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...that the first rickshaw was invented in 1869 by an American Baptist minister, the Rev. E. Jonathan Scobie, to transport his invalid wife around the streets of Yokohama?
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| Number | Title | Issue Date |
| 7423564 | Optical signal processing device for A/D converter including optical encoders with nonlinear loop mirrors An optically sampling device optically samples an optical analog signal using a sampled signal having a predetermined sampling frequency, and outputs control light having a pulse train of an optically sampled optical analog signal. A signal generating device generat... | 09/09/2008 |
| 7356424 | Diagnostic compiler for pipeline analog-to-digital converter, method of compiling and test system employing the same The present invention is directed to a diagnostic compiler for use with a pipeline analog-to-digital converter (ADC) having code sequences corresponding to stages thereof. In one embodiment, the diagnostic compiler includes a transition locator configured to determi... | 04/08/2008 |
| 7348908 | Linearity corrector using filter products A linearity corrector is provided that reduces distortion in a signal processing system, such as an ADC. The linearity corrector provides a first order signal path having distortion components connected to an adder, and a filter product circuit that is also connecte... | 03/25/2008 |
| 7332877 | Light controller A light controller capable of varying the brightness of a light emitting diode in a linear manner. The light controller may control a number of lights in a predetermined pattern or in a pattern designed by the user. A remote control may be used to control and intera... | 02/19/2008 |
| 7312736 | Trading off visibility for volume of data when profiling memory events When tracing memory events the required bandwidth may be reduced by forming a logical OR of several memory event signals to determine the location of memory events. A second trace run may be made after this, tracing only the limited portions of the application where... | 12/25/2007 |
| 7254519 | Multi channel multiplexed inspection system and method Provided are systems and methods for multi-channel non-destructive inspection which provide high data throughput, logarithmic amplification of large dynamic range, and simplicity of supporting electronics. More specifically, provided are systems and methods for insp... | 08/07/2007 |
| 7231325 | System for evaluating a sensor signal The inventive device for evaluating the sensor signal includes the provider for providing the sensor signal, the processor for processing the sensor signal and for providing an information signal comprising information regarding the amplitude course of the sensor si... | 06/12/2007 |
| 7212592 | Digitally programmable gain control circuit A digitally programmable gain control circuit and method of operating the same is disclosed. The gain control circuit includes a programmable gain amplifier having an amplifier structure represented by a plurality of overlapping discrete monotonic transfer function ... | 05/01/2007 |
| 7158157 | Light emitting device and electronic apparatus using the same Providing a light emitting device capable of suppressing the variations of luminance of OLEDs associated with the deterioration of an organic light emitting material, and achieving a consistent luminance. An input video signal is constantly or periodically sampled t... | 01/02/2007 |
| 7148629 | Aging circuit for organic electro luminescence device and driving method thereof An aging circuit for an organic electro luminescence device includes a plurality of pixels arranged in a matrix at intersection areas of row lines and column lines and an aging circuit having at least one aging AC voltage source to apply a specific aging AC voltage ... | 12/12/2006 |
| 7135824 | Systems and methods for controlling illumination sources Provided are methods and systems for controlling the conversion of data inputs to a computer-based light system into lighting control signals. The methods and systems include facilities for controlling a nonlinear relationship between data inputs and lighting contro... | 11/14/2006 |
| 7061740 | System and method for protecting an audio amplifier output stage power transistor A system and method for protecting an output transistor in an audio amplifier output stage includes a protection circuit that protects the output transistor from excessive currents and voltages, and does not interfere with the normal operation of the output transist... | 06/13/2006 |
| 7049872 | Use of analog-valued floating-gate transistors to match the electrical characteristics of interleaved and pipelined circuits Methods of and apparatuses for matching the signal delay, clock timing, frequency response, gain, offset, and/or transfer function of signal pathways in electrical circuits such as, for example, time-interleaved and pipelined circuits using analog-valued floating-ga... | 05/23/2006 |
