Did You Know...
...that several people are credited with the invention of the flush toilet? Most people have heard of Thomas Crapper (1837-1910), the sanitary engineer who invented the valve-and-siphon arrangement that made the modern toilet possible. Another claimant to "the throne" was British inventor Alexander Cumming who patented a toilet in 1775. Then there's a nameless Minoan (a native of ancient Crete) who lived 4,000 years ago who supposedly was ahead of his time and created the first flush toilet!
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8103711 | Dispersion compensation using digital infinite impulse response filtering Methods and systems for novel infinite impulse response filtering system to allow DC using a complex input signal having a real and imaginary part of the complex input signal yr and yi to produce a real part of a dispersion-compensated signal X... | 01/24/2012 |
| 8078659 | Reduction of digital filter delay An apparatus for reducing a digital filter delay includes means for determining the magnitude response of a desired filter. Means form the real cepstrum of this magnitude response. Means transform the real cepstrum into a complex cepstrum of a corresponding minimum-... | 12/13/2011 |
| 8073890 | Continuous high-frequency event filter A circuit and method for generating an active output signal in response to detecting N events, which are represented by an event signal. A counter circuit is configured to increment and decrement through a sequence of values in response to the event signal. Detectio... | 12/06/2011 |
| 8069197 | Method and apparatus for periodic noise suppression in transient signals A system for cyclical noise removal from a transient signal is employed with a transient sensor for a signal. A signal conditioner is connected to the transient sensor for processing the signal. A transient digitizer captures the processed signal including capture o... | 11/29/2011 |
| RE42809 | Method and apparatus for increasing bandwidth in sampled systems Systems that sample a continuous analog time-domain signal.The invention is particularly applicable to systems that sample a continuous analog time-domain signal and whose analog components have a bandwidth limit below that desired or specified. The invention has be... | 10/04/2011 |
| 8028013 | Fast filtering means and filtering and decimation methods The invention relates to a hardware implemented filtering method including establishing a representation DIS of the derivative of at least a part of a time-quantized input signal IS, and establishing at least one sample of a time- and amplitude-quantized output sign... | 09/27/2011 |
| 8019803 | Method and device for restoring degraded information The present invention provides a technology which can perform a precise restoration to a distribution of original information by carrying out an iterative calculation using only a distribution of degraded information. The method according to the present invention pe... | 09/13/2011 |
| 8001169 | Spread spectrum method with elimination of sub-bands A spread spectrum method for a digital input signal (x(n)), comprising the following steps: coefficients of a reversible digital periodical linear filter are selected in such a way that the spectrum of the input signal (x(n)) is spread in order to occupy a spread fr... | 08/16/2011 |
| 7991813 | Methods and systems for efficient filtering of digital signals A method in a signal processor for filtering samples in a digital signal is provided. An approximate filtered sample is generated as a function of four samples of the digital signal. A correction is generated as a function of the four samples, and a filtered sample ... | 08/02/2011 |
| 7979483 | Multiplexed proportional-integral-derivative filter architecture (Mux-PID) for control-loop applications A multiplexed digital proportional-integral-derivative filter receives error signal samples and operates in different states during sub-cycles of a single system cycle. A single multiplier and a single adder within the filter calculate at least portions of a proport... | 07/12/2011 |
| 7958176 | Identifying filter coefficients Techniques for identifying coefficients are described. A technique collects sample input values to the filter and identifies desired output values from the filter for the collected sample input values. The technique then generates a power spectrum of the collected s... | 06/07/2011 |
| 7937428 | System and method for generating and using a dynamic bloom filter A dynamic Bloom filter comprises a cascaded set of Bloom filters. The system estimates or guesses a cardinality of input items, selects a number of hash functions based on the desired false positive rate, and allocates memory for an initial Bloom filter based on the... | 05/03/2011 |
| 7930334 | Gain control coding within proportional-integral-derivative filters for control-loop applications Proportional, integral and derivative error gains within a proportional-integral-derivative filter are selected based on a magnitude of the error value and with successively higher gain values corresponding to larger ranges of error values. Coding of the error gains... | 04/19/2011 |
