosure describes video encoding techniques capable of reducing the number of processing cycles and memory transfers necessary to encode a video sequence. In this manner, the disclosed video encoding techniques may increase video encoding speed and reduce power consumption. In general, the video encoding techniques make use of a candidate memory that stores video blocks in columns corresponding to a search space for a motion estimation routine. A memory control unit addresses the candidate memory to retrieve multiple pixels in parallel for simultaneous comparison to pixels in a video block to be encoded, e.g., using Sum of Absolute Difference (SAD) or Sum of Squared Difference (SSD) techniques. A difference processor performs the parallel calculations. In addition, for subsequent video blocks to be encoded, the candidate memory can be incrementally updated by loading a new column of video blocks, rather than reloading the entire search space. | 07-14-2011 |
Patent application number | Description | Published |
20080208271 | High Frequency Stimulation for Treatment of Atrial Fibrillation - The invention relates to methods and devices for treating and/or preventing atrial fibrillation. In an embodiment, the invention includes a method of treating and/or preventing atrial fibrillation including applying an oscillating electrical stimulus to a tissue of a patient, the oscillating electrical stimulus sufficient to block transmission of electrical signals through the tissue. In an embodiment, the invention includes an implantable medical device including a stimulator configured to generate an oscillating electrical stimulus at a frequency and amplitude sufficient to block transmission of electrical signals through a tissue, a stimulation electrode in communication with the stimulator, the stimulation electrode configured to deliver the oscillating electrical stimulus to the tissue, and control circuitry in communication with the stimulator, the control circuitry configured to selectively deliver the oscillating electrical stimulus to treat and/or prevent atrial fibrillation. Other embodiments are also described herein. | 08-28-2008 |
20100168735 | SYSTEM AND METHOD FOR ASSESSING COUPLING BETWEEN AN ELECTRODE AND TISSUE - A system and method for assessing a degree of coupling between an electrode and tissue in a body is provided. Values for first and second components of a complex impedance (e.g., resistance and reactance or impedance magnitude and phase angle) between the electrode and the tissue are obtained. These values are used together with a standardization value indicative of a deviation from a reference standard by a parameter associated with at least one of the body, the electrode and another component of the system to calculate a coupling index that is indicative of a degree of coupling between the electrode and the tissue. The coupling index may be displayed to a clinician in a variety of ways to indicate the degree of coupling to the clinician. The system and method find particular application in ablation of tissue by permitting a clinician to create lesions in the tissue more effectively and safely. | 07-01-2010 |
20130338725 | CARDIAC RESPONSE CLASSIFICATION USING MULTISITE SENSING AND PACING - Methods and devices for classifying a cardiac pacing response involve using a first electrode combination for pacing and a second electrode combination for sensing a cardiac signal following pacing. The cardiac response to pacing may be classified using the sensed cardiac signal. One process involves using the sensed cardiac signal to detect the cardiac response as a fusion/pseudofusion beat. Another process involves using the sensed cardiac signal to classify the cardiac response to pacing as one of at least three cardiac response types. | 12-19-2013 |
20150051662 | CARDIAC RESPONSE CLASSIFICATION USING MULTISITE SENSING AND PACING - Methods and devices for classifying a cardiac pacing response involve using a first electrode combination for pacing and a second electrode combination for sensing a cardiac signal following pacing. The cardiac response to pacing may be classified using the sensed cardiac signal. One process involves using the sensed cardiac signal to detect the cardiac response as a fusion/pseudofusion beat. Another process involves using the sensed cardiac signal to classify the cardiac response to pacing as one of at least three cardiac response types. | 02-19-2015 |
Patent application number | Description | Published |
20080281305 | METHOD AND APPARATUS FOR RELIEVING ANGINA SYMPTOMS USING LIGHT - An implantable medical device includes a light emitting circuit incorporated into an intravascular stent. The light emitting circuit emits a light to an ischemic region. The light has characteristics suitable for reliving the angina symptoms associated with ischemia. | 11-13-2008 |
20090054943 | Methods and apparatus to treat and prevent atrial tachyarrhythmias - The invention provides a cardiac rhythm management system which includes a tachyarrhythmia detection and classification circuit programmed to detect and classify a tachyarrhythmia, a biologic therapy delivery device configured to deliver or regulate an expression cassette suitable for terminating or preventing atrial fibrillation (AF), and a control circuit coupled to the tachyarrhythmia detection and classification circuit and the biologic therapy delivery device. Also provided is an implantable medical device for use in a body having a cardiovascular system, which includes an implantable device body including at least a cardiovascular portion configured to be in the cardiovascular system, and an expression cassette incorporated into the cardiovascular portion of the implantable device body, the expression cassette selected to express a gene product that terminates or prevents AF. Further provided are methods which employ particular expression cassettes to prevent, inhibit or treat AF. | 02-26-2009 |
20110077701 | METHOD AND APPARATUS FOR TISSUE PROTECTION AGAINST ISCHEMIA USING REMOTE CONDITIONING - A stimulation system delivers stimulation to protect an ischemic region of a body from tissue damage caused by ischemia. The stimulation is delivered to one or more stimulation sites remote from the ischemic region to elicit a physiological effect that protects the ischemic region from the tissue damage caused by ischemia. In one embodiment, the stimulation system delivers cardioprotective stimulation to one or more stimulation sites remote from the heart to protect the heart from injuries associated with cardiac ischemic events. In another embodiment, the stimulation system delivers remote conditioning stimulation to one or more stimulation sites in or on the heart to protect a non-cardiac region from injuries associated with non-cardiac ischemic events. | 03-31-2011 |
20110137385 | METHOD AND APPARATUS FOR RELIEVING ANGINA SYMPTOMS USING LIGHT - An implantable medical device includes a light emitting circuit incorporated into an intravascular stent. The light emitting circuit emits a light to an ischemic region. The light has characteristics suitable for reliving the angina symptoms associated with ischemia. | 06-09-2011 |
20120109278 | NEUROTOXIC AGENTS AND MEDICAL DEVICES THEREFOR - Devices and methods to treat atrial fibrillation via inhibition of nerves which innervate the pulmonary vein are provided. | 05-03-2012 |
20140107430 | System and method for assessing coupling between an electrode and tissue - A system and method for assessing a degree of coupling between an electrode and tissue in a body is provided. Values for first and second components of a complex impedance (e.g., resistance and reactance or impedance magnitude and phase angle) between the electrode and the tissue are obtained. These values are used together with a standardization value indicative of a deviation from a reference standard by a parameter associated with at least one of the body, the electrode and another component of the system to calculate a coupling index that is indicative of a degree of coupling between the electrode and the tissue. The coupling index may be displayed to a clinician in a variety of ways to indicate the degree of coupling to the clinician. The system and method find particular application in ablation of tissue by permitting a clinician to create lesions in the tissue more effectively and safely. | 04-17-2014 |