| 7049991 | Semiconductor device, digital-analog converter and display device thereof A semiconductor device having a voltage-current conversion function, a digital-analog conversion function, and a gamma correction function is provided. A digital input signal (voltage) is input from an input terminal of a switching circuit. The switching circuit sel... | 05/23/2006 |
| 6922454 | Direct conversion radio receiving system using digital signal processing for channel filtering and down conversion to base band A radio receiving system, which receives an input signal in a direct conversion receiving mode through the use of a plurality of cascaded channel filters, each including a complex coefficient filter, to obtain a desired waveform, wherein a center frequency of a prel... | 07/26/2005 |
| 6909389 | Method and apparatus for calibration of an array of scaled electronic circuit elements A method and apparatus for calibrating an electronic circuit which required scaled matching of some or all of its electronic components with nonvolatile programmably trimmable parameter sources (current, voltage, resistance, capacitance) is carried out in a top-down... | 06/21/2005 |
| 6901108 | Apparatus and method for adaptive control An adaptive controller generates a sequence of dither signals for each of a plurality of control parameters. Each dither signal sequence is uncorrelated with every other dither signal sequence. Each nominal control signal has the first of its respective dither signa... | 05/31/2005 |
| 6897842 | Nonlinearly mapping video date to pixel intensity while compensating for non-uniformities and degradations in a display Timing information may be embedded along with other display control information in a signal using a pulse width modulation (PWM) mechanism to controllably drive a display (e.g., a plurality of display elements forming an array of display elements). In one embodiment... | 05/24/2005 |
| 6778126 | Structures and methods that improve the linearity of analog-to-digital converters with introduced nonlinearities Analog-to-digital converter (ADC) structures and methods are provided that reduce an initial converter nonlinearity by introducing an inverse nonlinearity into the converter's response that is substantially the inverse of the initial converter nonlinearity. In a pip... | 08/17/2004 |
| 6525683 | Nonlinearly converting a signal to compensate for non-uniformities and degradations in a display A digital signal directed to a display (e.g., a plurality of display elements forming an array of display elements) may be converted into an analog signal using a nonlinear relationship. In one embodiment, a drive signal may be provided to at least one di... | 02/25/2003 |
| 6507347 | Selected data compression for digital pictorial information This invention provides a method and apparatus to selectively compress digital image data for the supply of that information to digital display screens or storage. The invention utilizes a digital input containing a non-linear representation between the v... | 01/14/2003 |
| 6489911 | Direct digital waveform synthesizer with DAC error correction A direct digital waveform synthesiser with DAC error correction includes a digital to analog converter system for producing a desired output waveform and having between its digital and analog output a characteristic having a linear component and a non-lin... | 12/03/2002 |
| 6463093 | METHOD AND APPARATUS TO REDUCE SPURIOUS AND INTERMODULATION PRODUCTS IN WIRELESS BROADBAND MULTI-CARRIER DIGITAL TRANSCEIVER EQUIPMENT THROUGH STATIC NON-LINEARITY CORRECTION OF DIGITAL CONVERSION COMPONENTS Apparatus and method to perform the real-time correction of differential non-linearities in a broadband wireless transceiver system using a digital look-up table. Initially, the values for the digital look-up table are determined prior to full operational... | 10/08/2002 |
| 6448754 | BIST method for testing cut-off frequency of low-pass filters A method and circuitry for implementing a built-in self test (BIST) for determining the frequency characteristics of filter circuits in mixed-signal integrated circuits (ICs). The method comprises inserting a Circuit Under Test (CUT) into a feedback loop ... | 09/10/2002 |
| 6373471 | Keyboard with interchangeable connection function A keyboard with interchangeable connection specification, comprises an input/output circuit board for DIN, PS/2 or USB connection specification and replaceably assembled within a main body of the keyboard. The input/output circuit board has signal transmi... | 04/16/2002 |
| 6337643 | Method and device for generating a random signal and digital-to-analog converting systems using same A process and device for generation of a random signal, and a digital-analog conversion system using such a random signal. The process includes a first noise generation step, a second noise filtering step to obtain a signal x(t) with a predetermined spect... | 01/08/2002 |