| 7917561 | Partially complex modulated filter bank An apparatus for processing a plurality of real-valued subband signals using a first real-valued subband signal and a second real-valued subband signal to provide at least a complex-valued subband signal comprises a multiband filter for providing an intermediate rea... | 03/29/2011 |
| 7912885 | Method and system for filtering of networked, synchronized measurements A system processes discrete digital data according to a function, the discrete digital data including data values and time stamps, the time stamps being at non-uniform time intervals according to a time scale. The system comprises a processor having program instruct... | 03/22/2011 |
| 7912884 | Method and apparatus for implementing finite impulse response filters without the use of multipliers A finite impulse response filter is implemented as a sum of individual component, running-sum filters. The sum of all of the component filters required for a desired filter response is calculated in an accumulator and only the component filters' update terms, which ... | 03/22/2011 |
| 7908306 | SRC with multiple sets of filter coefficients in memory and a high order coefficient interpolator Systems and methods for converting a data stream from a first sample rate to a second sample rate using a sample rate converter that employs selectable filters. In one embodiment, the filters are implemented by providing multiple sets of filter coefficients in a mem... | 03/15/2011 |
| 7904495 | Repetitive controller to compensate for odd harmonics A repetitive controller scheme with negative feedback and feedforward introduces infinitely many poles on the imaginary axis located at the resonant peaks. The feedforward introduces zeros, which produce notches located in between two consecutive resonant peaks. The... | 03/08/2011 |
| 7904497 | Hardware arithmetic engine for lambda rule computations A recursive lambda rule engine (114, 302) includes a first multiplier (204) that sequentially multiplies each of series of inputs by a nonlinearity determining parameter and supplies results to a second multiplier (214) that multiplies the outpu... | 03/08/2011 |
| 7904496 | Method and system for selecting effective tap values for a digital filter Systems and methods are provided for determining effective tap values for a digital filter. A first plurality of vectors is generated, wherein each of the first plurality of vectors represents a set of tap values for the filter at a first resolution. A best vector i... | 03/08/2011 |
| 7856463 | Probability density function separating apparatus, probability density function separating method, testing apparatus, bit error rate measuring apparatus, electronic device, and program There is provided a probability density function separating apparatus that separates a predetermined component from a given probability density function. The apparatus includes: a domain transforming section that is supplied with the probability density function and... | 12/21/2010 |
| 7840624 | Digital low pass filter Over-sampled data is filtered by receiving a word of over-sampled data including sample bits for each of a plurality of data bits, detecting a sample bit having one logic value and, on either side of it, bits having the opposite logic value and, upon such detection,... | 11/23/2010 |
| 7814137 | Combined interpolation and decimation filter for programmable logic device A programmable logic device can be configured as a finite impulse response (FIR) filter capable of operating in either interpolation mode or decimation mode and of switching between those modes at run time. The FIR filter structure can be mapped onto a specialized p... | 10/12/2010 |
| 7788308 | Frequency float method and system for realizing a signal filter A method for realizing a digital filter in an electronic system. The method includes first determining the specific number of coefficients to be calculated for a design filter and calculating the value of some of the coefficients for the design filter, typically all... | 08/31/2010 |
| 7779061 | Repetitive controller for compensation of periodic signals A repetitive controller scheme with positive feedback and feedforward introduces infinitely many poles on the imaginary axis located at the resonant peaks. The feedforward introduces zeros, which produce notches located in between two consecutive resonant peaks. The... | 08/17/2010 |
| 7698354 | Programmable engine core for executing digital signal processing functions A flexible engine for implementing digital signal processing (DSP) functions involving repeating various arithmetic/logical operations on a stream of data includes multiple programmable filter elements, at least one of which includes a microcode control program for ... | 04/13/2010 |
