Patent application number | Description | Published |
20110050471 | Use of Three Phase Clock in Sigma Delta Modulator to Mitigate the Quantization Noise Folding - A differential sigma delta modulator operates by modulating an input signal by intermittently coupling a reference signal to the input signal using one or more switches controlled by one or more feedback signals and a respective one or more non-overlapping clock signals. The modulated input signal is integrated using an integration capacitor to form an integrated value and the integrated value is compared to a threshold to form the one or more feedback signals. Parasitic capacitance of the one or more switches is initialized to an initial value prior to each intermittent coupling of the reference signal to the input signal using another non-overlapping clock signal. | 03-03-2011 |
20110199137 | LOOP FILTER AND VOLTAGE CONTROLLED OSCILLATOR FOR A PHASE-LOCKED LOOP - A phase-locked loop includes a loop filter and a voltage controlled oscillator (VCO). The VCO includes multiple transistors, each transistor having a smaller transconductance (g | 08-18-2011 |
20110267133 | CURRENT GENERATING CIRCUIT - A current generating circuit including a current mirror, an impedance device, a first voltage generating portion and a second voltage generating portion. The current mirror has a current output leg and a current generating leg. The impedance device is connected to the current generating leg. The first voltage generating portion can generate a first voltage that is complementary to absolute temperature. The second voltage generating portion can generate a second voltage that is proportional to absolute temperature. The first voltage generating portion and the second voltage generating portion are arranged to generate an impedance current across the impedance device. The current output leg is operable to output an output current based on the impedance current. The impedance device has an impedance value, a first terminal and a second terminal. An impedance voltage drop across the first terminal and the second terminal is equal to a product of the impedance value and the impedance current. The first voltage is based on an attenuation of the impedance voltage drop. | 11-03-2011 |
20120086510 | COMMON-MODE FEEDBACK AMPLIFIER - A circuit is provided for use with a reference voltage. The circuit includes a voltage source, a common-mode feedback amplifier and a feedback impedance portion. The common-mode feedback amplifier may be connected to the voltage source and may be arranged to receive the reference voltage. The common-mode feedback amplifier may include an input stage, an output stage, a positive input, a negative input and an output. The output may be connected to the feedback impedance portion. The feedback impedance portion may additionally be connected to one of the positive input and the negative input. A feedback factor, based on the feedback impedance portion, is less than one. | 04-12-2012 |
20120092050 | OSCILLATOR CIRCUIT AND METHOD FOR GAIN AND PHASE NOISE CONTROL - An oscillator circuit and method for gain and phase noise control. A gain and phase noise controlled oscillator circuit includes a variable electronic oscillator and a tuning loop circuit. In operation, the variable electronic oscillator generates a clock signal and has a clock signal frequency that is controlled by a sense voltage received by the variable electronic oscillator or by one or more capacitive loads coupled to the variable electronic oscillator. Further, the tuning loop circuit is coupled to the variable electronic oscillator and compares the sense voltage to a control voltage received by the tuning loop circuit and produces one or more correction signals based on the comparison, where the one or more capacitive loads change capacitance based on the one or more correction signals. | 04-19-2012 |
20120306678 | Three-level digital-to-analog converter - A system for processing a signal includes a detector configured to detect a two-level stream of bits; a converter configured to generate a three-level control signal based on two adjacent values within the two-level stream of bits; and a switch configured to determine which of three different paths to couple a current source to based on a value of the three-level control signal. Thus, based on adjacent values of the output stream a three-level control signal is generated which controls coupling of the current source to one of three different paths. This type of three-level digital-to-analog converter can be, for example, part of the feedback loop of an analog-to-digital converter. Similar techniques can also be utilized in a multi-segment digital-to-analog converter in which each segment of the DAC is controlled by a 3-level control signal and the DAC is implement using PMOS devices. The current source for each DAC segment is diverted to ground, the M-node, or the P-node depending on the value of the 3-level control signal. | 12-06-2012 |
20120319734 | SYSTEM AND METHOD FOR REDUCING POWER CONSUMPTION IN A PHASED-LOCKED LOOP CIRCUIT - A phased-locked loop (PLL) circuit which comprises a phase-frequency detector (PFD) configured to receive a reference signal, a voltage-controlled oscillator (VCO) configured to produce a VCO signal, and a divider configured to divide the VCO signal thereby producing a feedback signal based on the feedback signal not being locked to the reference signal. Based on the feedback signal not being locked to the reference signal, the PFD is configured to compare an edge of the reference signal with an edge of the feedback signal to produce an error signal. Based on the feedback signal being locked to the reference signal, the PFD is configured to compare the edge of the reference signal to an edge of the VCO signal to produce an error signal and the divider is configured to be disabled. | 12-20-2012 |
