Inventor
YOSHIDA YASUHARU
JP33 patents
⚠️ This page may combine multiple inventors who share the name “YOSHIDA YASUHARU”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
NEC CORP
24 patentsUS4751478AJun 14, 1988
Multilevel modulator capable of producing a composite modulated signal comprising a quadrature amplitude modulated component and a phase modulated component
NEC CORP71 citations96
US6285858B1Sep 4, 2001
Electronic toll collection system and method featuring antenna arrangement
NEC CORP50 citations92
US5134634AJul 28, 1992
Multilevel quadrature amplitude demodulator capable of compensating for a quadrature phase deviation of a carrier signal pair
NEC CORP33 citations92
US4965536AOct 23, 1990
Quadrature amplitude modulation system using digital filters
NEC CORP29 citations92
US4875049AOct 17, 1989
Automatic level control circuit for an ad convertor
NEC CORP39 citations92
US4823363AApr 18, 1989
Phase-locked clock regeneration circuit for digital transmission systems
NEC CORP27 citations92
US7099625B1Aug 29, 2006
Automobile communications method and system
NEC CORP11 citations84
US4574246AMar 4, 1986
Demodulator with AGC circuit for multi-level quadrature amplitude-modulated carrier wave
NEC CORP21 citations82
US4553102ANov 12, 1985
Multilevel amplitude modulation demodulator with DC drift compensation
NEC CORP21 citations82
US6269302B1Jul 31, 2001
Simple mobile object position detecting system
NEC CORP10 citations74
US4975927ADec 4, 1990
Demodulator with composite transversal equalizer and eye detection clock synchronizer
NEC CORP19 citations74
US4823361AApr 18, 1989
Interference immune digital modulation receiver
NEC CORP12 citations74
US4721928AJan 26, 1988
Multilevel modulator capable of producing a multilevel quadrature amplitude modulated signal having (2n +α) output signal points
NEC CORP11 citations74
US4703282AOct 27, 1987
Digital demodulation system
NEC CORP11 citations74
US4549142AOct 22, 1985
Phase demodulator including variable phase shifter for controlling reference carrier
NEC CORP7 citations74
US4528512AJul 9, 1985
Timing synchronizing circuit for demodulators
NEC CORP7 citations74
US4757266AJul 12, 1988
Demodulation system capable of establishing synchronization in a transient state
NEC CORP7 citations73
US4799240AJan 17, 1989
Clock synchronizing circuit including a voltage controlled oscillator
NEC CORP4 citations63
US4755763AJul 5, 1988
Demodulator capable of avoiding abnormal demodulation
NEC CORP3 citations63
US4750191AJun 7, 1988
D/A converter capable of producing an analog signal having levels of a preselected number different from 2N and communication network comprising the D/A converter
NEC CORP3 citations63
US4544894AOct 1, 1985
DC Voltage control circuits
NEC CORP4 citations63
US4498050AFeb 5, 1985
Demodulation device for composite PSK-PSK modulated waves
NEC CORP3 citations63
US4620159AOct 28, 1986
Demodulator for multiphase PSK or multilevel QAM signals
NEC CORP6 citations62
US4631488ADec 23, 1986
QAM demodulator with distortion compensation
NEC CORP1 citations52
NIPPON ELECTRIC CO
7 patentsUS4255713AMar 10, 1981
Carrier regeneration circuit for polyphase modulation system
NIPPON ELECTRIC CO22 citations82
US4334312AJun 8, 1982
Phase synchronizing circuit for use in multi-level, multi-phase, superposition-modulated signal transmission system
NIPPON ELECTRIC CO15 citations74
US4095187AJun 13, 1978
Demodulation system for a multi-level multi-phase superposition-modulated carrier wave
NIPPON ELECTRIC CO11 citations74
US4109102AAug 22, 1978
Phase synchronizing circuit
NIPPON ELECTRIC CO10 citations73
US4285062AAug 18, 1981
Digital multi-level multi-phase modulation communication system
NIPPON ELECTRIC CO8 citations71
US4501004AFeb 19, 1985
Device for eliminating FM or like interference from a digital microwave signal
NIPPON ELECTRIC CO15 citations70
US4099130AJul 4, 1978
Phase synchronizing circuit
NIPPON ELECTRIC CO4 citations63