Assignee
TROPIAN INC
US50 patents
Top patents by PatentIndex Score
US7010276B2Mar 7, 2006
Communications signal amplifiers having independent power control and amplitude modulation
TROPIAN INC109 citations99
US6198347B1Mar 6, 2001
Driving circuits for switch mode RF power amplifiers
TROPIAN INC129 citations99
US5952895ASep 14, 1999
Direct digital synthesis of precise, stable angle modulated RF signal
TROPIAN INC224 citations99
US7054385B2May 30, 2006
Reduction of average-to-minimum power ratio in communications signals
TROPIAN INC63 citations98
US6983025B2Jan 3, 2006
High quality power ramping in a communications transmitter
TROPIAN INC64 citations98
US6850736B2Feb 1, 2005
Method and apparatus for reception quality indication in wireless communication
TROPIAN INC102 citations98
US6751265B1Jun 15, 2004
Method and system of amplitude modulation using dual/split channel unequal amplification
TROPIAN INC92 citations98
US6734724B1May 11, 2004
Power control and modulation of switched-mode power amplifiers with one or more stages
TROPIAN INC71 citations98
US6690233B2Feb 10, 2004
Efficient, precise RF modulation using multiple amplifier stages
TROPIAN INC127 citations98
US6636112B1Oct 21, 2003
High-efficiency modulating RF amplifier
TROPIAN INC153 citations98
US6377784B2Apr 23, 2002
High-efficiency modulation RF amplifier
TROPIAN INC188 citations98
US6366177B1Apr 2, 2002
High-efficiency power modulators
TROPIAN INC242 citations98
US6094101AJul 25, 2000
Direct digital frequency synthesis enabling spur elimination
TROPIAN INC90 citations98
US7038536B2May 2, 2006
Power supply processing for power amplifiers
TROPIAN INC68 citations97
US6816016B2Nov 9, 2004
High-efficiency modulating RF amplifier
TROPIAN INC89 citations97
US6781452B2Aug 24, 2004
Power supply processing for power amplifiers
TROPIAN INC71 citations97
US6653896B2Nov 25, 2003
Differential rf/microwave power amplifier using independent synchronized polar modulators
TROPIAN INC76 citations97
US6844776B2Jan 18, 2005
Power control and modulation of switched-mode power amplifiers with one or more stages
TROPIAN INC42 citations96
US6580329B2Jun 17, 2003
PLL bandwidth switching
TROPIAN INC61 citations96
US6528975B2Mar 4, 2003
Saturation prevention and amplifier distortion reduction
TROPIAN INC54 citations96
US6269135B1Jul 31, 2001
Digital phase discriminations based on frequency sampling
TROPIAN INC56 citations96
US6924695B2Aug 2, 2005
Power supply processing for power amplifiers
TROPIAN INC43 citations95
US7026797B2Apr 11, 2006
Extremely high-speed switchmode DC-DC converters
TROPIAN INC41 citations93
US6690215B2Feb 10, 2004
Sigma-delta-based frequency synthesis
TROPIAN INC22 citations93
US6112071AAug 29, 2000
Quadrature-free RF receiver for directly receiving angle modulated signal
TROPIAN INC35 citations93
US7071792B2Jul 4, 2006
Method and apparatus for impedance matching in an amplifier using lumped and distributed inductance
TROPIAN INC19 citations92
US6864668B1Mar 8, 2005
High-efficiency amplifier output level and burst control
TROPIAN INC47 citations92
US6356155B1Mar 12, 2002
Multi-band amplifier having multi-tap RF choke
TROPIAN INC26 citations92
US6219394B1Apr 17, 2001
Digital frequency sampling and discrimination
TROPIAN INC47 citations92
US6215355B1Apr 10, 2001
Constant impedance for switchable amplifier with power control
TROPIAN INC52 citations92
US6140882AOct 31, 2000
Phase lock loop enabling smooth loop bandwidth switching
TROPIAN INC50 citations92
US7042958B2May 9, 2006
Digital time alignment in a polar modulator
TROPIAN INC23 citations90
US6587018B1Jul 1, 2003
Notch filter and method
TROPIAN INC18 citations83
US7042282B2May 9, 2006
Power control and modulation of switched-mode power amplifiers with one or more stages
TROPIAN INC5 citations74
US7035604B2Apr 25, 2006
Communications signal amplifiers having independent power control and amplitude modulation
TROPIAN INC9 citations74
US7027545B2Apr 11, 2006
Data sampler for digital frequency/phase determination
TROPIAN INC6 citations74
US6995613B2Feb 7, 2006
Power distribution and biasing in RF switch-mode power amplifiers
TROPIAN INC4 citations74
US6760572B2Jul 6, 2004
Method and apparatus for combining two AC waveforms
TROPIAN INC10 citations74
US6522192B1Feb 18, 2003
Boost doubler circuit
TROPIAN INC11 citations74
US6686806B2Feb 3, 2004
Ring VCO based on RC timing
TROPIAN INC9 citations73
US6650711B1Nov 18, 2003
Quadrature modulation with reduced phase-error distortion
TROPIAN INC7 citations73
US6567491B1May 20, 2003
High efficiency line driver for high crest-factor signals such as DMT/ADSL signals
TROPIAN INC7 citations73
US6724830B2Apr 20, 2004
High efficiency line driver for high crest-factor signals such as DMT/ADSL signals
TROPIAN INC7 citations72
US7012984B2Mar 14, 2006
PLL noise smoothing using dual-modulus interleaving
TROPIAN INC2 citations63
US7020230B2Mar 28, 2006
Frequency synthesizer for dual mode receiver
TROPIAN INC3 citations61
US6867574B2Mar 15, 2005
Switch mode power supply and driving method for efficient RF amplification
TROPIAN INC6 citations58
US6969984B2Nov 29, 2005
Direct phase and frequency demodulation
TROPIAN INC0 citations52
US6724177B2Apr 20, 2004
Method and apparatus for accurate measurement of communications signals
TROPIAN INC1 citations52
US6624695B2Sep 23, 2003
Waveform pershaping for efficiency improvements in DC to RF conversion
TROPIAN INC1 citations46
US6462627B1Oct 8, 2002
Oscillator circuit having reduced phase noise
TROPIAN INC0 citations46