Inventor · disambiguated record
Rajagopalan Rangarajan
Also filed as: RANGARAJAN RAJAGOPALAN
33 granted patents·7 pending applications·160 citations·filing 2008–2024
96Inventor score
Top patents by PatentIndex Score
40 records- 0194US8058934B2Apparatus and method for frequency generationRANGARAJAN RAJAGOPALAN·Filed 2009·Granted Nov 15, 2011·26 cites·43 claims
- 0293US10153934B1Reconfigurable wideband current-mode filtersQUALCOMM INC·Filed 2017·Granted Dec 11, 2018·12 cites·30 claims
- 0393US8044739B2Capacitor switching circuitQUALCOMM INC·Filed 2009·Granted Oct 25, 2011·25 cites·35 claims
- 0492US11025260B1Phase-locked loop (PLL) with multiple error determinersQUALCOMM INC·Filed 2020·Granted Jun 1, 2021·5 cites·20 claims
- 0588US11632098B2Polyphase filter with interphase couplingQUALCOMM INC·Filed 2021·Granted Apr 18, 2023·2 cites·30 claims
- 0687US8415991B2RF buffer circuit with dynamic biasingRANGARAJAN RAJAGOPALAN·Filed 2012·Granted Apr 9, 2013·8 cites·100 claims
- 0786US9473336B2Radio frequency (RF) front end having multiple low noise amplifier modulesQUALCOMM INC·Filed 2015·Granted Oct 18, 2016·6 cites·20 claims
- 0885US9774485B2Multiplex modules for carrier aggregation receiversQUALCOMM INC·Filed 2015·Granted Sep 26, 2017·5 cites·18 claims
- 0985US9712226B2Multi-way diversity receiver with multiple synthesizers in a carrier aggregation transceiverQUALCOMM INC·Filed 2015·Granted Jul 18, 2017·5 cites·30 claims
- 1084US8629700B2Capacitive multiplication in a phase locked loopFENG YUNFEI·Filed 2012·Granted Jan 14, 2014·10 cites·16 claims
- 1183US9184707B2Amplifier with switchable common gate gain bufferQUALCOMM INC·Filed 2013·Granted Nov 10, 2015·9 cites·12 claims
- 1283US7675370B2Dynamic calibration techniques for digitally controlled oscillatorQUALCOMM INC·Filed 2008·Granted Mar 9, 2010·12 cites·44 claims
- 1380US8810322B2Apparatus and method for frequency generationRANGARAJAN RAJAGOPALAN·Filed 2011·Granted Aug 19, 2014·4 cites·22 claims
- 1479US11398853B2Transformer-based antenna switching networkQUALCOMM INC·Filed 2019·Granted Jul 26, 2022·3 cites·35 claims
- 1575US8242854B2Enhancing device reliability for voltage controlled oscillator (VCO) buffers under high voltage swing conditionsMISHRA CHINMAYA·Filed 2010·Granted Aug 14, 2012·5 cites·38 claims
- 1674US9525503B2Reconfigurable multi-mode transceiverQUALCOMM INC·Filed 2014·Granted Dec 20, 2016·3 cites·18 claims
- 1773US2024430031A1Jammer detection systemQUALCOMM INC·Filed 2024·Application pending·0 cites
- 1872US11290058B2System and method for reducing current noise in a VCO and bufferQUALCOMM INC·Filed 2020·Granted Mar 29, 2022·1 cites·22 claims
- 1972US8749316B2Programmable varactor and methods of operation thereofRANGARAJAN RAJAGOPALAN·Filed 2010·Granted Jun 10, 2014·3 cites·11 claims
- 2071US2022207428A1Signal combinerQUALCOMM INC·Filed 2022·Application pending·0 cites
- 2170US11283409B2Signal combinerQUALCOMM INC·Filed 2019·Granted Mar 22, 2022·1 cites·49 claims
- 2270US9681447B2Dynamic local oscillator (LO) scheme and switchable receive (RX) chain for carrier aggregationQUALCOMM INC·Filed 2015·Granted Jun 13, 2017·2 cites·28 claims
- 2368US10439593B2Multi-band filter architecturesQUALCOMM INC·Filed 2017·Granted Oct 8, 2019·1 cites·25 claims
- 2465US8018293B2Configurable wide tuning range oscillator coreQUALCOMM INC·Filed 2009·Granted Sep 13, 2011·4 cites·27 claims
- 2564US9615369B2Avoiding spurious responses with reconfigurable LO dividersQUALCOMM INC·Filed 2015·Granted Apr 4, 2017·1 cites·26 claims
- 2664US8212619B2Split-biased current scalable bufferHAN YIPING·Filed 2009·Granted Jul 3, 2012·5 cites·26 claims
- 2762US12107673B2Jammer detection systemQUALCOMM INC·Filed 2021·Granted Oct 1, 2024·0 cites·29 claims
- 2861US12107646B2Techniques for managing low or variable phase shift resolutions in beam-based communicationsQUALCOMM INC·Filed 2022·Granted Oct 1, 2024·0 cites·27 claims
- 2961US10848100B2System and method for reducing current noise in a VCO and bufferQUALCOMM INC·Filed 2018·Granted Nov 24, 2020·1 cites·24 claims
- 3061US9529380B1Local oscillator signal generation circuit with harmonic current rejectionQUALCOMM INC·Filed 2015·Granted Dec 27, 2016·1 cites·27 claims
- 3155US2024429906A1Shared phase shifter radio architectureQUALCOMM INC·Filed 2023·Application pending·0 cites
- 3255US2025030442A1Variable low intermediate frequency (vlif) radio architectureQUALCOMM INC·Filed 2023·Application pending·0 cites
- 3354US10250314B2Multi-way diversity receiver with multiple synthesizers in a carrier aggregation transceiverQUALCOMM INC·Filed 2017·Granted Apr 2, 2019·0 cites·30 claims
- 3453US10990117B2P-type metal-oxide-semiconductor (PMOS) low drop-out (LDO) regulatorQUALCOMM INC·Filed 2019·Granted Apr 27, 2021·0 cites·24 claims
- 3552US10439858B2Multiplex modules for carrier aggregation receiversQUALCOMM INC·Filed 2017·Granted Oct 8, 2019·0 cites·18 claims
- 3649US10664001B2RF square-law circuitQUALCOMM INC·Filed 2019·Granted May 26, 2020·0 cites·20 claims
- 3745US9379749B2VCO-coupling mitigation in a multiple-carrier, carrier aggregation receiverQUALCOMM INC·Filed 2015·Granted Jun 28, 2016·0 cites·20 claims
- 3843US2015092683A1Dynamic secondary cell (scell) allocation and frequency planning for carrier aggregationQUALCOMM INC·Filed 2014·Application pending·0 cites
- 3939US2016079985A1Quadrature local oscillator phase synthesis and architecture for divide-by-odd-number frequency dividersQUALCOMM INC·Filed 2014·Application pending·0 cites
- 4036US2015056940A1Harmonic trap for common gate amplifierQUALCOMM INC·Filed 2013·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →