Patent application number | Description | Published |
20110316519 | Load Switch - A semiconductor device, circuit, and AC and DC load switch for maintaining a small input-output differential voltage and providing a defined response. The load switch can include a pass element coupled to an input terminal and an output terminal. The pass element can include a control terminal, with the control terminal controlling a response of the pass element. The load switch can include a first loop coupled to the control terminal configured to control a voltage drop between the input terminal and the output terminal while maintaining high impedance with the pass element. The load switch can include a second loop coupled to the control terminal configured to provide a defined filter response from the input terminal. The defined response can be a low pass response, high pass response, or a band pass response. The passband and/or stopband of the response can be programmed. | 12-29-2011 |
20140339897 | CONTROLLED SWITCHED CAPACITOR COEFFICIENTS - A switched capacitor circuit including two or more capacitors arranged in a switched capacitor circuit configuration with a comparator comparing a node whose potential varies with the charging of one or more of the switched capacitors. The switched capacitor circuit also has two or more current sources scaled relative to one another coupled to the capacitors and to the comparator, where the current from one current source charges at least two of the capacitors in series during the charge portion of the cycle, and the other current source charges at least one of but at least one fewer of the capacitor(s) during the charge portion of the cycle, and where the current sources are enabled at the beginning of the charge portion of the cycle, but where the comparator disables the current sources once the node reaches a reference potential. | 11-20-2014 |
20140344200 | LOW POWER INTEGRATED ANALOG MATHEMATICAL ENGINE - A method for creating on chip analog mathematical engines is provided utilizing a neural network with a switched capacitor structure to implement coefficients for weighted connections and error functions for the neural network. The neural networks are capable of any transfer function, learning, doing pattern recognition, clustering, control or many other functions. The switched capacitor charge controls allow for nodal control of charge transfer based switched capacitor circuits. The method reduces reliance on passive component programmable arrays to produce programmable switched capacitor circuit coefficients. The switched capacitor circuits are dynamically scaled without having to rely on switched in unit passives, such as unit capacitors, and the complexities of switching these capacitors into and out of circuit. The current, and thus the charge transferred is controlled at a nodal level, and the current rather than the capacitors are scaled providing a more accurate result in addition to saving silicon area. | 11-20-2014 |
20150016165 | GATED THYRISTOR POWER DEVICE - An improved gated thyristor that utilizes less silicon area than IGBT, BIPOLARs or MOSFETs sized for the same application is provided. Embodiments of the inventive thyristor have a lower gate charge, and a lower forward drop for a given current density. Embodiments of the thyristor once triggered have a latch structure that does not have the same Cgd or Ccb capacitor that must be charged from the gate, and therefore the gated thyristor is cheaper to produce, and requires a smaller gate driver, and takes up less space than standard solutions. Embodiments of the inventive thyristor provide a faster turn off speed than the typical >600 ns using a modified MCT structure which results in the improved tail current turn off profile (<250 ns). Additionally, series resistance of the device is reduced without comprising voltage blocking ability is achieved. Finally, a positive only gate drive means is taught as is a method to module the saturation current using the gate terminal. | 01-15-2015 |
20150045684 | HEART RATE EXTRACTION USING NEURAL WAVELET ADAPTIVE GAIN CONTROL AND NEURAL PATTERN PROCESSING - An improved heart rate monitor is provided that can detect and distinguish a heartbeat from an otherwise contaminated system with noise components potentially larger than the signal of interest. Embodiments of the inventive monitor have an amplification system that eliminates large noise components so as not to saturate the system during detection of a desired low amplitude signal. In embodiments the elimination of noise components is accomplished through wavelet decomposition, and the removal of undesired components including interference components during adaptive gain control (AGC), in addition to hunting algorithms which minimize the error with techniques such as neural network least mean squares type back propagation algorithms. | 02-12-2015 |
20150079901 | ISOLATOR - A monolithic isolator circuit is provided which replaces optocoupler feedback configurations which are prone to wear out, lack reliability, and bandwidth limitations. By communicating only a subset of a sigma delta modulators quantizer across the isolator but closing the modulator loop on the primary side, much wider bandwidth communications of analog information can be achieved than with optocouplers. This allows for the use of the proposed isolator for cycle by cycle loop control and protection functions which previously required components on the local side of the isolation. The monolithic isolator circuit can be extended to isolate analog to digital converters (ADC), analog buffers, and to isolated current sense amplifiers (CSA). The monolithic isolator circuit utilizes a z-domain differential delay line to create an error in conformance with the difference between the feedback magnitude and a reference. Z-domain differential delay lines have a fast response, and may be windowed and event driven making these delay lines very current efficient. The conformance error may be fed to a digital compensator (such as a proportional-integral-derivative (PID) compensator) and finally to a z-domain modulator. The z-domain modulator may be one of several constructions, however, to achieve a reasonable number of bits a delta sigma structure, such as an error feedback structure, is utilized for the modulator. | 03-19-2015 |