Assignee
SYSTEM GENERAL CORP
TW·230 granted patents·25 pending applications·6,708 citations·filing 1987–2015
Top patents by PatentIndex Score
255 records- 0198US7016204B2Close-loop PWM controller for primary-side controlled power convertersSYSTEM GENERAL CORP·Filed 2004·Granted Mar 21, 2006·188 cites·18 claims
- 0298US6977824B1Control circuit for controlling output current at the primary side of a power converterSYSTEM GENERAL CORP·Filed 2004·Granted Dec 20, 2005·220 cites·15 claims
- 0398US6853563B1Primary-side controlled flyback power converterSYSTEM GENERAL CORP·Filed 2003·Granted Feb 8, 2005·194 cites·16 claims
- 0498US6839247B1PFC-PWM controller having a power saving meansSYSTEM GENERAL CORP·Filed 2003·Granted Jan 4, 2005·246 cites·12 claims
- 0598US6768655B1Discontinuous mode PFC controller having a power saving modulator and operation method thereofSYSTEM GENERAL CORP·Filed 2003·Granted Jul 27, 2004·190 cites·13 claims
- 0697US7352595B2Primary-side controlled switching regulatorSYSTEM GENERAL CORP·Filed 2005·Granted Apr 1, 2008·81 cites·27 claims
- 0797US7286123B2LED driver circuit having temperature compensationSYSTEM GENERAL CORP·Filed 2005·Granted Oct 23, 2007·43 cites·15 claims
- 0897US7173835B1Control circuit associated with saturable inductor operated as synchronous rectifier forward power converterSYSTEM GENERAL CORP·Filed 2005·Granted Feb 6, 2007·87 cites·18 claims
- 0997US7149098B1Over-power protection apparatus with programmable over-current thresholdSYSTEM GENERAL CORP·Filed 2006·Granted Dec 12, 2006·120 cites·11 claims
- 1097US7116090B1Switching control circuit for discontinuous mode PFC convertersSYSTEM GENERAL CORP·Filed 2005·Granted Oct 3, 2006·95 cites·12 claims
- 1197US6765374B1Low drop-out regulator and an pole-zero cancellation method for the sameSYSTEM GENERAL CORP·Filed 2003·Granted Jul 20, 2004·134 cites·15 claims
- 1296US7362593B2Switching control circuit having off-time modulation to improve efficiency of primary-side controlled power supplySYSTEM GENERAL CORP·Filed 2004·Granted Apr 22, 2008·138 cites·11 claims
- 1396US7313004B1Switching controller for resonant power converterSYSTEM GENERAL CORP·Filed 2006·Granted Dec 25, 2007·104 cites·22 claims
- 1496US7310251B2Control circuit having two-level under voltage lockout threshold to improve the protection of power supplySYSTEM GENERAL CORP·Filed 2006·Granted Dec 18, 2007·41 cites·13 claims
- 1596US6836415B1Primary-side regulated pulse width modulation controller with improved load regulationSYSTEM GENERAL CORP·Filed 2003·Granted Dec 28, 2004·115 cites·15 claims
- 1696US6836173B1High-side transistor driver for power convertersSYSTEM GENERAL CORP·Filed 2003·Granted Dec 28, 2004·72 cites·11 claims
- 1796US6781422B1Capacitive high-side switch driver for a power converterSYSTEM GENERAL CORP·Filed 2003·Granted Aug 24, 2004·72 cites·13 claims
- 1895US7486528B2Linear-predict sampling for measuring demagnetized voltage of transformerSYSTEM GENERAL CORP·Filed 2006·Granted Feb 3, 2009·59 cites·15 claims
- 1995US7414865B2Controller having output current control for a power converterSYSTEM GENERAL CORP·Filed 2005·Granted Aug 19, 2008·58 cites·10 claims
- 2095US7362592B2Switching control circuit for primary-side controlled power convertersSYSTEM GENERAL CORP·Filed 2004·Granted Apr 22, 2008·126 cites·17 claims
- 2195US7286376B2Soft-switching power converter having power saving circuit for light load operationsSYSTEM GENERAL CORP·Filed 2005·Granted Oct 23, 2007·62 cites·10 claims
- 2295US7245089B2Switching LED driverSYSTEM GENERAL CORP·Filed 2005·Granted Jul 17, 2007·42 cites·10 claims
- 2395US7061780B2Switching control circuit with variable switching frequency for primary-side-controlled power convertersSYSTEM GENERAL CORP·Filed 2004·Granted Jun 13, 2006·137 cites·15 claims
- 2495US6903536B2PFC-PWM controller having interleaved switchingSYSTEM GENERAL CORP·Filed 2003·Granted Jun 7, 2005·116 cites·14 claims
- 2595US6862194B2Flyback power converter having a constant voltage and a constant current output under primary-side PWM controlSYSTEM GENERAL CORP·Filed 2003·Granted Mar 1, 2005·117 cites·22 claims
