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Shuliang A Li

from Mukilteo, WA
Age ~56
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Also known as:
Shuliang L Li, Ling Su Li, Li A Shuliang
Related to:
Jiangning Li, 56Shan Li, 45Li YidaYu ChenOlga GaliotoAmanda Li, 68
Connected to:
Adeline Li, 32Agatha K Li, 48Aiping Li, 33Aiyi Li, 36Andi Li, 34Andre N Li, 27Anyun Li, 34Banny Li, 51Baozhen Li, 67Beatrice O Li, 68

Shuliang Li Phones & Addresses

  • Mukilteo, WA
  • Everett, WA
  • 14612 24Th Ave W, Lynnwood, WA 98087 (425) 787-3069
  • 4200 Mary Gates Memorial Dr, Seattle, WA 98105 (206) 522-9223
  • 6119 Radford Ave, Seattle, WA 98115 (206) 522-9223
  • 12549 28Th St, Seattle, WA 98125 (206) 366-4641
  • Snohomish, WA
  • 12549 28Th Ave NE, Seattle, WA 98125 (206) 947-1347

Work

Position: Service Occupations

Education

Degree: High school graduate or higher

Resumes

Resumes

Shuliang Li Photo 1

Senior Staff Design Engineer

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Location:
10225 64Th Pl, Mukilteo, WA 98275
Industry:
Semiconductors
Work:
Cypress Semiconductor Corporation
Senior Staff Design Engineer
Institute of Engineering Thermophysics Chinese Academy of Science Beijing China Oct 1995 - Jun 1997
Assistant Researcher
Education:
University of Washington 1998 - 2000
Master of Science, Masters, Electrical Engineering Tsinghua University 1987 - 1992
Skills:
Engineering
Science
Design
Chinese
Shuliang Li Photo 2

Shuliang Li

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Publications

Us Patents

Frequency Synthesizer Having A More Versatile And Efficient Fractional-N Control Circuit And Method

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US Patent:
7126436, Oct 24, 2006
Filed:
Sep 22, 2004
Appl. No.:
10/947519
Inventors:
Shuliang Li - Lynnwood WA, US
Assignee:
Cypress Semiconductor Corp. - San Jose CA
International Classification:
H03M 3/00
US Classification:
332127, 341143
Abstract:
A frequency synthesizer is provided having a fractional-N control circuit and method that can selectively apply any fractional ratio to a frequency divider within the feedback loop of a PLL. A special digital delta-sigma modulator can be implemented as the control circuit and can receive any arbitrary numerator and denominator value, or their arithmetic combination, or a positive and negative vector values used by the modulator to achieve an average fractional division. Both the numerator and denominator (or the positive and negative vectors) can be chosen based on any integer value to achieve a more optimal, higher frequency resolution and efficient fractional-N control circuit and methodology thereof.

Frequency Modulator, Circuit, And Method That Uses Multiple Vector Accumulation To Achieve Fractional-N Frequency Synthesis

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US Patent:
7405629, Jul 29, 2008
Filed:
Jun 30, 2005
Appl. No.:
11/172691
Inventors:
Shuliang Li - Lynnwood WA, US
Assignee:
Cypress Semiconductor Corp. - San Jose CA
International Classification:
H03M 3/02
US Classification:
331 16, 327157, 341143
Abstract:
A frequency synthesizer is provided having a fractional-N control circuit and method. The control circuit can operate as having a modulator that selectively applies any fractional ratio to a frequency divider within, for example, a feedback loop of a PLL. The modulator can be a delta-sigma modulator or any sequential state machine that can be implemented as the control circuit, and can select amongst a plurality of vector values. The vector values can be spaced relatively close to each other, and the incoming present vector values can each be added to a value chosen from the immediately preceding set of potential values. The selector circuit chooses from among the present set of vector values depending on whether the sum is nearest a target value. The sum nearest the target value is, therefore, selected as the present vector value, and the process is repeated in time for each vector value having a corresponding P value to form a pattern of P values sent to the divider of the PLL. The incoming frequency can therefore be synthesized based on the modulated P values used by the feedback divider to produce the appropriate fractional-N divide ratio for the synthesized frequency.

Spread Spectrum Frequency Synthesizer With Improved Frequency Shape By Adjusting The Length Of A Standard Curve Used For Spread Spectrum Modulation

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US Patent:
7701297, Apr 20, 2010
Filed:
Oct 30, 2006
Appl. No.:
11/590483
Inventors:
Shuliang Li - Lynnwood WA, US
Assignee:
Cypress Semiconductor Corporation - San Jose CA
International Classification:
H03L 7/18
US Classification:
331 16, 331 23, 375376
Abstract:
A frequency synthesizer is described illustrating a method for modulation having improved frequency shape for spread spectrum modulation. In particular, the a standard curve is generated, wherein the standard curve modulates an input signal to generate a spread spectrum of frequencies with reduced amplitude and spreading of bandwidth. The standard curve is sampled at a sampling frequency. The length of the standard curve is adjusted such that critical points of the standard curve are captured.

