Assignee
CIRRUS LOGIC INC
US·1,351 granted patents·21 pending applications·50,507 citations·filing 1987–2018
Top patents by PatentIndex Score
1,372 records- 0199US9532139B1Dual-microphone frequency amplitude response self-calibrationCIRRUS LOGIC INC·Filed 2012·Granted Dec 27, 2016·108 cites·13 claims
- 0299US7894216B2Switching power converter with efficient switching control signal period generationCIRRUS LOGIC INC·Filed 2008·Granted Feb 22, 2011·120 cites·26 claims
- 0399US7852017B1Ballast for light emitting diode light sourcesCIRRUS LOGIC INC·Filed 2008·Granted Dec 14, 2010·178 cites·22 claims
- 0499US7821237B2Power factor correction (PFC) controller and method using a finite state machine to adjust the duty cycle of a PWM control signalCIRRUS LOGIC INC·Filed 2008·Granted Oct 26, 2010·83 cites·35 claims
- 0599US7804256B2Power control system for current regulated light sourcesCIRRUS LOGIC INC·Filed 2008·Granted Sep 28, 2010·205 cites·30 claims
- 0699US7759881B1LED lighting system with a multiple mode current control dimming strategyCIRRUS LOGIC INC·Filed 2008·Granted Jul 20, 2010·382 cites·32 claims
- 0799US7719246B2Power control system using a nonlinear delta-sigma modulator with nonlinear power conversion process modelingCIRRUS LOGIC INC·Filed 2007·Granted May 18, 2010·111 cites·21 claims
- 0899US7719248B1Discontinuous conduction mode (DCM) using sensed current for a switch-mode converterCIRRUS LOGIC INC·Filed 2008·Granted May 18, 2010·138 cites·35 claims
- 0999US7288902B1Color variations in a dimmable lighting device with stable color temperature light sourcesCIRRUS LOGIC INC·Filed 2007·Granted Oct 30, 2007·431 cites·19 claims
- 1099US7183957B1Signal processing system with analog-to-digital converter using delta-sigma modulation having an internal stabilizer loopCIRRUS LOGIC INC·Filed 2005·Granted Feb 27, 2007·127 cites·21 claims
- 1199US6727832B1Data converters with digitally filtered pulse width modulation output stages and methods and systems using the sameCIRRUS LOGIC INC·Filed 2002·Granted Apr 27, 2004·133 cites·34 claims
- 1299US6510098B1Method and apparatus for transferring data in a dual port memoryCIRRUS LOGIC INC·Filed 1997·Granted Jan 21, 2003·422 cites·10 claims
- 1399US6373334B1Real time correction of a digital PWM amplifierCIRRUS LOGIC INC·Filed 2000·Granted Apr 16, 2002·177 cites·20 claims
- 1499US6009549ADisk storage system employing error detection and correction of channel coded data, interpolated timing recovery, and retroactive/split-segment symbol synchronizationCIRRUS LOGIC INC·Filed 1997·Granted Dec 28, 1999·249 cites·37 claims
- 1599US5585975AEqualization for sample value estimation and sequence detection in a sampled amplitude read channelCIRRUS LOGIC INC·Filed 1994·Granted Dec 17, 1996·227 cites·29 claims
- 1699US5406279AGeneral purpose, hash-based technique for single-pass lossless data compressionCIRRUS LOGIC INC·Filed 1992·Granted Apr 11, 1995·273 cites·96 claims
- 1798US9577587B2Switched mode amplifier with single-ended buck modeCIRRUS LOGIC INC·Filed 2015·Granted Feb 21, 2017·25 cites·18 claims
- 1898US9071267B1Multi-path analog front end and analog-to-digital converter for a signal processing systemCIRRUS LOGIC INC·Filed 2014·Granted Jun 30, 2015·80 cites·24 claims
- 1998US8018171B1Multi-function duty cycle modifierCIRRUS LOGIC INC·Filed 2008·Granted Sep 13, 2011·116 cites·16 claims
- 2098US7903825B1Personal audio playback device having gain control responsive to environmental soundsCIRRUS LOGIC INC·Filed 2006·Granted Mar 8, 2011·129 cites·28 claims
- 2198US7863828B2Power supply DC voltage offset detectorCIRRUS LOGIC INC·Filed 2007·Granted Jan 4, 2011·61 cites·20 claims
- 2298US7808324B1Operating environment and process position selected charge-pump operating mode in an audio power amplifier integrated circuitCIRRUS LOGIC INC·Filed 2009·Granted Oct 5, 2010·80 cites·21 claims
- 2398US7746043B2Inductor flyback detection using switch gate change characteristic detectionCIRRUS LOGIC INC·Filed 2007·Granted Jun 29, 2010·71 cites·23 claims
- 2498US7667408B2Lighting system with lighting dimmer output mappingCIRRUS LOGIC INC·Filed 2007·Granted Feb 23, 2010·86 cites·23 claims
- 2598US7554473B2Control system using a nonlinear delta-sigma modulator with nonlinear process modelingCIRRUS LOGIC INC·Filed 2007·Granted Jun 30, 2009·70 cites·25 claims