- 2695US6721192B1PWM controller regulating output voltage and output current in primary sideSYSTEM GENERAL CORP·Filed 2003·Granted Apr 13, 2004·146 cites·4 claims
- 2795US6661679B1PWM controller having adaptive off-time modulation for power savingSYSTEM GENERAL CORP·Filed 2002·Granted Dec 9, 2003·122 cites·4 claims
- 2894US7787264B2Apparatus to provide synchronous rectifying circuit for flyback power convertersSYSTEM GENERAL CORP·Filed 2007·Granted Aug 31, 2010·40 cites·11 claims
- 2994US7531996B2Low dropout regulator with wide input voltage rangeSYSTEM GENERAL CORP·Filed 2006·Granted May 12, 2009·49 cites·9 claims
- 3094US7259972B2Primary-side-control power converter having a switching controller using frequency hopping and voltage and current control loopsSYSTEM GENERAL CORP·Filed 2004·Granted Aug 21, 2007·97 cites·51 claims
- 3194US7133300B1Over-voltage protection circuit for power converterSYSTEM GENERAL CORP·Filed 2005·Granted Nov 7, 2006·50 cites·8 claims
- 3294US7061225B2Apparatus and method thereof for measuring output current from primary side of power converterSYSTEM GENERAL CORP·Filed 2004·Granted Jun 13, 2006·100 cites·20 claims
- 3394US6185082B1Protection circuit for a boost power converterSYSTEM GENERAL CORP·Filed 1999·Granted Feb 6, 2001·141 cites·7 claims
- 3494US5903452AAdaptive slope compensator for current mode power convertersSYSTEM GENERAL CORP·Filed 1997·Granted May 11, 1999·136 cites·5 claims
- 3593US7440298B2Synchronous rectification circuit for power convertersSYSTEM GENERAL CORP·Filed 2006·Granted Oct 21, 2008·27 cites·11 claims
- 3693US7310244B2Primary side controlled switching regulatorSYSTEM GENERAL CORP·Filed 2006·Granted Dec 18, 2007·80 cites·11 claims
- 3793US7259525B2High efficiency switching LED driverSYSTEM GENERAL CORP·Filed 2005·Granted Aug 21, 2007·30 cites·16 claims
- 3893US7054170B2Power-mode controlled power converterSYSTEM GENERAL CORP·Filed 2004·Granted May 30, 2006·90 cites·14 claims
- 3993US6906934B2Integrated start-up circuit with reduced power consumptionSYSTEM GENERAL CORP·Filed 2003·Granted Jun 14, 2005·88 cites·6 claims
- 4092US7940035B2Control circuit having an impedance modulation controlling power converter for saving powerSYSTEM GENERAL CORP·Filed 2007·Granted May 10, 2011·35 cites·11 claims
- 4192USRE40656EPrimary-side controlled flyback power converterSYSTEM GENERAL CORP·Filed 2006·Granted Mar 10, 2009·35 cites·30 claims
- 4292US7426120B2Switching control circuit having a valley voltage detector to achieve soft switching for a resonant power converterSYSTEM GENERAL CORP·Filed 2005·Granted Sep 16, 2008·33 cites·14 claims
- 4392US7026851B2PWM controller having frequency jitter for power suppliesSYSTEM GENERAL CORP·Filed 2004·Granted Apr 11, 2006·50 cites·17 claims
- 4492US6952354B1Single stage PFC power converterSYSTEM GENERAL CORP·Filed 2004·Granted Oct 4, 2005·45 cites·8 claims
- 4592US6903421B1Isolated high-voltage LDMOS transistor having a split well structureSYSTEM GENERAL CORP·Filed 2004·Granted Jun 7, 2005·69 cites·8 claims
- 4692US6674656B1PWM controller having a saw-limiter for output power limit without sensing input voltageSYSTEM GENERAL CORP·Filed 2002·Granted Jan 6, 2004·79 cites·3 claims
- 4792US6611439B1PWM controller for controlling output power limit of a power supplySYSTEM GENERAL CORP·Filed 2002·Granted Aug 26, 2003·107 cites·3 claims
- 4892US6545882B2PWM controller having off-time modulation for power converterSYSTEM GENERAL CORP·Filed 2001·Granted Apr 8, 2003·83 cites·6 claims
- 4992US6262549B1Fan speed pulse filter for a PWM fanSYSTEM GENERAL CORP·Filed 2000·Granted Jul 17, 2001·47 cites·4 claims
- 5091US7778051B2Output current control circuit for power converter with a changeable switching frequencySYSTEM GENERAL CORP·Filed 2007·Granted Aug 17, 2010·35 cites·10 claims
Showing the top 50 of 255 patent records by PatentIndex Score.
Counts cover granted patents and pending applications in the PatentIndex corpus. How scoring works →