20120319786 | AUTOCONFIGURABLE PHASE-LOCKED LOOP WHICH AUTOMATICALLY MAINTAINS A CONSTANT DAMPING FACTOR AND ADJUSTS THE LOOP BANDWIDTH TO A CONSTANT RATIO OF THE REFERENCE FREQUENCY - A phase-locked loop (PLL) includes a state machine programmed to automatically produce a set of control signals to select a charge-pump current and integrating capacitance value to automatically adjust a loop bandwidth of the PLL. A charge-pump DAC generates a charge-pump current of magnitude controlled by the state machine control signals. An integrator integrates the charge-pump output current to produce an integrated charge-pump output signal. The integrator has a plurality of capacitors switchably selected by control signals from the state machine to produce an integrating capacitance value. A voltage controlled oscillator (VCO) produces a PLL output frequency in response to the integrated charge-pump output signal. | 12-20-2012 |
20130241504 | SELF-CALIBRATING, STABLE LDO REGULATOR - A substantially unconditionally stable LOD regulator includes has first and second current paths. The first current path provides a reference current. The second current path receives an input voltage for developing a differential current with respect to the reference current based on the input voltage. The second current path has a sense resistor for sensing the differential current. A first current source biases the first and second current paths. A third current path senses the differential current and develops the input voltage in response thereto to control the differential current. A second current source biases the second current path. A first voltage follower circuit receives a first voltage on a first side of the sense resistor to provide an analog voltage output, and a second voltage follower circuit receives a second voltage on a second side of the sense resistor to provide a digital voltage output. | 09-19-2013 |
20140035768 | ANALOG-TO-DIGTAL CONVERTER - An analog-to-digital converter (ADC) comprises a plurality of time-interleaved integrating ADCs having feedback from an integrated output signal. In variations, the time-interleaved integrating ADCs have feedback compensation from at least one measure of quantization error. The time-interleaved integrating ADCs may also share a single comparator and may also share a single current source. | 02-06-2014 |
Patent application number | Description | Published |
20100057005 | INJECTION SYSTEMS - An intraosseous injection device includes a tool having a distal portion, a proximal portion, and a solution dispensing opening. The distal portion has one or more cutting surfaces. The tool can be coupled with a protective carrier. The tool can be rotatably coupled to a tool actuation mechanism. A housing has a distal end and a proximal end. The housing releasably receives a solution cartridge containing a solution. A solution dispensing mechanism dispenses solution from the solution cartridge. A gripping member grips a proximal portion of the tool. A rotation device rotates the gripping member and thereby rotates the tool about an axis. The proximal portion of the tool connects directly to the solution cartridge such that solution from the cartridge can be delivered through the solution dispensing opening. The tool is configured to rotate relative to the solution cartridge. | 03-04-2010 |
20100102517 | SEALING SYSTEM FOR MEDICAL/DENTAL HANDPIECES - A system for enhanced sealing against intrusion of moisture and other contaminants for medical/dental handpieces having rotating or other moving elements driven by a motor within the handpiece. The enhanced sealing includes tandem seals on stepped diameters to provide additional flow pathway impediments. The tandem seals preferably include spring seals that are positioned in opposite directions to provide enhanced sealing against pressures in two different directions that occur during the pressurization and vacuum cycles of an autoclaving process. Additional enhancements include the use of annular sealing rings with x-shaped cross sections. | 04-29-2010 |
20140284918 | Coupling Nut Assembly - A coupling assembly for coupling annular fittings includes first and second coupling elements. The first coupling element defines interior and exterior opposite surfaces, and first and second end opposite portions. The first coupling element includes a plurality of flexible tabs slantedly protruding from the exterior surface; and also includes threads configured along the interior surface at the first end portion. The second end portion is non-threaded. The second coupling element defines inner and outer opposite surfaces. The second coupling element includes a plurality of rigid tabs vertically protruding from the inner surface. The second coupling element coaxially engages the first coupling element such that the flexible tabs and rigid tabs interact with each other to tighten and loosen the coupling assembly against the annular fittings via torque application. While tightening, the non-threaded second end portion and the flexible tabs and rigid tabs combination preclude over-tightening. | 09-25-2014 |
