Patents by Inventor Naoto Yoshikawa
Naoto Yoshikawa 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).
-
Patent number: 11926741Abstract: A quinacridone solid solution pigment that allows a colored product to have high chroma and a properly yellowish hue and has a controlled particle diameter, and a method for producing the quinacridone solid solution pigment. In the method, a water-containing crude quinacridone solid solution is produced by a co-cyclization reaction of a diarylaminoterepththalic acid and a dialkylarylaminoterephthalic acid in polyphosphoric acid, then the resulting water-containing crude quinacridone solid solution having a mass ratio of unsubstituted quinacridone to a 2,9-dialkylquinacridone of 85:15 to 60:40 is dried, thereby obtaining a powdery, crude quinacridone solid solution having a water content of less than 1%. Then, the resulting powdery, crude quinacridone solid solution is heated in a liquid medium that does not dissolve the crude quinacridone solid solution. Also, a pigment dispersion liquid and an inkjet ink each containing the obtained quinacridone solid solution pigment are provided.Type: GrantFiled: March 30, 2018Date of Patent: March 12, 2024Assignee: Dainichiseika Color & Chemicals Mfg. Co., Ltd.Inventors: Naoto Kamata, Sachio Yoshikawa
-
Patent number: 11303314Abstract: In a receiver that demodulates a received signal, deterioration of signal quality is suppressed. A current output unit generates and outputs, from a voltage signal, a current signal including a predetermined offset current in a low-frequency component between a high-frequency component having a frequency higher than a predetermined frequency and the low-frequency component having a frequency lower than the predetermined frequency. A demodulation unit demodulates the high-frequency component. A filter circuit passes, in the current signal, the high-frequency component from a current output unit to the demodulation unit, and causes the low-frequency component to flow from the current output unit to a predetermined reference potential point.Type: GrantFiled: November 8, 2017Date of Patent: April 12, 2022Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATIONInventors: Nobuhisa Ozawa, Naoto Yoshikawa
-
Publication number: 20210281284Abstract: In a receiver that demodulates a received signal, deterioration of signal quality is suppressed. A current output unit generates and outputs, from a voltage signal, a current signal including a predetermined offset current in a low-frequency component between a high-frequency component having a frequency higher than a predetermined frequency and the low-frequency component having a frequency lower than the predetermined frequency. A demodulation unit demodulates the high-frequency component. A filter circuit passes, in the current signal, the high-frequency component from a current output unit to the demodulation unit, and causes the low-frequency component to flow from the current output unit to a predetermined reference potential point.Type: ApplicationFiled: November 8, 2017Publication date: September 9, 2021Applicant: Sony Semiconductor Solutions CorporationInventors: Nobuhisa OZAWA, Naoto YOSHIKAWA
-
Patent number: 10972057Abstract: This technology relates to a single-phase differential conversion circuit for improving the linearity of input/output characteristics, a signal processing method for use with the circuit, and a reception apparatus. The single-phase differential conversion circuit includes a first source-grounded amplifier and a second source-grounded amplifier. Each of the amplifiers includes a transconductance amplifier section including a transistor for converting an AC component of input potential to a current, a diode load section including a transistor in a diode connection configured as a first load, and a large-signal distortion compensation circuit configured as a second load connected in parallel with the first load. The transistors of the first source-grounded amplifier are each a P-type MOS transistor, and the transistors of the second source-grounded amplifier are each an N-type MOS transistor. This technology is applied advantageously to a reception apparatus for receiving TV signals, for example.Type: GrantFiled: December 6, 2017Date of Patent: April 6, 2021Assignee: SONY SEMICONDUCTOR SOLUTIONS CORPORATIONInventor: Naoto Yoshikawa
-
