Patents by Inventor Shu-Sun Yu
Shu-Sun Yu 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: 9300311Abstract: A dynamic element matching method for a multi-unit-element digital-to-analog converter having unit elements comprises several steps. An element selection probability is determined as a function of a number of the unit elements and a digital signal. Next, loop filter output signals are generated as a function of the determined element selection probability and control signals for the unit elements. Certain ones of the unit elements are selected as a function of the generated loop filter output signals. The selected certain ones of the unit elements are activated for output of the converter.Type: GrantFiled: April 2, 2014Date of Patent: March 29, 2016Assignee: Amlogic Co., Ltd.Inventors: Jinbao Lan, Haihong Zhao, Yong Zhang, Ming Shi, Shu-Sun Yu, Chieh-Yuan Chao
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Publication number: 20150288374Abstract: A dynamic element matching method for a multi-unit-element digital-to-analog converter having unit elements comprises several steps. An element selection probability is determined as a function of a number of the unit elements and a digital signal. Next, loop filter output signals are generated as a function of the determined element selection probability and control signals for the unit elements. Certain ones of the unit elements are selected as a function of the generated loop filter output signals. The selected certain ones of the unit elements are activated for output of the converter.Type: ApplicationFiled: April 2, 2014Publication date: October 8, 2015Applicant: Amlogic Co., Ltd.Inventors: Jinbao Lan, Haihong Zhao, Yong Zhang, Ming Shi, Shu-Sun Yu, Chieh-Yuan Chao
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Patent number: 8976053Abstract: Some embodiments of the present invention provide a method and apparatus for a Vernier ring time to digital converter having a single clock input and an all digital circuit that calculates a fixed delay relationship between a set of slow buffers and fast buffers. A method for calibrating a Vernier Delay Line of a TDC, comprising the steps of inputting a reference clock to a slow buffer and to a fast buffer, determining a delay ratio of the slow buffer and fast buffer; and adjusting the delay ratio of the slow buffer and fast buffer to a fixed delay ratio value wherein an up-down accumulator generates control signals to adjust the slow buffer.Type: GrantFiled: October 4, 2013Date of Patent: March 10, 2015Assignee: Amlogic Co., Ltd.Inventors: Weicheng Zhang, Ming Shi, Wei-Hua Zou, Shu-Sun Yu, Chieh-Yuan Chao
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Publication number: 20130030881Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: ApplicationFiled: July 20, 2012Publication date: January 31, 2013Inventors: James E. O'Toole, John R. Tuttle, Mark E. Tuttle, Tyler Lowrey, Kevin M. Devereaux, George E. Pax, Brian P. Higgins, David K. Ovard, Shu-Sun Yu, Robert R. Rotzoll
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Patent number: 8102197Abstract: An adaptive digital phase locked loop comprises: a digital configurable phase detector for receiving a reference signal and a feedback signal and for generating a detection signal indicative of a phase/frequency difference between the reference signal and the feedback signal; a configurable digital loop filter for filtering the DPFD detection signal; a digital locking monitor for monitoring polarity transitions of the detection signal and adaptively switching the locking modes and DCO tuning resolution; and a DCO for generating the feedback signal as a function of the detection signal.Type: GrantFiled: October 28, 2010Date of Patent: January 24, 2012Assignee: Amlogic Co., Ltd.Inventors: Weicheng Zhang, Ming Shi, Wei-Hua Zou, Shu-Sun Yu, Chieh-Yuan Chao
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Publication number: 20120013377Abstract: An adaptive digital phase locked loop comprises: a digital configurable phase detector for receiving a reference signal and a feedback signal and for generating a detection signal indicative of a phase/frequency difference between the reference signal and the feedback signal; a configurable digital loop filter for filtering the DPFD detection signal; a digital locking monitor for monitoring polarity transitions of the detection signal and adaptively switching the locking modes and DCO tuning resolution; and a DCO for generating the feedback signal as a function of the detection signal.Type: ApplicationFiled: October 28, 2010Publication date: January 19, 2012Applicant: AMLOGIC CO., LTD.Inventors: Weicheng Zhang, Ming Shi, Wei-Hua Zou, Shu-Sun Yu, Chieh-Yuan Chao
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Patent number: 8081013Abstract: A method for digital phase detection, comprises the steps of: providing a reference clock; receiving a feedback clock; determining a timing difference between the reference clock and the feedback clock; determining a polarity that indicates the leading or lagging relationship between the reference clock and the feedback clock; adaptively selecting one of at least two operating modes for generating a quantized level indicative of the timing difference, wherein in a first operating mode the quantized level is a constant maximum value and wherein in a second operating mode the quantized level is proportional to the timing difference; and generating a digital phase detection output as a combination of the polarity and the quantized level.Type: GrantFiled: July 13, 2010Date of Patent: December 20, 2011Assignee: Amlogic Co., Ltd.Inventors: Weicheng Zhang, Ming Shi, Wei-Hua Zou, Shu-Sun Yu, Chieh-Yuan Chao
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Patent number: 7825774Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: GrantFiled: October 25, 2007Date of Patent: November 2, 2010Assignee: Round Rock Research, LLCInventors: James E. O'Toole, John R. Tuttle, Mark E. Tuttle, Tyler A. Lowrey, Kevin M. Devereaux, George E. Pax, Brian P. Higgins, Shu-Sun Yu, David K. Ovard, Robert R. Rotzoll
