Inventor
KOSUGI HIROAKI
JP57 patents
Patents
50 patentsUS5369789ANov 29, 1994
Burst signal transmitter
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD169 citations99
US6175746B1Jan 16, 2001
Multiband mobile unit communication apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD86 citations97
US5926466AJul 20, 1999
Time division multiple access FDD wireless unit and time division multiple access FDD/TDD dual mode wireless unit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD113 citations97
US6717998B2Apr 6, 2004
Frequency synthesizer apparatus equipped with fraction part control circuit, communication apparatus, frequency modulator apparatus, and frequency modulating method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD53 citations96
US6326845B1Dec 4, 2001
Feedforward amplifier
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD63 citations96
US6201439B1Mar 13, 2001
Power splitter/ combiner circuit, high power amplifier and balun circuit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD44 citations96
US6081694AJun 27, 2000
Mobile telephone transmitter with internal auxiliary matching circuit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD61 citations96
US5966666AOct 12, 1999
Multiple-band mobile transceiver having a smaller number of local oscillators
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD84 citations96
US5852784ADec 22, 1998
Multiband mobile unit communication apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD57 citations96
US4700194AOct 13, 1987
Small antenna
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD63 citations96
US5973557AOct 26, 1999
High efficiency linear power amplifier of plural frequency bands and high efficiency power amplifier
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD86 citations95
US5770970AJun 23, 1998
Transmitter of wireless system and high frequency power amplifier used therein
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD45 citations95
US5594394AJan 14, 1997
Antenna diversity switching device with switching circuits between the receiver terminal and each antenna
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD56 citations94
US7050525B2May 23, 2006
Frequency synthesizer apparatus equipped with fraction part control circuit, communication apparatus, frequency modulator apparatus, and frequency modulating method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD25 citations93
US6825811B2Nov 30, 2004
Display-antenna integral structure and communication apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD26 citations93
US5559474ASep 24, 1996
Frequency synthesizer with controllable loop filter
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD52 citations93
US5272452ADec 21, 1993
PLL frequency synthesizer with variable bandwidth loop filter
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD33 citations93
US6803837B2Oct 12, 2004
Power splitter/combiner circuit, high power amplifier and balun circuit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations92
US6441692B1Aug 27, 2002
PLL frequency synthesizer
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD33 citations92
US6269253B1Jul 31, 2001
Multi-mode wireless communication system
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD44 citations92
US6169461B1Jan 2, 2001
High-frequency oscillating circuit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD26 citations92
US6114911ASep 5, 2000
Power amplifier
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD49 citations92
US6006080ADec 21, 1999
Receiving mixer circuit for mobile radio transceiver designed to operate with multiple modulation modes and multiple frequency bands
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD23 citations92
US5694089ADec 2, 1997
Fast frequency switching synthesizer
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD32 citations92
US5442812AAug 15, 1995
Antenna switching apparatus for selectively connecting antenna to transmitter or receiver
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD39 citations92
US5371477ADec 6, 1994
Linear amplifier
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD24 citations92
US5274388ADec 28, 1993
Antenna device
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD27 citations92
US6094564AJul 25, 2000
Mobile communication apparatus operable in different formats and pairing I-F band pass filter type with I-F amplifier characteristics
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD22 citations91
US6054900AApr 25, 2000
Power amplifier MMIC and mobile communication terminal
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD40 citations91
US5815036ASep 29, 1998
Apparatus and method for controlling feedforward amplifier
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD45 citations91
US5852384ADec 22, 1998
Dual band oscillator circuit using strip line resonators
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD52 citations90
US6130897AOct 10, 2000
Time division multiple access FDD/TDD dual mode radio and a time division multiple access TDD dual band system
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD38 citations89
US5691668ANov 25, 1997
Feedforward amplifier
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD42 citations89
US7110486B2Sep 19, 2006
Frequency synthesizer apparatus equipped with fraction part control circuit, communication apparatus, frequency modulator apparatus, and frequency modulating method
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations84
US6590906B1Jul 8, 2003
Multi-carrier transmitter circuit and communication equipment
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations84
US6459915B2Oct 1, 2002
External adapter for a portable cellular phone
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations84
US6329875B1Dec 11, 2001
Power amplifier, power control method for power amplifier, and communication equipment
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD17 citations84
US5872487AFeb 16, 1999
Fast frequency switching synthesizer
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD20 citations84
US7038557B2May 2, 2006
Antenna duplexer and mobile communication device using the same
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD18 citations83
US5987309ANov 16, 1999
Transceiver circuits for TDMA system with variable frequency second local oscillator
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations83
US6421530B1Jul 16, 2002
Radio circuit having a local oscillator frequency which differs from the transmit frequency or the receive frequency and mobile radio apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD17 citations82
US5901345AMay 4, 1999
Transmitter of wireless system and high frequency power amplifier used therein
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD16 citations81
US6259895B1Jul 10, 2001
Receiver and transmitter-receiver
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations74
US6032032AFeb 29, 2000
Mobile radio communication apparatus
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD15 citations74
US5319804AJun 7, 1994
Transmitter with nonlinearity correction circuits
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD19 citations74
US5276921AJan 4, 1994
Transmitter with nonlinearity correction circuit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD12 citations74
US6690249B2Feb 10, 2004
Power splitter/combiner multi-layer circuit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD4 citations73
US6563395B2May 13, 2003
Power splitter/combiner circuit, high power amplifier and balun circuit
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD5 citations73
US6300848B1Oct 9, 2001
Power splitter and power combiner using N-branch-line-shaped directional couplers
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD14 citations73
US6037837AMar 14, 2000
Feed forward amplifier
MATSUSHITA ELECTRIC INDUSTRIAL CO LTD13 citations73
Showing the top 50 of 57 patents by PatentIndex Score.