Patents by Inventor Kazuji Sasaki
Kazuji Sasaki has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 11953491Abstract: A detection device that is capable of being attached to a through hole includes a main body portion, a detection portion, a cover portion, an insulation portion, and an oscillation portion. The main body portion has an insertion portion and a head portion. The detection portion is arranged in the insertion portion and detects the state of a fluid. The cover portion is arranged so as to form a gap with the head portion. The insulating portion has a lateral wall having a cylindrical shape. An oscillation portion is accommodated inside the insulation portion, and performs a wireless output of a detection result of the detection portion by using the head portion, the cover portion and the gap as a slot antenna.Type: GrantFiled: October 8, 2019Date of Patent: April 9, 2024Assignee: KELK Ltd.Inventors: Kazuji Sasaki, Tomonori Murata, Daisuke Goto
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Publication number: 20210382031Abstract: A detection device that is capable of being attached to a through hole includes a main body portion, a detection portion, a cover portion, an insulation portion, and an oscillation portion. The main body portion has an insertion portion and a head portion. The detection portion is arranged in the insertion portion and detects the state of a fluid. The cover portion is arranged so as to form a gap with the head portion. The insulating portion has a lateral wall having a cylindrical shape. An oscillation portion is accommodated inside the insulation portion, and performs a wireless output of a detection result of the detection portion by using the head portion, the cover portion and the gap as a slot antenna.Type: ApplicationFiled: October 8, 2019Publication date: December 9, 2021Applicant: KELK Ltd.Inventors: Kazuji Sasaki, Tomonori Murata, Daisuke Goto
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Patent number: 8390143Abstract: Disclosed herein is a communication system including: at least one power line communication apparatus connected via a general power line for supplying a commercial alternate current power; a communication terminal having a modem for power line communication, and a plurality of first coils having different directivities; and a coupling apparatus, connected to a power line, having a filter for attenuating an alternate current component of the power line, and a second coil arranged after the filter; wherein the communication terminal executes mutual communication with any of the power line communication apparatus connected via the general power line through proximity communication based on an electromagnetic coupling action that is generated between the plurality of first coils and the second coil when the communication terminal is brought to the proximity of a coupling surface of the coupling apparatus.Type: GrantFiled: December 1, 2011Date of Patent: March 5, 2013Assignee: Sony CorporationInventors: Kazuji Sasaki, Takehiro Sugita, Kunio Fukuda
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Publication number: 20120076186Abstract: Disclosed herein is a communication system including: at least one power line communication apparatus connected via a general power line for supplying a commercial alternate current power; a communication terminal having a modem for power line communication, and a plurality of first coils having different directivities; and a coupling apparatus, connected to a power line, having a filter for attenuating an alternate current component of the power line, and a second coil arranged after the filter; wherein the communication terminal executes mutual communication with any of the power line communication apparatus connected via the general power line through proximity communication based on an electromagnetic coupling action that is generated between the plurality of first coils and the second coil when the communication terminal is brought to the proximity of a coupling surface of the coupling apparatus.Type: ApplicationFiled: December 1, 2011Publication date: March 29, 2012Applicant: SONY CORPORATIONInventors: Kazuji SASAKI, Takehiro SUGITA, Kunio FUKUDA
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Patent number: 8089176Abstract: Disclosed herein is a communication system including: at least one power line communication apparatus connected via a general power line for supplying a commercial alternate current power; a communication terminal having a modem for power line communication, and a plurality of first coils having different directivities; and a coupling apparatus, connected to a power line, having a filter for attenuating an alternate current component of the power line, and a second coil arranged after the filter; wherein the communication terminal executes mutual communication with any of the power line communication apparatus connected via the general power line through proximity communication based on an electromagnetic coupling action that is generated between the plurality of first coils and the second coil when the communication terminal is brought to the proximity of a coupling surface of the coupling apparatus.Type: GrantFiled: December 11, 2008Date of Patent: January 3, 2012Assignee: Sony CorporationInventors: Kazuji Sasaki, Takehiro Sugita, Kunio Fukuda