| 7693922 | Method for preprocessing a signal and method for signal processing A method for preprocessing a signal, wherein an iterative process with at least one iteration is performed to generate an output signal based on an input signal. In each iteration a preceding intermediate output signal and the input signal is received. A process is ... | 04/06/2010 |
| 7693923 | Digital filter system whose stopband roots lie on unit circle of complex plane and associated method A method is disclosed for providing a digital filter system for providing a low pass filter function to a digital input. The method includes the steps of determining a finite impulse response of the input, determining a transfer function of the finite impulse respon... | 04/06/2010 |
| 7685216 | Automatic input error recovery circuit and method for recursive digital filters Recursive digital filter circuitry which avoids persistent unstable conditions therein provides a serial clock signal, a synchronization signal, and a serial data input to corresponding inputs of a 3-wire serial interface circuit to produce a serial clock output sig... | 03/23/2010 |
| 7640281 | Digital signal control using first order holds A method is provided to reduce delay in signal processing of a digital control system. The method includes receiving outputs from a digital controller at a first frequency. A pre-load data value is then loaded into an accumulator register and output to a digital to ... | 12/29/2009 |
| 7620673 | Complimentary discrete fourier transform processor Method and apparatus for a complimentary discrete Fourier transform processor. An input signal is sampled, samples then being sequentially delayed, channelized, and processed. Synthesized outputs are provided in complimentary form. Channels are independent so as to ... | 11/17/2009 |
| 7617267 | Configurable multi-tap filter One embodiment of a configurable multi-tap filter includes a parallel-to-serial formatter configured to transform a pixel stream into a first component pixel stream and a second component pixel stream, a configurable memory that includes a first channel and a second... | 11/10/2009 |
| 7613758 | Method for optimization of Q-Filter kernel parameters A Q-Filter is a reconfigurable technique that performs a continuum of linear and nonlinear filtering operations. It is modeled by unique mathematical structure, utilizing a function called the Q-Measure, defined using a set of adjustable kernel parameters to enable ... | 11/03/2009 |
| 7603399 | Method and device for forming noise-filtered output values from input values encumbered with noise A method for noise filtering and a noise filter are for the filtering of override signals in a numerical control system. If an input value change condition is present, an accumulator is reset and an input value is set as the new output value of noise filter. If a no... | 10/13/2009 |
| 7584235 | Variable passband autoregressive moving average filter A variable passband ARMA filter has as inputs a signal to be filtered, a reverse version of the signal to be filtered and a variable coefficient to produce as an output a filtered signal. The variable coefficient is generated by a variable equivalent sample rate coe... | 09/01/2009 |
| 7571202 | Method and apparatus for digital noise mask filtering A system and method for filtering spurious transitions from a digital signal is disclosed. The system includes a latch, a timer, and a logic circuit. Upon a transition of the digital signal, the latch holds the digital signal to block any additional transitions and ... | 08/04/2009 |
| 7558814 | Realization method of self-equalized multiple passband filter A realization method of a multiple passband filter that equalizes a group delay without using an external equalizer is disclosed. The realization method includes the steps of: a) calculating a transfer function based on poles and zeros; b) extracting an input/output... | 07/07/2009 |
| RE40802 | Digital frequency response compensator and arbitrary response generator system A digital signal processing system capable of compensating for frequency response variations and generating a response characteristic that complies with a provided specification. The system automatically generates digital filters to provide this compensation with al... | 06/23/2009 |
| 7480689 | Systolic de-multiplexed finite impulse response filter array architecture for linear and non-linear implementations Described is a finite impulse filter response (FIR) filter for use by signal processors. A demultiplexer receives input data samples at an input data rate. The FIR filter includes a plurality of computational units arranged in a systolic array of taps and phases. Ea... | 01/20/2009 |
| 7467171 | Digital filter device In a digital filter device which filters a plurality of signals by a single digital filter, an input data memory stores the input data strings generated by computing processors, and a digital filter reads the input data strings in a predetermined sequence to be filt... | 12/16/2008 |