System And Method For An Enhanced Noise Shaping For Spread Spectrum Modulation

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US Patent:
7741918, Jun 22, 2010
Filed:
Oct 30, 2006
Appl. No.:
11/590287
Inventors:
Shuliang Li - Lynnwood WA, US
Assignee:
Cypress Semiconductor Corporation - San Jose CA
International Classification:
H03B 29/00
H03L 7/18
US Classification:
331 16, 331 1 A, 331 78
Abstract:
A frequency synthesizer is described. In particular, the frequency synthesizer includes a modulator circuit for producing a signal of modulated frequency. The frequency synthesizer includes an accumulator for summing a plurality of errors in the modulator circuit. An error sum value is generated. More particularly, the accumulator increases the rate of sign change of the plurality of errors. An error signal modulator is coupled to the accumulator and modulates an index that is associated with a current error based on the error sum value. The index that is modulated is used for selecting a feedback loop divider count value used for dividing a frequency of the signal. As a result, the error noise around a target signal shows an increased sign change of error, which moves the error noise to higher frequencies. This improves EMI performance.

Spread Spectrum Frequency Synthesizer With High Order Accumulation For Frequency Profile Generation

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US Patent:
7813411, Oct 12, 2010
Filed:
Oct 30, 2006
Appl. No.:
11/590149
Inventors:
Shuliang Li - Lynnwood WA, US
Assignee:
Cypress Semiconductor Corporation - San Jose CA
International Classification:
H04B 1/00
US Classification:
375130, 375146, 375376
Abstract:
A frequency synthesizer is described illustrating a system and method for modulation. In particular, the frequency synthesizer includes a control circuit for producing a plurality of input signals that is scalable to a frequency profile. Each of the input signals includes a slope and a direction of the slope. A higher order accumulator block is coupled to the control circuit and receives the plurality of input signals. The higher order accumulator block includes at least two accumulators. The higher order accumulator block sums the plurality of input signals to generate a standard curve that is non-linear. A frequency spreading control pattern generation modulator is coupled to the higher order accumulator block and modulates the standard curve to generate the desired frequency profile.

Spread Spectrum Frequency Synthesizer With First Order Accumulation For Frequency Profile Generation

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US Patent:
7912109, Mar 22, 2011
Filed:
Oct 30, 2006
Appl. No.:
11/590433
Inventors:
Shuliang Li - Lynnwood WA, US
Assignee:
Cypress Semiconductor Corporation - San Jose CA
International Classification:
H04B 1/00
US Classification:
375130, 375136, 375376
Abstract:
A frequency synthesizer is described illustrating a system and method for modulation. In particular, the frequency synthesizer includes a control circuit for producing a plurality of input signals that is scalable to a frequency profile. Each of the input signals includes a slope and a direction of the slope. An accumulator is coupled to the control circuit and receives the plurality of input signals. The accumulator sums the plurality of input signals to generate a standard curve. A frequency spreading control pattern generation modulator is coupled to the accumulator and modulates the standard curve to generate the desired frequency profile.

Phase Lock Loop Control System And Method

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US Patent:
7932787, Apr 26, 2011
Filed:
Oct 30, 2006
Appl. No.:
11/590385
Inventors:
Shuliang Li - Lynnwood WA, US
Assignee:
Cypress Semiconductor Corporation - San Jose CA
International Classification:
H03B 29/00
US Classification:
331 78, 327117, 375132
Abstract:
A phase-locked loop control system and method are described. Present invention phase-locked loop control systems and methods facilitate control of phase-lock loop operations. In one embodiment, phase-lock loop control systems and methods are utilized in the implementation of a modulated frequency synthesizer for facilitating efficient frequency spreading over a designated spectrum. It is appreciated that present invention embodiments can have a variety of implementations and can be compatible with vector accumulation. For example, a phase-locked loop control system or method can facilitate generation of a variety of modulation patterns, including but not necessarily limited to linear or non-linear modulation, standard or non-standard modulation, etc.

Simplified Phase Lock Loop Control Model System And Method

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US Patent:
7948327, May 24, 2011
Filed:
Oct 30, 2006
Appl. No.:
11/590078
Inventors:
Shuliang Li - Lynnwood WA, US
Assignee:
Cypress Semiconductor Corporation - San Jose CA
International Classification:
H03B 29/00
US Classification:
331 78, 375132, 327117
Abstract:
A phase-locked loop control system and method are described. Present invention phase-locked loop control systems and methods facilitate control of phase-lock loop operations. In one embodiment, phase-lock loop control systems and methods are utilized in the implementation of a modulated frequency synthesizer for facilitating efficient frequency spreading over a designated spectrum. It is appreciated that present invention embodiments can have a variety of implementations and can be compatible with vector accumulation. For example, a phase-locked loop control system or method can facilitate generation of a variety of modulation patterns, including but not necessarily limited to linear or non-linear modulation, standard or non-standard modulation, etc.
Control profile
Shuliang A Li from Mukilteo, WA, age ~56 Get Report