51
Mustafa K Gurcan: Decision feedback equalizer and a method of operating a decision feedback equalizer. U S Philips Corporation, Jack D Slobod, January 15, 1991: US04985902 (82 worldwide citation)

A decision feedback equalizer includes a transversal feedforward digital filter section (16) and a recursive feedback digital filter section (18) including a decision stage (20). In order to optimize the performance of the equalizer, the reference tap position is preferably aligned with a storage lo ...


52
Thomas G Marshall Jr: Digital filter bank. Bell Telephone Laboratories Incorporated, Volker R Ulbrich, July 12, 1983: US04393456 (82 worldwide citation)

A digital filter bank (10) which has a discrete cosine transform section (12) and a polyphase network section (14) has the polyphase network section configured with a plurality of single input-double output digital filters (16). The filters have one of their outputs (36) independent of their present ...


53
Kelly H McClure, Gabriel Mouchawar: Efficient generation of sensing signals in an implantable medical device such as a pacemaker or ICD. Pacesetter, August 14, 2001: US06275734 (80 worldwide citation)

An implantable cardiac device such as a pacemaker or an implantable cardioverter defibrillator (ICD) that stores a broad band electrogram signal in response to the detecting of a particular cardiac event. The system includes an external programmer which is capable of accessing the stored electrogram ...


54
David Lipschutz: Delay interpolator for digital phased array ultrasound beamformers. Hewlett Packard Company, September 6, 1994: US05345426 (77 worldwide citation)

A delay interpolator for use in each channel of a digital ultrasound beamformer includes an FIR digital filter that is responsive to delay control information for delaying digital samples of the received beam by different delays that are quantized in increments less than the sampling period and a co ...


55
Jeffrey H Price, David A Gough: Method and means of least squares designed filters for image segmentation in scanning cytometry. Jeffrey H Price, Gray Cary Ware Freidenrich, August 4, 1998: US05790692 (77 worldwide citation)

In an image segmentation system that processes image objects by digital filtration, a digital filter is defined. The digital filter includes a neighborhood operator for processing intensity values of neighborhoods of pixels in a pixel array. A first pixel array is received defining a pixelated image ...


56
Maurice Georges Bellanger, Georges Bonnerot, Michel Coudreuse: Arrangement for processing auxiliary signals in a frequency multiplex transmission system. Telecommunications Radioelectriques et Telephoniques T R T, Frank R Trifari, Henry I Steckler, July 18, 1978: US04101738 (77 worldwide citation)

A circuit for converting into an FDM format spatially separated signalling signals and pilot signals, comprises a digital filter bank for converting the signals into the FDM format. A receiver for separating the signalling signals and pilot signals from the FDM signal comprises another digital filte ...


57
Richard M Mathis: Electronic gaming apparatus and method. Adam H Crosby Heafey Roach & May Tachner, April 25, 2000: US06053813 (75 worldwide citation)

A method for operating a microprocessor controlled, reel type slot machine in which payoff is determined before a final game outcome is displayed to a player. A pre-defined count of random numbers is generated and presented to a digital filter having tap outputs which correspond to paytable payline ...


58
Michael Sidman: Adaptive misposition correcting method and apparatus for magnetic disk servo system. Digital Equipment Corporation, Cesari and McKenna, August 20, 1985: US04536809 (72 worldwide citation)

A misposition correction system for correcting misposition errors due to spindle runout and other slowly varying errors in a servo positioning system of a magnetic disk storage device. The system includes means for dynamically measuring misposition error with respect to a data track centerline using ...


59
Adrian B Early: Chopper stabilized delta-sigma analog-to-digital converter. Crystal Semiconductor, Gregory M Howison, July 3, 1990: US04939516 (72 worldwide citation)

A chopper stabilized analog-to-digital converter includes an analog modulator (10) and a digital filter (12). The analog modulator (10) is comprised of two integrators (20) and (22). The first integrator (20) is a chopper stabilized integrator which is comprised of a chopper stabilized differential ...


60
Tsutomu Hamabe, Akio Kinoshita, Kazuhiro Doi, Kenichiro Muraoka, Noriharu Sato: Apparatus for actively reducing noise for interior of enclosed space. Nissan Motor, Hitachi, Lowe Price LeBlanc & Becker, August 9, 1994: US05337365 (71 worldwide citation)

An apparatus for reducing noise for an interior of enclosed space, e.g., a vehicular compartment using an FIR adaptive digital filter is disclosed in which a control circuit is provided which outputs drive signals to a plurality of loud speakers which generate control sounds to interfer with a noise ...