Patents by Inventor Tingjun Wen
Tingjun Wen 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: 20240313801Abstract: Described herein is a fractional phase locked loop with sigma-delta modulator (SDM) quantization noise cancellation. The fractional phase includes a digital filter configured to receive an error signal based on a comparison of a reference clock and a feedback clock, a controlled oscillator configured to generate an output clock by adjusting a frequency of the controlled oscillator based on a control signal output by the digital filter, the feedback clock being based on the output clock, a sigma-delta modulator configured to control division of the output clock to generate a divided output clock which includes a sigma-delta modulator quantization noise and a digital-to-time converter configured to receive a cancellation code from an integrator in the sigma-delta modulator and cancel the sigma-delta modulator quantization noise in the divided output clock with the cancellation code to generate the feedback clock.Type: ApplicationFiled: May 24, 2024Publication date: September 19, 2024Applicant: Ciena CorporationInventors: Tingjun Wen, Sadok Aouini, Naim Ben-Hamida, Matthew Mikkelsen, Soheyl Ziabakhsh Shalmani, Mohammad Honarparvar
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Patent number: 12034460Abstract: Described herein is a fractional phase locked loop with sigma-delta modulator (SDM) quantization noise cancellation. The fractional phase includes a digital filter configured to receive an error signal based on a comparison of a reference clock and a feedback clock, a controlled oscillator configured to generate an output clock by adjusting a frequency of the controlled oscillator based on a control signal output by the digital filter, the feedback clock being based on the output clock, a sigma-delta modulator configured to control division of the output clock to generate a divided output clock which includes a sigma-delta modulator quantization noise and a digital-to-time converter configured to receive a cancellation code from an integrator in the sigma-delta modulator and cancel the sigma-delta modulator quantization noise in the divided output clock with the cancellation code to generate the feedback clock.Type: GrantFiled: July 20, 2022Date of Patent: July 9, 2024Assignee: Ciena CorporationInventors: Tingjun Wen, Sadok Aouini, Naim Ben-Hamida, Matthew Mikkelsen, Soheyl Ziabakhsh Shalmani, Mohammad Honarparvar
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Publication number: 20240030932Abstract: Described herein is a fractional phase locked loop with sigma-delta modulator (SDM) quantization noise cancellation. The fractional phase includes a digital filter configured to receive an error signal based on a comparison of a reference clock and a feedback clock, a controlled oscillator configured to generate an output clock by adjusting a frequency of the controlled oscillator based on a control signal output by the digital filter, the feedback clock being based on the output clock, a sigma-delta modulator configured to control division of the output clock to generate a divided output clock which includes a sigma-delta modulator quantization noise and a digital-to-time converter configured to receive a cancellation code from an integrator in the sigma-delta modulator and cancel the sigma-delta modulator quantization noise in the divided output clock with the cancellation code to generate the feedback clock.Type: ApplicationFiled: July 20, 2022Publication date: January 25, 2024Applicant: Ciena CorporationInventors: Tingjun Wen, Sadok Aouini, Naim Ben-Hamida, Matthew Mikkelsen, Soheyl Ziabakhsh Shalmani, Mohammad Honarparvar
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Patent number: 11804847Abstract: A circuit includes a programmable frequency divider which receives a high-speed clock, fin, as an input and which provides a modulated reference clock as an output; a Sigma-Delta modulator which receives a Frequency Control Word (FCW) and which is connected to the programmable frequency divider to receive the modulated reference clock as a sample clock and to control an average frequency of the modulated reference clock; and an integer-N Phase Lock Loop (PLL) which receives the modulated reference clock and outputs a clock output.Type: GrantFiled: November 30, 2018Date of Patent: October 31, 2023Assignee: Ciena CorporationInventors: Sadok Aouini, Matthew Mikkelsen, Naim Ben-Hamida, Mahdi Parvizi, Tingjun Wen, Calvin Plett