Publication number: 20200076377Abstract: This technology relates to a single-phase differential conversion circuit for improving the linearity of input/output characteristics, a signal processing method for use with the circuit, and a reception apparatus. The single-phase differential conversion circuit includes a first source-grounded amplifier and a second source-grounded amplifier. Each of the amplifiers includes a transconductance amplifier section including a transistor for converting an AC component of input potential to a current, a diode load section including a transistor in a diode connection configured as a first load, and a large-signal distortion compensation circuit configured as a second load connected in parallel with the first load. The transistors of the first source-grounded amplifier are each a P-type MOS transistor, and the transistors of the second source-grounded amplifier are each an N-type MOS transistor. This technology is applied advantageously to a reception apparatus for receiving TV signals, for example.Type: ApplicationFiled: December 6, 2017Publication date: March 5, 2020Inventor: NAOTO YOSHIKAWA
-
Patent number: 10581184Abstract: A connector includes a housing and terminals held by the housing, the housing includes flat plate-like terminal holding portions and contact portion storage opening opened to lower faces of the terminal holding portions. The terminals each have a main body, a U-shaped contact portion that is connected to a front end of the main body and protrudes downward, and a tip portion connected to a front end of the contact portion. The contact portion includes a pair of leg portions extending downward, and a bottom portion coupling lower ends of the leg portions to each other. The main body and the tip portion are integrally connected and held by the terminal holding portions, and the contact portion is stored in the contact portion storage opening.Type: GrantFiled: January 18, 2019Date of Patent: March 3, 2020Assignee: Molex, LLCInventors: Shiro Tsukashima, Daiki Tanaka, Naoto Yoshikawa
-
Patent number: 10498065Abstract: A base member is made of thermoplastic resin. A plurality of terminals are each inserted in a corresponding one of through holes formed through the base member. The terminals include fixed portions positioned on an upper surface of the base member. The base member includes a first fixing portion integrally formed with the base member. The first fixing portion has a covering portion overlapping with the fixed portion and fixing the fixed portion to the upper surface of the base member.Type: GrantFiled: August 28, 2018Date of Patent: December 3, 2019Assignee: Molex, LLCInventors: Naoto Sasayama, Yuji Naito, Naoto Yoshikawa, Toshitaka Kusuhara
-
Patent number: 10404312Abstract: The present disclosure relates to a signal processing apparatus capable of reducing a circuit scale when transmitting and receiving a signal from an antenna. A first n-type MOS transistor amplifies a transmission signal to be transmitted from the antenna. A second n-type MOS transistor supplies a reception signal to be received from the antenna to a reception circuit. The first n-type MOS transistor and the second n-type MOS transistor are connected to the antenna in series. Furthermore, the reception circuit is connected to a contact between the first n-type MOS transistor and the second n-type MOS transistor. The present disclosure is capable of being applied to, for example, a radio transceiver.Type: GrantFiled: May 20, 2016Date of Patent: September 3, 2019Assignee: SONY CORPORATIONInventors: Naoto Yoshikawa, Shinya Tada
-
Publication number: 20190229447Abstract: A connector includes a housing and terminals held by the housing, the housing includes flat plate-like terminal holding portions and contact portion storage opening opened to lower faces of the terminal holding portions. The terminals each have a main body, a U-shaped contact portion that is connected to a front end of the main body and protrudes downward, and a tip portion connected to a front end of the contact portion. The contact portion includes a pair of leg portions extending downward, and a bottom portion coupling lower ends of the leg portions to each other. The main body and the tip portion are integrally connected and held by the terminal holding portions, and the contact portion is stored in the contact portion storage opening.Type: ApplicationFiled: January 18, 2019Publication date: July 25, 2019Applicant: Molex, LLCInventors: Shiro TSUKASHIMA, Daiki TANAKA, Naoto YOSHIKAWA
-
Publication number: 20190074623Abstract: A base member is made of thermoplastic resin. A plurality of terminals are each inserted in a corresponding one of through holes formed through the base member. The terminals include fixed portions positioned on an upper surface of the base member. The base member includes a first fixing portion integrally formed with the base member. The first fixing portion has a covering portion overlapping with the fixed portion and fixing the fixed portion to the upper surface of the base member.Type: ApplicationFiled: August 28, 2018Publication date: March 7, 2019Applicant: Molex, LLCInventors: Naoto SASAYAMA, Yuji NAITO, Naoto YOSHIKAWA, Toshitaka KUSUHARA