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Patent number: 7786845Abstract: Identification information is wirelessly communicated between radio frequency devices. In one embodiment, a first wireless device transmits a signal to request identification information. Other wireless devices are each affixed a respective item, and each of the other wireless devices determines if a reply signal is to be transmitted, and if so, communicates the reply signal to the first wireless device.Type: GrantFiled: August 29, 2007Date of Patent: August 31, 2010Assignee: Round Rock Research, LLCInventors: James E. O'Toole, John R. Tuttle, Mark E. Tuttle, Tyler Lowrey, Kevin M. Devereaux, George E. Pax, Brian P. Higgins, David K. Ovard, Shu-Sun Yu, Robert R. Rotzoll
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Patent number: 7777610Abstract: In one embodiment, a method includes transmitting a signal from a wireless transmitter to a radio frequency (RF) device of a plurality of RF devices within a communication range of the transmitter. The signal is to select a group of the RF devices. A reply signal is received from each RF device if the respective RF device determines that it is a member of the group.Type: GrantFiled: August 29, 2007Date of Patent: August 17, 2010Assignee: Round Rock Research, LLCInventors: James E. O'Toole, John R. Tuttle, Mark E. Tuttle, Tyler Lowrey, Kevin M. Devereaux, George E. Pax, Brian P. Higgins, David K. Ovard, Shu-Sun Yu, Robert R. Rotzoll
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Patent number: 7545256Abstract: To identify an RFID tag in a field of RFID tags, an interrogator sends a series of commands to implement an arbitration scheme. The commands include differentiation, selection, and modulation information. The tag uses the differentiation information to differentiate commands sent by the interrogator from commands sent by other interrogators that may be within communication range of the tag. The selection information is used by the tag to determine if the tag is a member of a group selected by the interrogator for response to the interrogator. If the tag is a member of the selected group, the tag may send a reply that is modulated using a modulation type selected by the modulation information. In accordance with one of the modulation types, one of three different pulse waveforms is selected by the interrogator via the modulation information to multiply with the baseband waveform of the reply from the tag.Type: GrantFiled: November 28, 2006Date of Patent: June 9, 2009Assignee: Keystone Technology Solutions, LLCInventors: James E. O'Toole, John R. Tuttle, Mark E. Tuttle, Tyler A. Lowrey, Kevin M. Devereaux, George E. Pax, Brian P. Higgins, Shu-Sun Yu, David K. Ovard, Robert R. Rotzoll
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Publication number: 20080211636Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: ApplicationFiled: October 25, 2007Publication date: September 4, 2008Inventors: James E. O'Toole, John R. Tuttle, Mark E. Tuttle, Tyler A. Lowrey, Kevin M. Devereaux, George E. Pax, Brian P. Higgins, David K. Ovard, Shu-Sun Yu, Robert R. Rotzoll
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Patent number: 7385477Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: GrantFiled: November 29, 2005Date of Patent: June 10, 2008Assignee: Keystone Technology Solutions, LLCInventors: James E. O'Toole, John R. Tuttle, Mark E. Tuttle, Tyler F. Lowrey, Kevin M. Devereaux, George E. Pax, Brian P. Higgins, Shu-Sun Yu, David K. Ovard, Robert R. Rotzoll
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Publication number: 20080048835Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: ApplicationFiled: August 29, 2007Publication date: February 28, 2008Inventors: James O'Toole, John Tuttle, Mark Tuttle, Tyler Lowrey, Kevin Devereaux, George Pax, Brian Higgins, David Ovard, Shu-Sun Yu, Robert Rotzoll
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Publication number: 20080048832Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: ApplicationFiled: August 30, 2007Publication date: February 28, 2008Inventors: James O'Toole, John Tuttle, Mark Tuttle, Tyler Lowrey, Kevin Devereaux, George Pax, Brian Higgins, David Ovard, Shu-Sun Yu, Robert Rotzoll
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Publication number: 20080030306Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: ApplicationFiled: August 30, 2007Publication date: February 7, 2008Inventors: James O'Toole, John Tuttle, Mark Tuttle, Tyler Lowrey, Kevin Devereaux, George Pax, Brian Higgins, David Ovard, Shu-Sun Yu, Robert Rotzoll
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Publication number: 20080030353Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: ApplicationFiled: August 29, 2007Publication date: February 7, 2008Inventors: James O'Toole, John Tuttle, Mark Tuttle, Tyler Lowrey, Kevin Devereaux, George Pax, Brian Higgins, David Ovard, Shu-Sun Yu, Robert Rotzoll
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Publication number: 20070293209Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: ApplicationFiled: August 30, 2007Publication date: December 20, 2007Inventors: James O'Toole, John Tuttle, Mark Tuttle, Tyler Lowrey, Kevin Devereaux, George Pax, Brian Higgins, David Ovard, Shu-Sun Yu, Robert Rotzoll
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Publication number: 20070139164Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: ApplicationFiled: November 28, 2006Publication date: June 21, 2007Inventors: James O'Toole, John Tuttle, Mark Tuttle, Tyler Lowrey, Kevin Devereaux, George Pax, Brian Higgins, Shu-Sun Yu, David Ovard, Robert Rotzoll
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Patent number: 7170867Abstract: A radio frequency identification device includes an integrated circuit including a receiver, a transmitter, and a microprocessor. The receiver and transmitter together define an active transponder. The integrated circuit is preferably a monolithic single die integrated circuit including the receiver, the transmitter, and the microprocessor. Because the device includes an active transponder, instead of a transponder which relies on magnetic coupling for power, the device has a much greater range.Type: GrantFiled: April 12, 2004Date of Patent: January 30, 2007Assignee: Micron Technology, Inc.Inventors: James E. O'Toole, John R. Tuttle, Mark E. Tuttle, Tyler Lowrey, Kevin M. Devereaux, George E. Pax, Brian P. Higgins, Shu-Sun Yu, David K. Ovard, Robert R. Rotzoll