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.
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