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Patent number: 7903760Abstract: A mixer circuit accumulates I signal (digital signal of first channel) having its band limited by low-pass filter and first carrier signal to perform two-phase shift keying modulation thereon. An adder adds fundamental-wave component of bit clock signal BCK into Q signal (digital signal of second channel) having its band limited by the another low-pass filter to obtain a resultant added-up signal. Another mixer circuit accumulates the added-up signal and second carrier signal to perform two-phase shift keying modulation thereon. Output signals of the mixer circuits are input to another adder so that they may be added up to obtain a QPSK signal as a modulated quadrature signal. The QPSK signal contains frequency signals whose frequencies are a sum of bit clock frequency and carrier frequency and a difference between them. When demodulating, the carrier signal and the bit clock signal are reproduced using the frequency signals.Type: GrantFiled: October 8, 2004Date of Patent: March 8, 2011Assignee: Sony CorporationInventors: Kazuji Sasaki, Masaya Takano
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Patent number: 7596187Abstract: A mixer circuit accumulates I signal (digital signal of first channel) having its band limited by low-pass filter and first carrier signal to perform two-phase shift keying modulation thereon. An adder adds fundamental-wave component of bit clock signal BCK into Q signal (digital signal of second channel) having its band limited by the another low-pass filter to obtain a resultant added-up signal. Another mixer circuit accumulates the added-up signal and second carrier signal to perform two-phase shift keying modulation thereon. Output signals of the mixer circuits are input to another adder so that they may be added up to obtain a QPSK signal as a modulated quadrature signal. The QPSK signal contains frequency signals whose frequencies are a sum of bit clock frequency and carrier frequency and a difference between them. When demodulating, the carrier signal and the bit clock signal are reproduced using the frequency signals.Type: GrantFiled: February 15, 2008Date of Patent: September 29, 2009Assignee: Sony CorporationInventors: Kazuji Sasaki, Masaya Takano
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Publication number: 20090175321Abstract: Disclosed herein is a communication system including: at least one power line communication apparatus connected via a general power line for supplying a commercial alternate current power; a communication terminal having a modem for power line communication, and a plurality of first coils having different directivities; and a coupling apparatus, connected to a power line, having a filter for attenuating an alternate current component of the power line, and a second coil arranged after the filter; wherein the communication terminal executes mutual communication with any of the power line communication apparatus connected via the general power line through proximity communication based on an electromagnetic coupling action that is generated between the plurality of first coils and the second coil when the communication terminal is brought to the proximity of a coupling surface of the coupling apparatus.Type: ApplicationFiled: December 11, 2008Publication date: July 9, 2009Applicant: Sony CorporationInventors: Kazuji Sasaki, Takehiro Sugita, Kunio Fukuda
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Publication number: 20090143010Abstract: A communication system is disclosed which includes: at least one power line communication device configured to be connected with another power line communication device via a common power line for providing a commercial alternate-current power supply; and a communication terminal configured to include a modem for power line communication and a coil for exchanging power line communication signals with an external entity through electromagnetic coupling, the communication terminal sending and receiving the signals to and from the external entity through electromagnetic coupling between the coil and the power line.Type: ApplicationFiled: November 13, 2008Publication date: June 4, 2009Applicant: SONY CORPORATIONInventors: Kunio Fukuda, Kazuji Sasaki, Takehiro Sugita
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Publication number: 20090143009Abstract: A communication system for carrying out noncontact transmissions of a close-coupled type by adoption of an electrostatic capacitive coupling method, the communication system includes: a signal transmitting apparatus having a signal transmitting electrode and a section configured to apply a baseband signal representing transmitted data to the signal transmitting electrode as a transmitted signal; and a signal receiving apparatus having a signal receiving electrode and a signal demodulation section configured to carry out a binary conversion demodulation process on a received signal appearing at the signal receiving electrode to reproduce the baseband signal, wherein, when the signal transmitting electrode and the signal receiving electrode closely couple to each other, an electrostatic capacitive coupler equivalent to a capacitor coupling circuit is formed and the transmitted signal is propagated through a small capacitance created between the signal transmitting electrode and the signal receiving electrode.Type: ApplicationFiled: November 13, 2008Publication date: June 4, 2009Applicant: SONY CORPORATIONInventor: Kazuji Sasaki
