Patents by Inventor Yu-Ren Liu
Yu-Ren Liu 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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Publication number: 20150180493Abstract: A capacitor sensor circuit may be used in application such as touch screens. The capacitor sensor circuit includes a transimpedance amplifier, a filter module, a rectifier, an integrator and an analog to digital converter. Since a transmission signal fed into the capacitor sensor circuit has been preprocessed through the rectifier and the integrator, the analog to digital converter to be used can be a low speed analog to digital converter that has lower power consumption and a lower cost of manufacturing compared to a high speed analog to digital converter.Type: ApplicationFiled: December 23, 2013Publication date: June 25, 2015Inventors: Yu-Ren Liu, Ping-Pao Cheng
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Patent number: 7786796Abstract: An audio amplifier including a differential mode integrator, a first comparator, a second comparator, a logic circuit and a driving unit is provided. The differential mode integrator receives a differential input signal and a differential output signal and outputs a differential mode intermediate signal. The first comparator has a positive input terminal receiving a first terminal signal of the differential mode intermediate signal, a negative input terminal receiving a ramp signal, and generates a first signal. The second comparator has a positive input terminal receiving a ramp signal, a negative input terminal receiving a second terminal signal of the differential mode intermediate signal, and generates a second signal. The logic circuit performs a logic operation on the first and second signals to generate a third signal and a fourth signal. The driving unit generates a differential output signal to drive a load according to the third and fourth signals.Type: GrantFiled: February 4, 2009Date of Patent: August 31, 2010Assignee: ITE Tech. Inc.Inventor: Yu-Ren Liu
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Publication number: 20100134185Abstract: An audio amplifier including a differential mode integrator, a first comparator, a second comparator, a logic circuit and a driving unit is provided. The differential mode integrator receives a differential input signal and a differential output signal and outputs a differential mode intermediate signal. The first comparator has a positive input terminal receiving a first terminal signal of the differential mode intermediate signal, a negative input terminal receiving a ramp signal, and generates a first signal. The second comparator has a positive input terminal receiving a ramp signal, a negative input terminal receiving a second terminal signal of the differential mode intermediate signal, and generates a second signal. The logic circuit performs a logic operation on the first and second signals to generate a third signal and a fourth signal. The driving unit generates a differential output signal to drive a load according to the third and fourth signals.Type: ApplicationFiled: February 4, 2009Publication date: June 3, 2010Applicant: ITE TECH. INC.Inventor: Yu-Ren Liu
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Patent number: 7450045Abstract: A Delta-Sigma analog-to-digital converter and a method thereof are provided. According to a non-overlapping clock signal, the Delta-Sigma analog-to-digital converter performs an integration process on the difference between a plurality of input signals and the corresponding feedback signals to generate an integrated signal. Then, according to a selecting signal, the integrated signal is selectively output. Afterward, according to a latch signal, the selectively output integrated signal is quantized and latched by only one quantizer, thereby generating a digital output signal correspondingly. Accordingly, by using only one quantizer, the present invention can have the same function as the prior art which uses a plurality of quantizers, thereby decreasing the occupied chip area.Type: GrantFiled: October 3, 2006Date of Patent: November 11, 2008Assignee: ITE Tech. Inc.Inventor: Yu-Ren Liu
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Publication number: 20080024348Abstract: A Delta-Sigma analog-to-digital converter and a method thereof are provided. According to a non-overlapping clock signal, the Delta-Sigma analog-to-digital converter performs an integration process on the difference between a plurality of input signals and the corresponding feedback signals to generate an integrated signal. Then, according to a selecting signal, the integrated signal is selectively output. Afterward, according to a latch signal, the selectively output integrated signal is quantized and latched by only one quantizer, thereby generating a digital output signal correspondingly. Accordingly, by using only one quantizer, the present invention can have the same function as the prior art which uses a plurality of quantizers, thereby decreasing the occupied chip area.Type: ApplicationFiled: October 3, 2006Publication date: January 31, 2008Applicant: ITE TECH. INC.Inventor: Yu-Ren Liu
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Patent number: 6799371Abstract: A method for manufacturing a steel tire mold that uses CAD and CAM software to design the shapes of the mold and develop numerical sequences for computer numerical controlled (CNC) machines, electrodes for an electric discharge machine (EDM) and characters and designs on the tire, and the CNC lathe forms the different designed parts. Alignment and assembly holes are bored so the parts can be assembled to form a semi-finished mold. The tread design is formed in the electrode by the CNC machine, and the electrode is used with an electric discharge machine to cut the tread design in the mold. The CNC engraving machine cuts the characters and designs in the mold. Finally, the mold is dressed to remove any burrs, and the mold is a finished product.Type: GrantFiled: August 14, 2002Date of Patent: October 5, 2004Inventor: Yu-Ren Liu
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Publication number: 20040034445Abstract: A method for manufacturing a steel tire mold that uses CAD and CAM software to design the shapes of the mold and develop numerical sequences for computer numerical controlled (CNC) machines, electrodes for an electric discharge machine (EDM) and characters and designs on the tire, and the CNC lathe forms the different designed parts. Alignment and assembly holes are bored so the parts can be assembled to form a semi-finished mold. The tread design is formed in the electrode by the CNC machine, and the electrode is used with an electric discharge machine to cut the tread design in the mold. The CNC engraving machine cuts the characters and designs in the mold. Finally, the mold is dressed to remove any burrs, and the mold is a finished product.Type: ApplicationFiled: August 14, 2002Publication date: February 19, 2004Applicant: Ming King Industrial Co., Ltd.Inventor: Yu-Ren Liu
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Publication number: 20030178115Abstract: A tire structure for a bicycle includes a tire body having an outer periphery, and a tread integrally formed on the outer periphery of the tire body. The tread includes an inner layer having a first color, and an outer layer coated on the inner layer and having a second color different from the first color. The outer layer formed with a plurality of openings, thereby exposing the inner layer outward from the outer layer through the plurality of openings. In such a manner, the inner layer and the outer layer of the tread present at least two different colors, thereby increasing the aesthetic quality of the tire structure of the bicycle.Type: ApplicationFiled: March 25, 2002Publication date: September 25, 2003Inventor: Yu-Ren Liu
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Publication number: 20020108690Abstract: A tire structure includes a hole defined through a sidewall of the tire and a flexible valve is inserted in the hole. A passage is defined longitudinally through the flexible valve and the flexible valve is deformed by the sidewall so as to seal the passage.Type: ApplicationFiled: February 12, 2001Publication date: August 15, 2002Inventor: Yu-Ren Liu
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Publication number: 20020074070Abstract: A tire is engaged with a wheel rim and a hole is defined through the wheel rim. A flexible valve is inserted in the hole and a passage is defined through the flexible valve. The passage is sealed by pressure when the tire is inflated.Type: ApplicationFiled: December 14, 2000Publication date: June 20, 2002Inventor: Yu-Ren Liu
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Patent number: D457484Type: GrantFiled: July 2, 2001Date of Patent: May 21, 2002Inventor: Yu-Ren Liu
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Patent number: D464607Type: GrantFiled: January 29, 2002Date of Patent: October 22, 2002Assignees: Link Treasure Limited, Innova Rubber Co., Ltd.Inventors: Yu-Ren Liu, Cheng-Fan Yang
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Patent number: D464608Type: GrantFiled: January 29, 2002Date of Patent: October 22, 2002Assignees: Link Treasure Limited, Innova Rubber Co., Ltd.Inventors: Yu-Ren Liu, Cheng-Fan Yang