-
Patent number: 10170849Abstract: A receptacle connector is provided with a slider and a first securing metal fitting. The slider can slide between a locking position where the slider locks a plug connector and a lock releasing position where the slider is separated from the plug connector to an outer side in a longitudinal direction such that locking of the plug connector is released. The first securing metal fitting has the hook, and the slider has the first engageable part that engages with the hook to retain the slider in a selected position.Type: GrantFiled: March 22, 2018Date of Patent: January 1, 2019Assignee: Molex, LLCInventors: Daiki Tanaka, Yuji Naito, Naoto Yoshikawa
-
Patent number: 10110171Abstract: An output signal can be free of any noise component generated from an amplifier disposed in a path, without degradation of the S/N ratio of the output signal. An amplifier includes: a first amplifier that is connected to an input node and generates a first intermediate signal; a feedback resistor that enables feedback of the first intermediate signal to the input node; an attenuator that receives the first intermediate signal and generates a second intermediate signal; a second amplifier that is connected to the input node and generates a third intermediate signal; a third amplifier that is connected to the input node and generates a fourth intermediate signal; and an adder that generates an output signal, using the second intermediate signal, the third intermediate signal, and the fourth intermediate signal.Type: GrantFiled: November 19, 2015Date of Patent: October 23, 2018Assignee: SONY CORPORATIONInventors: Katsuaki Takahashi, Hideyuki Takano, Naoto Yoshikawa
-
Publication number: 20180294586Abstract: A receptacle connector is provided with a slider and a first securing metal fitting. The slider can slide between a locking position where the slider locks a plug connector and a lock releasing position where the slider is separated from the plug connector to an outer side in a longitudinal direction such that locking of the plug connector is released. The first securing metal fitting has the hook, and the slider has the first engageable part that engages with the hook.Type: ApplicationFiled: March 22, 2018Publication date: October 11, 2018Applicant: Molex, LLCInventors: Daiki TANAKA, Yuji Naito, Naoto Yoshikawa
-
Publication number: 20180159581Abstract: The present disclosure relates to a signal processing apparatus capable of reducing a circuit scale when transmitting and receiving a signal from an antenna. A first n-type MOS transistor amplifies a transmission signal to be transmitted from the antenna. A second n-type MOS transistor supplies a reception signal to be received from the antenna to a reception circuit. The first n-type MOS transistor and the second n-type MOS transistor are connected to the antenna in series. Furthermore, the reception circuit is connected to a contact between the first n-type MOS transistor and the second n-type MOS transistor. The present disclosure is capable of being applied to, for example, a radio transceiver.Type: ApplicationFiled: May 20, 2016Publication date: June 7, 2018Inventors: NAOTO YOSHIKAWA, SHINYA TADA
-
Publication number: 20170338774Abstract: An output signal can be free of any noise component generated from an amplifier disposed in a path, without degradation of the S/N ratio of the output signal. An amplifier includes: a first amplifier that is connected to an input node and generates a first intermediate signal; a feedback resistor that enables feedback of the first intermediate signal to the input node; an attenuator that receives the first intermediate signal and generates a second intermediate signal; a second amplifier that is connected to the input node and generates a third intermediate signal; a third amplifier that is connected to the input node and generates a fourth intermediate signal; and an adder that generates an output signal, using the second intermediate signal, the third intermediate signal, and the fourth intermediate signal.Type: ApplicationFiled: November 19, 2015Publication date: November 23, 2017Inventors: KATSUAKI TAKAHASHI, HIDEYUKI TAKANO, NAOTO YOSHIKAWA
-