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Publication number: 20080136546Abstract: A mixer circuit accumulates I signal (digital signal of first channel) having its band limited by low-pass filter and first carrier signal to perform two-phase shift keying modulation thereon. An adder adds fundamental-wave component of bit clock signal BCK into Q signal (digital signal of second channel) having its band limited by the another low-pass filter to obtain a resultant added-up signal. Another mixer circuit accumulates the added-up signal and second carrier signal to perform two-phase shift keying modulation thereon. Output signals of the mixer circuits are input to another adder so that they may be added up to obtain a QPSK signal as a modulated quadrature signal. The QPSK signal contains frequency signals whose frequencies are a sum of bit clock frequency and carrier frequency and a difference between them. When demodulating, the carrier signal and the bit clock signal are reproduced using the frequency signals.Type: ApplicationFiled: February 15, 2008Publication date: June 12, 2008Applicant: SONY CORPORATIONInventors: Kazuji Sasaki, Masaya Takano
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Patent number: 7142812Abstract: A wireless transmission system operating in a 60 GHz frequency range comprises fixed hubs (public download server) (2) and mobile terminals (1). The fixed hubs (2) have antennas (4) with a wide angle beam shape. The mobile terminals (1) have antennas (3) with a narrow angle beam shape. The fixed hubs (public download server) (2) are connected by means of a connection line (5) to an information source such as a network backbone or a main server.Type: GrantFiled: June 13, 2000Date of Patent: November 28, 2006Assignees: Sony Deutschland GmbH, Sony Corporation, Sony Electronics Inc.Inventors: Veselin Brankovic, Dragan Krupezevic, Mohamed Ratni, Hamid Amir-Alikhani, Kenichi Kawasaki, Kazuji Sasaki, Keiji Fukuzawa
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Publication number: 20050111582Abstract: A mixer circuit accumulates I signal (digital signal of first channel) having its band limited by low-pass filter and first carrier signal to perform two-phase shift keying modulation thereon. An adder adds fundamental-wave component of bit clock signal BCK into Q signal (digital signal of second channel) having its band limited by the another low-pass filter to obtain a resultant added-up signal. Another mixer circuit accumulates the added-up signal and second carrier signal to perform two-phase shift keying modulation thereon. Output signals of the mixer circuits are input to another adder so that they may be added up to obtain a QPSK signal as a modulated quadrature signal. The QPSK signal contains frequency signals whose frequencies are a sum of bit clock frequency and carrier frequency and a difference between them. When demodulating, the carrier signal and the bit clock signal are reproduced using the frequency signals.Type: ApplicationFiled: October 8, 2004Publication date: May 26, 2005Applicant: SONY CORPORATIONInventors: Kazuji Sasaki, Masaya Takano
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Patent number: 5625321Abstract: In a variable gain amplifier apparatus, wide input dynamic range can be secured and low noise characteristic can be obtained by employing first and second variable gain amplifiers have different noise characteristics and different saturation input levels and receive a same input signal. Output signals of the first and second variable gain amplifiers are added to each other to provide an output signal of the variable gain amplifier apparatus. Desired noise characteristic and saturation input level characteristic of the variable gain amplifier apparatus can be obtained by selecting the noise characteristics and the saturation input levels of the first and second variable gain amplifiers appropriately. This allows the variable gain amplifier apparatus to have a wide input dynamic range and low noise characteristic.Type: GrantFiled: October 23, 1995Date of Patent: April 29, 1997Assignee: Sony CorporationInventors: Kazuji Sasaki, Masayuki Katakura, Kazuyuki Saijo
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Patent number: 4800578Abstract: A synchronizing detecting circuit for a digital broadcasting receiver arranged such that serial sync. words of first and second series derived from an output of a 4-phase PSK demodulator (5) are respectively converted into first and second parallel sync. words, all bits of one word of the first and second parallel sync. data are inverted to bits of high level, even-numbered bits (or odd-numbered bits) are exchanged to one another and then supplied resepctively to first and second AND cirucits (38) and (39) and the sync. word is detected from at least one of the AND circuits to thereby detect a synchronizing signal at high probability.Type: GrantFiled: August 27, 1987Date of Patent: January 24, 1989Assignee: Sony CorporationInventor: Kazuji Sasaki