20150201918 | Surgical Handpiece - Embodiments of the present invention provide a unique surgical handpiece having improved operation, durability and reliability. In one embodiment, the present invention provides a motorized handheld surgical instrument having one or more sensors for sensing motion, position, pressure, humidity, and various other environmental conditions relevant to the operation and maintenance of the surgical instrument. | 07-23-2015 |
Patent application number | Description | Published |
20080240514 | Method of personal recognition using hand-shape and texture - The present invention relates to a method and system for a multimodal biometric system utilizing a single image to generate hand shape and palmprint features. The invention utilizes a digital camera, and incorporates feature subset selection algorithms to eliminate redundant data. The inventions, through the use of feature algorithm, successfully fuses the hand shape features and palmprint features at the features level. | 10-02-2008 |
20110304720 | METHOD AND APPARATUS FOR PERSONAL IDENTIFICATION USING FINGER IMAGING - A system for extracting finger vein and finger texture images from a finger of a person at the same time, the device including an image capture device configured to capture at least one image of at least one finger in a contactless manner, a feature extraction module configured to extract unique finger vein features and finger texture features from the at least one captured image, and a processing module configured to normalize the at least one captured image and integrate the extracted finger vein features and finger texture features. | 12-15-2011 |
20140044322 | Contactless 3D Biometric Feature identification System and Method thereof - The present invention discloses a contactless 3D biometric feature identification system and the method thereof. The system comprises of a fixed-viewpoint image capturing means, a lighting module capable of producing different illuminations on the object of interest and a microprocessor configured to execute a biometric identification algorithm. The algorithm starts with capturing a plurality of images with different illuminations. The captured images are then utilized to reconstruct a three dimensional surface model. Different features, for instance 2D and 3D coordinates and orientations of the biometric feature, surface curvature of the object and the local surface orientation of the object, are extracted from the captured images and the reconstructed 3D surface model. Different matching scores are also developed based on the aforesaid features to establish the identity of the biometric features. | 02-13-2014 |
20150110367 | Method of 3D Biometrics Identification - A method of 3D biometrics identification includes the steps of acquiring 3D image(s) of fingerprint; performing image normalization and feature extraction steps involving, noise elimination, ridge extraction, ridge modification and ridge validation; extracting 3D fingerprint minutiae and performing the reliability evaluation of the extracted 3D fingerprint minutiae; automatically extracting of 3D fingerprint template comprising at least five features; and automatically registering two 3D fingerprint templates, say P and Q, by computing relative 3D minutiae representation from a 3D minutiae in P (sample) considered as the origin and aligning every 3D minutiae in Q to compute best possible matching score, wherein every 3D minutiae in template P is further considered as the origin for the alignment of 3D minutiae in template Q, and the best possible matching score obtained from such considerations (candidate alignments) is considered as the final matching score between two 3D fingerprint templates. | 04-23-2015 |
Patent application number | Description | Published |
20130152077 | PERSONAL AND POOLED VIRTUAL MACHINE UPDATE - The updating of virtual machines. A task broker schedules update tasks for multiple virtual machines on the host machine. As each update task is to be performed, if the virtual machine is not currently running, as might be the case for a personal virtual machine, the virtual machine is caused to begin running to allow the update task to be performed on the virtual machine. Also, a pooled virtual machine is updated by copying information from the old virtual hard drive to a location to allow the information to be preserved as the master image is updated. After the update is completed, the virtual machine is formed, associated with the new virtual hard drive, and copied back to the virtual machine. | 06-13-2013 |
20140289718 | PERSONAL AND POOLED VIRTUAL MACHINE UPDATE - The updating of virtual machines. A task broker schedules update tasks for multiple virtual machines on the host machine. As each update task is to be performed, if the virtual machine is not currently running, as might be the case for a personal virtual machine, the virtual machine is caused to begin running to allow the update task to be performed on the virtual machine. Also, a pooled virtual machine is updated by copying information from the old virtual hard drive to a location to allow the information to be preserved as the master image is updated. After the update is completed, the virtual machine is formed, associated with the new virtual hard drive, and copied back to the virtual machine. | 09-25-2014 |