- 2698US6741123B1Delta-sigma amplifiers with output stage supply voltage variation compensation and methods and digital amplifier systems using the sameCIRRUS LOGIC INC·Filed 2002·Granted May 25, 2004·124 cites·8 claims
- 2798US6232899B1Analogue and digital convertorsCIRRUS LOGIC INC·Filed 1999·Granted May 15, 2001·169 cites·25 claims
- 2898US6002299AHigh-order multipath operational amplifier with dynamic offset reduction, controlled saturation current limiting, and current feedback for enhanced conditional stabilityCIRRUS LOGIC INC·Filed 1997·Granted Dec 14, 1999·226 cites·89 claims
- 2998US5844920AThermal asperity compensation using multiple sync marks for retroactive and split segment data synchronization in a magnetic disk storage systemCIRRUS LOGIC INC·Filed 1996·Granted Dec 1, 1998·224 cites·34 claims
- 3098US5802118ASub-sampled discrete time read channel for computer storage systemsCIRRUS LOGIC INC·Filed 1996·Granted Sep 1, 1998·188 cites·42 claims
- 3198US5701314AOn-the-fly error correction using thermal asperity erasure pointers from a sampled amplitude read channel in a magnetic disk driveCIRRUS LOGIC INC·Filed 1995·Granted Dec 23, 1997·195 cites·14 claims
- 3298US5485595AFlash memory mass storage architecture incorporating wear leveling technique without using cam cellsCIRRUS LOGIC INC·Filed 1993·Granted Jan 16, 1996·561 cites·15 claims
- 3398US5479638AFlash memory mass storage architecture incorporation wear leveling techniqueCIRRUS LOGIC INC·Filed 1993·Granted Dec 26, 1995·464 cites·41 claims
- 3498US5388083AFlash memory mass storage architectureCIRRUS LOGIC INC·Filed 1993·Granted Feb 7, 1995·449 cites·24 claims
- 3597US9525940B1Multi-path analog front end and analog-to-digital converter for a signal processing systemCIRRUS LOGIC INC·Filed 2014·Granted Dec 20, 2016·24 cites·34 claims
- 3697US9306588B2Switchable secondary playback pathCIRRUS LOGIC INC·Filed 2015·Granted Apr 5, 2016·25 cites·30 claims
- 3797US9094744B1Close talk detector for noise cancellationCIRRUS LOGIC INC·Filed 2012·Granted Jul 28, 2015·38 cites·15 claims
- 3897US9071268B1Multi-path analog front end and analog-to-digital converter for a signal processing systemCIRRUS LOGIC INC·Filed 2014·Granted Jun 30, 2015·36 cites·12 claims
- 3997US9066176B2Systems and methods for adaptive noise cancellation including dynamic bias of coefficients of an adaptive noise cancellation systemCIRRUS LOGIC INC·Filed 2013·Granted Jun 23, 2015·44 cites·39 claims
- 4097US7365669B1Low-delay signal processing based on highly oversampled digital processingCIRRUS LOGIC INC·Filed 2007·Granted Apr 29, 2008·113 cites·25 claims
- 4197US6948098B2Circuits and methods for debugging an embedded processor and systems using the sameCIRRUS LOGIC INC·Filed 2001·Granted Sep 20, 2005·113 cites·18 claims
- 4297US6530060B1Sampled amplitude read channel employing a post processor with a boundary error compensator which compensates for boundary error events in a split-field data sectorCIRRUS LOGIC INC·Filed 2000·Granted Mar 4, 2003·109 cites·22 claims
- 4397US6516443B1Error detection convolution code and post processor for correcting dominant error events of a trellis sequence detector in a sampled amplitude read channel for disk storage systemsCIRRUS LOGIC INC·Filed 2000·Granted Feb 4, 2003·87 cites·25 claims
- 4497US6448911B1Circuits and methods for linearizing capacitor calibration and systems using the sameCIRRUS LOGIC INC·Filed 2001·Granted Sep 10, 2002·113 cites·20 claims
- 4597US5796535ASampled amplitude read channel employing a user data frequency synthesizer and a servo data frequency synthesizerCIRRUS LOGIC INC·Filed 1995·Granted Aug 18, 1998·137 cites·22 claims
- 4697US5600662AError correction method and apparatus for headersCIRRUS LOGIC INC·Filed 1995·Granted Feb 4, 1997·159 cites·23 claims
- 4797US5291499AMethod and apparatus for reduced-complexity viterbi-type sequence detectorsCIRRUS LOGIC INC·Filed 1992·Granted Mar 1, 1994·150 cites·29 claims
- 4896US9774342B1Multi-path analog front end and analog-to-digital converter for a signal processing systemCIRRUS LOGIC INC·Filed 2015·Granted Sep 26, 2017·21 cites·32 claims
- 4996US9596537B2Systems and methods for reduction of audio artifacts in an audio system with dynamic range enhancementCIRRUS LOGIC INC·Filed 2014·Granted Mar 14, 2017·29 cites·36 claims
- 5096US9391576B1Enhancement of dynamic range of audio signal pathCIRRUS LOGIC INC·Filed 2013·Granted Jul 12, 2016·39 cites·43 claims
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