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| Number | Title | Issue Date |
| 8125364 | Data compression/decompression method A compression engine starts compressing data by a preset first compression rule, compresses the following data by a second compression rule when the characteristics of the data satisfy a predetermined switching condition, and returns to the first compression rule wh... | 02/28/2012 |
| 7333400 | Regulated low power control system for electrostatic actuators The invention concerns a control system for a servomechanism comprising a control member that can move between first and second positions defining a variable electric quantity respectively between a minimum quantity and a maximum quantity, characterized in that the ... | 02/19/2008 |
| 7224819 | Integrating digital watermarks in multimedia content A method for tracking media signals in multimedia content is provided by uniquely identifying the multimedia content with a digital watermark identifier. A video channel is preferably embedded with a first watermark identifier. The first identifier uniquely identifi... | 05/29/2007 |
| 7111094 | System, method and algorithm for the optimization of entropy for lossless compression A system, method and algorithm for performing statistical analysis on an input data source to determine an optimal token size resulting in an increased ratio value is described. Changes to the values of the tokens prior to compression may result in an overall compre... | 09/19/2006 |
| 7075472 | Averaging analog-to-digital converter with shared capacitor network An analog-to-digital converter has one or more first stage comparators for generating a set of first stage comparator digital outputs, and a set of first stage comparator analog outputs upon comparing a voltage input with a set of voltage references, a switch networ... | 07/11/2006 |
| 7058231 | Methods and apparatus for data compression with a hybrid context A plurality of compression schemes are provided that achieve improved compression ratios. A first embodiment provides for compression of each pixel by one of a plurality of different entropy-based compression schemes based upon a probability cost analysis. A second ... | 06/06/2006 |
| 6954169 | 1/f noise, offset-voltage charge injection induced error cancelled op-amp sharing technique The present invention provides an apparatus and method for reducing and canceling 1/f noise, offset voltage, and charge injection introduced in pipeline ADCs in conventional op-amp sharing techniques. The polarity of the residue signals is changed at each phase. Dur... | 10/11/2005 |
| 6529150 | Photonic analog to digital conversion based on temporal and spatial oversampling techniques A method of converting an analog signal to a digital signal includes (a) filtering the analog signal to the range 0ࣘfxࣘf.sub.B ; (b) sampling the filtered signal at a rate fS >>fN, where fS is the sampling f... | 03/04/2003 |
| 6529151 | Measuring apparatus and method which delivers a signal indicative of a measured value to an external signal device via a signal line There is provided a measuring apparatus that is constructed such that an analog signal indicative of the difference between a target value and a measured value obtained by a gauge is outputted to an external device via a single signal line, while securing... | 03/04/2003 |
| 6369741 | Optimization of the parameters of a pre-equalization low pass filter for a read channel A method is provided for defining programmed values of the boost and cut-off frequency parameters of a low pass filter of pre-equalization, of a read channel for a magnetic medium mass memory device, to ensure optimal functioning conditions of the adaptiv... | 04/09/2002 |
| 6255978 | Serial pipeline DAC with Gamma correction function A method and apparatus for converting digital input signal to analog voltage are disclosed herein. The converting apparatus includes the following devices device. One of the pair of reference voltage selecting means is used to select a first voltage level... | 07/03/2001 |
| 5870050 | Electronic monitoring of the driving force of a drive mechanism The present invention relates to an electronic circuit and a method for the monitoring of the driving force of a drive mechanism. To reduce the costs for such a circuit by simple technical circuit measures it is provided that the comparator unit used for ... | 02/09/1999 |
| 4990916 | Single-supply digital-to-analog converter for control function generation A converter for producing the function Vout =Vbias =Vswing (1-2D), in which a DAC is combined with an operational amplifier and (typically) three or four resistors. A function of the voltage Vswing, or a current... | 02/05/1991 |
| 4515997 | Direct digital loudspeaker A method of and apparatus for converting a digital signal to sound, the digital signal being encoded in a sequence of code words at a signal encoding frequency, the code words representing the analog sound pressure of an original audio signal, with decodi... | 05/07/1985 |
| 4323884 | Digital-analog interface for insertion between a digital control signal transmitter and a controlled moving element This invention relates to a digital-analog interface for insertion between the control circuit of a moving element and a transmitter of digital control signals. This interface comprises an inductive detector of the actual position of the moving element. T... | 04/06/1982 |
| 4034365 | Most restrictive digital to analog converter This disclosure relates to an electronic converter circuit for a cab signal system employing a negative feedback type of operational amplifier and two banks of resistive and diode elements. One bank of resistive and diode elements electrically couples the... | 07/05/1977 |
