Inventor
RANGARAJAN RAJAGOPALAN
US35 patents
⚠️ This page may combine multiple inventors who share the name “RANGARAJAN RAJAGOPALAN”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
QUALCOMM INC
28 patentsUS8044739B2Oct 25, 2011
Capacitor switching circuit
QUALCOMM INC25 citations92
US9712226B2Jul 18, 2017
Multi-way diversity receiver with multiple synthesizers in a carrier aggregation transceiver
QUALCOMM INC5 citations84
US7675370B2Mar 9, 2010
Dynamic calibration techniques for digitally controlled oscillator
QUALCOMM INC12 citations84
US10153934B1Dec 11, 2018
Reconfigurable wideband current-mode filters
QUALCOMM INC12 citations83
US9184707B2Nov 10, 2015
Amplifier with switchable common gate gain buffer
QUALCOMM INC9 citations82
US9774485B2Sep 26, 2017
Multiplex modules for carrier aggregation receivers
QUALCOMM INC5 citations73
US9681447B2Jun 13, 2017
Dynamic local oscillator (LO) scheme and switchable receive (RX) chain for carrier aggregation
QUALCOMM INC2 citations73
US9525503B2Dec 20, 2016
Reconfigurable multi-mode transceiver
QUALCOMM INC3 citations73
US9473336B2Oct 18, 2016
Radio frequency (RF) front end having multiple low noise amplifier modules
QUALCOMM INC6 citations73
US11632098B2Apr 18, 2023
Polyphase filter with interphase coupling
QUALCOMM INC2 citations72
US11025260B1Jun 1, 2021
Phase-locked loop (PLL) with multiple error determiners
QUALCOMM INC5 citations72
US11398853B2Jul 26, 2022
Transformer-based antenna switching network
QUALCOMM INC3 citations71
US11283409B2Mar 22, 2022
Signal combiner
QUALCOMM INC1 citations62
US10439593B2Oct 8, 2019
Multi-band filter architectures
QUALCOMM INC1 citations62
US8018293B2Sep 13, 2011
Configurable wide tuning range oscillator core
QUALCOMM INC4 citations62
US12549216B2Feb 10, 2026
Transmit (TX) local oscillator (LO) leakage calibration
QUALCOMM INC0 citations61
US10990117B2Apr 27, 2021
P-type metal-oxide-semiconductor (PMOS) low drop-out (LDO) regulator
QUALCOMM INC0 citations61
US11290058B2Mar 29, 2022
System and method for reducing current noise in a VCO and buffer
QUALCOMM INC1 citations58
US10848100B2Nov 24, 2020
System and method for reducing current noise in a VCO and buffer
QUALCOMM INC1 citations58
US10439858B2Oct 8, 2019
Multiplex modules for carrier aggregation receivers
QUALCOMM INC0 citations52
US10250314B2Apr 2, 2019
Multi-way diversity receiver with multiple synthesizers in a carrier aggregation transceiver
QUALCOMM INC0 citations52
US9615369B2Apr 4, 2017
Avoiding spurious responses with reconfigurable LO dividers
QUALCOMM INC1 citations52
US9379749B2Jun 28, 2016
VCO-coupling mitigation in a multiple-carrier, carrier aggregation receiver
QUALCOMM INC0 citations52
US12107646B2Oct 1, 2024
Techniques for managing low or variable phase shift resolutions in beam-based communications
QUALCOMM INC0 citations51
US9529380B1Dec 27, 2016
Local oscillator signal generation circuit with harmonic current rejection
QUALCOMM INC1 citations51
US12562765B2Feb 24, 2026
Spur suppression for millimeter wave (mmW) receiver
QUALCOMM INC0 citations50
US10664001B2May 26, 2020
RF square-law circuit
QUALCOMM INC0 citations50
US12107673B2Oct 1, 2024
Jammer detection system
QUALCOMM INC0 citations48
RANGARAJAN RAJAGOPALAN
4 patentsUS8058934B2Nov 15, 2011
Apparatus and method for frequency generation
RANGARAJAN RAJAGOPALAN26 citations90
US8415991B2Apr 9, 2013
RF buffer circuit with dynamic biasing
RANGARAJAN RAJAGOPALAN8 citations83
US8810322B2Aug 19, 2014
Apparatus and method for frequency generation
RANGARAJAN RAJAGOPALAN4 citations71
US8749316B2Jun 10, 2014
Programmable varactor and methods of operation thereof
RANGARAJAN RAJAGOPALAN3 citations61