Patent number: 9621139Abstract: Provided with one or more first transistors of a first conductivity type each including a gate, a source, and a drain, the gate being connected to an input terminal, the source being configured to be connected to a first voltage source, the drain being connected to an output node, one or more second transistors of a second conductivity type each including a gate, a source, and a drain, the gate being connected to the input terminal, the source being configured to be connected to a second voltage source, the drain being connected to the output node, a first resistor that is inserted and connected between the input terminal and the output node, a first output terminal that is connected to the input terminal, and a second output terminal that is directly or indirectly connected to the output node.Type: GrantFiled: May 14, 2013Date of Patent: April 11, 2017Assignee: SONY CORPORATIONInventors: Naoto Yoshikawa, Ken Yamamoto
-
Patent number: 9548554Abstract: The connector for a card has a housing for accommodating a card provided with terminal members, and connecting terminals mounted in the housing and contacting the terminal members of the card. Here, at least one of the connecting terminals has a base portion provided along a rear edge of the housing, at least some of the base portion is embedded in a bottom wall portion of the housing, and a contact member forming a hoop along with the base portion. The contact member has a pair of spring portions connected to the base portion, a joining portion joining the pair of spring portions, and a contact portion connected to the leading end of the joining portion for contacting the terminal members of the card.Type: GrantFiled: February 18, 2016Date of Patent: January 17, 2017Assignee: Molex, LLCInventors: Naoto Yoshikawa, Masanori Hayashi, Yasuyoshi Matsumoto, Yuki Goto, Mitsuhiro Tomita
-
Patent number: 9543999Abstract: A card connector for receiving an inserted card module having electrode pads on one surface is provided. The card connector includes a housing and a plurality of terminals. The housing has a terminal holding portion. Each terminal has a base portion held in the terminal holding portion and a cantilevered arm portion extending from the base portion in a transverse direction relative to an insertion direction of the card module in plan view. The arm portion has a curved portion shaped so as to have a curved surface with a centerline of curvature positioned upwards in side view and a pair of oblique portions inclined relative to an extension direction of the arm portion on both sides of an apex portion positioned on a free end. The terminals contact the electrode pads of the card module.Type: GrantFiled: November 4, 2015Date of Patent: January 10, 2017Assignee: Molex, LLCInventors: Toshitaka Kusuhara, Naoto Yoshikawa, Koji Murakami
-
Publication number: 20160226174Abstract: The connector for a card has a housing for accommodating a card provided with terminal members, and connecting terminals mounted in the housing and contacting the terminal members of the card. Here, at least one of the connecting terminals has a base portion provided along a rear edge of the housing, at least some of the base portion is embedded in a bottom wall portion of the housing, and a contact member forming a hoop along with the base portion. The contact member has a pair of spring portions connected to the base portion, a joining portion joining the pair of spring portions, and a contact portion connected to the leading end of the joining portion for contacting the terminal members of the card.Type: ApplicationFiled: February 18, 2016Publication date: August 4, 2016Applicant: Molex, LLCInventors: Naoto Yoshikawa, Masanori HAYASHI, Yasuyoshi MATSUMOTO, Yuki GOTO, Mitsuhiro TOMITA
-
Publication number: 20160149330Abstract: A card connector for receiving an inserted card module having electrode pads on one surface is provided. The card connector includes a housing and a plurality of terminals. The housing has a terminal holding portion. Each terminal has a base portion held in the terminal holding portion and a cantilevered arm portion extending from the base portion in a transverse direction relative to an insertion direction of the card module in plan view. The arm portion has a curved portion shaped so as to have a curved surface with a centerline of curvature positioned upwards in side view and a pair of oblique portions inclined relative to an extension direction of the arm portion on both sides of an apex portion positioned on a free end. The terminals contact the electrode pads of the card module.Type: ApplicationFiled: November 4, 2015Publication date: May 26, 2016Applicant: Molex, LLCInventors: Toshitaka KUSUHARA, Naoto YOSHIKAWA, Koji MURAKAMI