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Boas
Andre Luis Vilas Boas, Campinas BR
| Patent application number | Description | Published |
|---|---|---|
| 20080304348 | Current-mode memory cell - Methods and corresponding systems for reading a memory cell include a first current sourced from a first current source into a summing node, wherein the first current source is coupled to a first reference. A second current is sourced from a second current source into the summing node, wherein the second current source is coupled to the first reference through a programmable fuse. A third current is sunk from the summing node with a current sink, wherein the current sink is coupled to a second reference, and wherein a third current limit is greater than a first current limit and less than the sum of the first current limit and the second current limit. A voltage at the summing node is output in response to the first current, the second current, and the third current. The first and second current sources, and the current sink can be current mirrors. | 12-11-2008 |
| 20100127687 | Programmable Voltage Reference - A programmable voltage reference includes a temperature compensated current source and a voltage reference circuit. The temperature compensated current source includes an output configured to provide a reference current. The voltage reference circuit includes an input coupled to the output of the temperature compensated current source and a reference output. The voltage reference circuit includes a self-cascode metal-oxide semiconductor field-effect transistor structure that includes a first device that is diode-connected and operates in a weak inversion saturation region and a second device that operates in a weak inversion triode region. A length of the second device is selectable. The voltage reference circuit is configured to provide a reference voltage on the reference output based on the reference current. | 05-27-2010 |
| 20110121809 | VOLTAGE REFERENCE CIRCUIT - A bandgap voltage reference unit on an integrated circuit ( | 05-26-2011 |
David Boas, Winchester, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20100217138 | Recognizing awareness in an anesthetized subject - A method for recognizing awareness in a subject includes performing optical imaging on at least one cortical region of the brain of the subject. Optical imaging data are obtained over time measuring one or more hemodynamic parameters in the at least one cortical region of the subject's brain. An observed variation pattern is determined in the measured hemodynamic parameters, and the observed variation pattern is compared to one or more known variation patterns characteristic of awareness. Substantial similarity between the observed and known variation patterns signals awareness in the subject. | 08-26-2010 |
David Alan Boas, Winchester, MA US
| Patent application number | Description | Published |
|---|---|---|
| 20110152249 | EVALUATING CENTRAL NERVOUS SYSTEM - Evaluating hemodynamic parameters in the cortex can be used as an objective test for CNS activity, e.g., pain. | 06-23-2011 |
Franz Edward Boas, Palo Alto, CA US
| Patent application number | Description | Published |
|---|---|---|
| 20080273651 | Methods and apparatus for reducing artifacts in computed tomography images - We present an iterative method for reducing artifacts in computed tomography (CT) images. In each iteration, constraints such as non-negativity are applied, then the image is blurred to guide convergence to a smoother image. Next, the image is modified using an algebraic reconstruction algorithm to try to match the projection data to within the experimental error. A mask is calculated which specifies which parts of the image to update during each iteration. The mask allows us to first solve regions of the image that are determined by rays with low photon counts (and thus high error). Then, regions of the image determined by rays with higher photon counts (and thus lower error), are solved using those ray sums. Reducing CT scan artifacts results in clearer and higher resolution images, faster scan times, and less radiation use. | 11-06-2008 |
Patronella Van Emde Boas, Roquebrune Cap-Martin FR
| Patent application number | Description | Published |
|---|---|---|
| 20090107153 | PRESSURE RELIEF OFFSHORE SYSTEM - An offshore hydrocarbon transfer system ( | 04-30-2009 |