Assignee
SIGMATEL INC
US202 patents
Top patents by PatentIndex Score
US7206367B1Apr 17, 2007
Apparatus and method to synchronize multimedia playback over a network using out-of-band signaling
SIGMATEL INC311 citations98
US7164565B2Jan 16, 2007
ESD protection circuit
SIGMATEL INC88 citations96
US5714909AFeb 3, 1998
Transimpedance amplifier and method for constructing same
SIGMATEL INC54 citations96
US7409623B2Aug 5, 2008
System and method of reading non-volatile computer memory
SIGMATEL INC125 citations95
US7043479B2May 9, 2006
Remote-directed management of media content
SIGMATEL INC46 citations95
US6212230B1Apr 3, 2001
Method and apparatus for pulse position modulation
SIGMATEL INC80 citations95
US7143102B2Nov 28, 2006
Autogenerated play lists from search criteria
SIGMATEL INC62 citations93
US7394314B2Jul 1, 2008
Class-D amplifier with noise-immunity feedback
SIGMATEL INC17 citations92
US7362810B2Apr 22, 2008
Post-filter for deblocking and deringing of video data
SIGMATEL INC19 citations92
US7254244B2Aug 7, 2007
Pop and click reduction using DAC power up and power down processing
SIGMATEL INC22 citations92
US7208919B2Apr 24, 2007
Method and apparatus for digitally regulating an output voltage using noise-shaped component selection
SIGMATEL INC23 citations92
US7104684B2Sep 12, 2006
On-chip digital thermometer to sense and measure device temperatures
SIGMATEL INC19 citations92
US7075280B2Jul 11, 2006
Pulse-skipping PFM DC-DC converter using a voltage mode control loop
SIGMATEL INC36 citations92
US6998871B2Feb 14, 2006
Configurable integrated circuit for use in a multi-function handheld device
SIGMATEL INC27 citations92
US6977447B2Dec 20, 2005
Method and apparatus for regulating multiple outputs of a single inductor DC to DC converter
SIGMATEL INC31 citations92
US6859156B2Feb 22, 2005
Variable bandgap reference and applications thereof
SIGMATEL INC16 citations92
US6819677B1Nov 16, 2004
Method and apparatus for recovering data that was transported utilizing multiple data transport protocols
SIGMATEL INC101 citations92
US6654900B1Nov 25, 2003
Method and apparatus for producing multiple clock signals having controlled duty cycles by controlling clock multiplier delay elements
SIGMATEL INC28 citations92
US6526111B1Feb 25, 2003
Method and apparatus for phase locked loop having reduced jitter and/or frequency biasing
SIGMATEL INC50 citations92
US6507223B2Jan 14, 2003
Differential line driver having adjustable common mode operation
SIGMATEL INC28 citations92
US6404172B1Jun 11, 2002
Method and apparatus for providing integrated buck or boost conversion
SIGMATEL INC29 citations92
US6366522B1Apr 2, 2002
Method and apparatus for controlling power consumption of an integrated circuit
SIGMATEL INC26 citations92
US6151149ANov 21, 2000
Method and apparatus for pulse pattern modulation
SIGMATEL INC40 citations92
US5977822ANov 2, 1999
Method and apparatus of pulse position demodulation
SIGMATEL INC42 citations92
US7228054B2Jun 5, 2007
Automated playlist generation
SIGMATEL INC51 citations91
US7065417B2Jun 20, 2006
MPEG portable sound reproducing system and a reproducing method thereof
SIGMATEL INC18 citations91
US5566101AOct 15, 1996
Method and apparatus for a finite impulse response filter processor
SIGMATEL INC50 citations91
US5563553AOct 8, 1996
Method and apparatus for a controlled oscillation that may be used in a phase locked loop
SIGMATEL INC97 citations91
US6931139B1Aug 16, 2005
Computer audio system
SIGMATEL INC14 citations90
US6584162B1Jun 24, 2003
Method and apparatus sample rate conversions in an analog to digital converter
SIGMATEL INC43 citations90
US6362755B1Mar 26, 2002
Method and apparatus for sample rate conversion and applicants thereof
SIGMATEL INC40 citations90
US7594087B2Sep 22, 2009
System and method for writing data to and erasing data from non-volatile memory
SIGMATEL INC23 citations89
US5592165AJan 7, 1997
Method and apparatus for an oversampled digital to analog convertor
SIGMATEL INC49 citations89
US7856283B2Dec 21, 2010
Digital microphone interface, audio codec and methods for use therewith
SIGMATEL INC33 citations88
US7146322B2Dec 5, 2006
Interleaving of information into compressed digital audio streams
SIGMATEL INC32 citations88
US6885900B1Apr 26, 2005
Method and apparatus for providing multiple channel audio in a computing system
SIGMATEL INC36 citations88
US7366577B2Apr 29, 2008
Programmable analog input/output integrated circuit system
SIGMATEL INC30 citations87
US6857034B1Feb 15, 2005
Computer peripheral device incorporating infrared transmissions
SIGMATEL INC20 citations86
US6204651B1Mar 20, 2001
Method and apparatus for regulating an output voltage of a switch mode converter
SIGMATEL INC74 citations86
US7821501B2Oct 26, 2010
Touch screen driver and methods for use therewith
SIGMATEL INC16 citations84
US7599451B2Oct 6, 2009
Sample rate conversion module and applications thereof
SIGMATEL INC10 citations84
US7583216B2Sep 1, 2009
Adjustable DAC and applications thereof
SIGMATEL INC8 citations84
US7515078B2Apr 7, 2009
Programmable sample rate analog to digital converter and method for use therewith
SIGMATEL INC8 citations84
US7402981B2Jul 22, 2008
Method and apparatus to perform battery charging using a DC-DC converter circuit
SIGMATEL INC13 citations84
US7372967B2May 13, 2008
Microphone bias circuit
SIGMATEL INC15 citations84
US7262585B2Aug 28, 2007
Method and apparatus for bi-directional current limit in a dual-power source capable device
SIGMATEL INC19 citations84
US7259480B2Aug 21, 2007
Conserving power of a system on a chip using an alternate power source
SIGMATEL INC10 citations84
US7209069B2Apr 24, 2007
Successive approximation analog-to-digital converter with current steered digital-to-analog converter
SIGMATEL INC17 citations84
US7106241B1Sep 12, 2006
Controlled sampling module and method for use therewith
SIGMATEL INC13 citations84
US6778119B2Aug 17, 2004
Method and apparatus for accurate digital-to-analog conversion
SIGMATEL INC14 citations84
Showing the top 50 of 202 patents by PatentIndex Score.