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Publication number: 20230294669Abstract: The present disclosure provides a control method, a vehicle, and a storage medium, wherein the control method comprises: determining lane line information according to image information or map information; determining a parking trajectory according to the lane line information; and controlling the vehicle according to the parking trajectory. In the method, the problem that the vehicle, when the autonomous driving system fails, cannot be safely parked is solved; the image information or the map information is taken as auxiliary information for safe parking, lane line information of a road where the vehicle is located is determined according to the image information or the map information, and assisted parking is performed through the lane line information. The parking trajectory is determined through the lane line information, the vehicle is controlled according to the parking trajectory, and the safe parking of the vehicle is achieved.Type: ApplicationFiled: March 9, 2023Publication date: September 21, 2023Inventors: Tingjun WEN, Jie Yang, Siquan CHEN
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Patent number: 11218155Abstract: Described is a digital fractional phase locked loop (DFPLL) with a current mode low pass filter. The DFPLL includes a binary phase frequency detector (BPFD) configured to output a directional pulse based on comparison of a reference clock and a feedback clock, a current mode low pass filter connected to the BPFD, and a current controlled oscillator (CCO) connected to the current mode low pass filter. The current mode low pass filter configured to output a control current based on at least the directional pulse when a current steering switch directly controlled by the directional pulse switches to the CCO. The CCO configured to adjust a frequency of the CCO based on the control current to generate an output clock. The feedback clock based on the output clock and the reference clock aligned with the feedback clock by adjusting the frequency of the output clock until frequency and phase lock.Type: GrantFiled: November 23, 2020Date of Patent: January 4, 2022Assignee: Ciena CorporationInventors: Tingjun Wen, Sadok Aouini, Naim Ben-Hamida, Mahdi Parvizi, Matthew Mikkelsen
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Publication number: 20210273644Abstract: Described is a digital fractional phase locked loop (DFPLL) with a current mode low pass filter. The DFPLL includes a binary phase frequency detector (BPFD) configured to output a directional pulse based on comparison of a reference clock and a feedback clock, a current mode low pass filter connected to the BPFD, and a current controlled oscillator (CCO) connected to the current mode low pass filter. The current mode low pass filter configured to output a control current based on at least the directional pulse when a current steering switch directly controlled by the directional pulse switches to the CCO. The CCO configured to adjust a frequency of the CCO based on the control current to generate an output clock. The feedback clock based on the output clock and the reference clock aligned with the feedback clock by adjusting the frequency of the output clock until frequency and phase lock.Type: ApplicationFiled: November 23, 2020Publication date: September 2, 2021Applicant: Ciena CorporationInventors: Tingjun Wen, Sadok Aouini, Naim Ben-Hamida, Mahdi Parvizi, Matthew Mikkelsen
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Patent number: 10979059Abstract: Described herein are apparatus and methods for a successive approximation register (SAR) analog-to-digital (ADC) based phase-locked loop (PLL) with programmable range. A multi-bit digital phase locked loop includes a multi-bit phase frequency detector configured to output a multi-bit error signal based on a reference clock, a feedback clock sampled using the reference clock, and a threshold voltage, a multi-bit digital low pass filter configured to apply a variable gain to the multi-bit error signal, a current steered digital-to-analog converter configured to generate a control current based on a gain applied multi-bit error signal and multi-bit digital phase locked loop control parameters, a controlled oscillator configured to adjust a frequency of the controlled oscillator based on the control current to generate an output clock, the feedback clock being based on the output clock, and a programmable edge time controller configured to adjust a slope of an edge of the feedback clock.Type: GrantFiled: October 26, 2020Date of Patent: April 13, 2021Assignee: Ciena CorporationInventors: Soheyl Ziabakhsh Shalmani, Sadok Aouini, Matthew Mikkelsen, Hazem Beshara, Tingjun Wen, Mohammad Honarparvar, Naim Ben-Hamida