| 6043768 | Device and method for switching between different operating modes of a transducer A device and method for data transmission between a transducer and a processing unit which are coupled by one or several signal transmission lines, to selectively activate at least two different modes of operation of the transducer. The device includes a ... | 03/28/2000 |
| 5822225 | Self-calibrating data processors and methods for calibrating same Highly accurate, self-calibrating data processors and methods for calibrating the same use internal analog references with negligible time and temperature drifts. A first input reference signal set generated by any accurate, precision analog reference is ... | 10/13/1998 |
| 5751235 | System and method for enhancing joystick performance A joystick system is designed to provide a modified digital representation of the setting of a joystick potentiometer. The system operates to compensate for non-linearities and offsets in the joystick response, or may be used to enhance or vary the joysti... | 05/12/1998 |
| 5638073 | Method of linearizing variations in the transfer characteristic of a D/A converter, as well as an arrangement and use thereof A method is provided for linearizing variations in a transfer characteristic of a digital-to-analog (D/A) converter to which a digitized input signal is fed for being converted to an analog output signal. The method includes balancing the D/A converter so... | 06/10/1997 |
| 5594612 | Analog-to-digital converter with digital linearity correction A analog calibration signal including at least one frequency component is generated by a very pure signal source, such as a digital oscillator and a digital-to-analog converter (DAC) that has been calibrated to be ultralinear. The analog calibration signa... | 01/14/1997 |
| 5594439 | Diagnosing problems in an electrical system by monitoring changes in nonlinear characteristics Abnormal changes in the non-linear characteristics of electronic components are an indication of abnormal conditions such as impending component or system failure. To detect such abnormal changes in nonlinearity, an electronic circuit is subjected to a ca... | 01/14/1997 |
| 5196851 | Linearizing non-linear analog-to-digital process and circuit A circuit for linearizing analog-to-digital output is shown in FIG. 2, with an analog signal Vi transmitted by input circuit 10 is applied to an input port of an analog-to-digital converter 12 controlled by a sampling signal Vs, to p... | 03/23/1993 |
| 5121120 | Programmable digital measuring and control instrument for a vacuum gauge A digital and programmable measuring and control instrument comprising a digital-analog converter receiving an analog signal from a pressure transducer and converting it into a digital signal and dividing the same in about 4,000 parts separated in thousan... | 06/09/1992 |
| 5113188 | Analog-to-digital converter utilizing devices with current versus voltage characteristics with a plurality of peaks and negative resistance regions between peaks An analog-to-digital converter circuit is disclosed for receiving an analog input signal and producing a digital output having a plurality of binary bits representative of the input signal. A number of devices are utilized, each of which has a voltage ver... | 05/12/1992 |
| 5061927 | Floating point analog to digital converter A floating point analog to digital converter having an exponent converter which divides the input signal successively one-half until the divided signal is within the range of a mantissa linear analog to digital converter. The exponent converter also gener... | 10/29/1991 |
| 5047771 | Apparatus for implementation of desired input/output function in an electronic system having a plurality of channels Apparatus for providing a desired output signal as a function of a single-valued input signal in an electronic system, includes: an addressable memory, having a plurality L locations, each for storage of a data word of B bits; a circuit for storing in eac... | 09/10/1991 |
| 5047769 | Methods of correcting data conversion/transfer errors in a vibratory energy imaging system utilizing a plurality of channels A method for correcting data conversion/transfer errors in each of a plurality N of channels of a vibratory energy imaging system, by: providing an addressable memory having a plurality L=2M locations, each for storage of a data word of B bits;... | 09/10/1991 |
| 5043730 | Digital-analog conversion circuit with application of voltage biasing for distortion stabilization A digital-analog converter circuit comprising a current output type digital-analog converter and a current/voltage converter connected to an output terminal of the current output type digital/analog converter, the current/voltage converter including bias ... | 08/27/1991 |
| 5023490 | Analog signal compression circuit A desired non-linear, monotonic compression function is performed substantially symmetrically upon both polarities of an AC signal by a circuit having a plurality of limiting stages, each having input circuitry with like terminals connected in parallel to... | 06/11/1991 |