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Patent number: 10848164Abstract: Described is a digital fractional phase locked loop (DFPLL) with a current mode low pass filter. The DFPLL includes a binary phase frequency detector (BPFD) configured to output a directional pulse based on comparison of a reference clock and a feedback clock, a current mode low pass filter connected to the BPFD, and a current controlled oscillator (CCO) connected to the current mode low pass filter. The current mode low pass filter configured to output a control current based on at least the directional pulse when a current steering switch directly controlled by the directional pulse switches to the CCO. The CCO configured to adjust a frequency of the CCO based on the control current to generate an output clock. The feedback clock based on the output clock and the reference clock aligned with the feedback clock by adjusting the frequency of the output clock until frequency and phase lock.Type: GrantFiled: February 28, 2020Date of Patent: November 24, 2020Assignee: Ciena CorporationInventors: Tingjun Wen, Sadok Aouini, Naim Ben-Hamida, Mahdi Parvizi, Matthew Mikkelsen
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Publication number: 20200177194Abstract: A circuit includes a programmable frequency divider which receives a high-speed clock, fin, as an input and which provides a modulated reference clock as an output; a Sigma-Delta modulator which receives a Frequency Control Word (FCW) and which is connected to the programmable frequency divider to receive the modulated reference clock as a sample clock and to control an average frequency of the modulated reference clock; and an integer-N Phase Lock Loop (PLL) which receives the modulated reference clock and outputs a clock output.Type: ApplicationFiled: November 30, 2018Publication date: June 4, 2020Inventors: Sadok Aouini, Matthew Mikkelsen, Naim Ben-Hamida, Mahdi Parvizi, Tingjun Wen, Calvin Plett
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Patent number: 7825777Abstract: An integrated circuit comparator is provided that determines non-strict inequalities between operands applied thereto. Each comparator includes at least one n-bit comparator cell. This comparator cell is configured to determine a non-strict inequality between a first n-bit operand (e.g., A[n?1, . . . , 0]) and a second n-bit operand (e.g., B[n?1, . . . , 0]). The comparator cell determines the non-strict inequality by computing a control output signal Co (or its complement), where: C o = ( … ? ( ( C i ? ( A 0 + B 0 _ ) + A 0 ? B 0 _ ) ? ( A 1 + B 1 _ ) + A 1 ? B 1 _ ) ? … ? ( A n - 2 + B n - 2 _ ) + A n - 2 ? B n - 2 _ ) ? ( A n - 1 + B n - 1 _ ) + A n - 1 ? B n - 1 _ , “n” is a positive integer greater than one and Ci is a control input signal that specifies an interpretation to be given to the control output signal Co.Type: GrantFiled: March 30, 2006Date of Patent: November 2, 2010Assignee: Integrated Device Technology, Inc.Inventors: Tingjun Wen, David Walter Carr, Tadeusz Kwasniewski
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Patent number: 7822916Abstract: A search engine device includes a lookup circuit, such as a content addressable memory (CAM) array. This lookup circuit is configured to generate multiple active match signals in response to detecting multiple matches between a search operand applied to said lookup circuit and multiple entries therein, during a search operation. A priority sequencer circuit is also provided. This priority sequencer circuit, which is electrically coupled to outputs of the lookup circuit, is configured to sequentially encode each of the multiple active match signals according to priority.Type: GrantFiled: October 31, 2006Date of Patent: October 26, 2010Assignee: NetLogic Microsystems, Inc.Inventor: Tingjun Wen
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Patent number: 7355890Abstract: Content addressable memory (CAM) devices have CAM cells therein that are electrically coupled to a NAND-type compare circuit. This NAND-type compare circuit is responsive to a first operand (K) containing true and complementary bits of an applied search key and a second operand (D) containing true and complementary bits of a stored search word. The NAND-type compare circuit includes a first string of transistors connected end-to-end in series from a first terminal to a second terminal and a second string of transistors connected end-to-end in series from the first terminal to the second terminal. This first string of transistors has gate terminals responsive to the first operand and the second string of transistors has gate terminals responsive to the second operand.Type: GrantFiled: October 26, 2006Date of Patent: April 8, 2008Assignee: Integrated Device Technology, Inc.Inventor: Tingjun Wen
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Patent number: 7298636Abstract: A multi-functional match cell is responsive to first and second n-bit operands and configured so that the match cell operates as an n-bit range match cell when the first and second n-bit operands are equivalent, as an n-bit NOR-type CAM cell when the second n-bit operand is masked and as an n-bit NAND-type CAM cell when the first n-bit operand is masked, where “n” is a positive integer greater than one.Type: GrantFiled: March 30, 2006Date of Patent: November 20, 2007Assignee: Integrated Device Technology, Inc.Inventors: Tingjun Wen, Tadeusz Kwasniewski