Patents by Inventor Jiann-Chyi (Sam) Shieh
Jiann-Chyi (Sam) Shieh 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: 20150071318Abstract: A driving method of a laser diode includes setting a bias current, a modulation current, a first target corresponding to a predetermined average power, and a second target corresponding to a predetermined average modulation power; executing a first adjusting current step group; generating a temporary modulation current according to the modulation current; executing a second adjusting current step group; and executing the first adjusting current step group again.Type: ApplicationFiled: September 5, 2014Publication date: March 12, 2015Inventors: Ren-Bang Yeh, Jiann-Chyi Sam Shieh, Chih-Yang Wang
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Patent number: 8976828Abstract: A driving method of a laser diode includes setting a bias current, a modulation current, a first target corresponding to a predetermined average power, and a second target corresponding to a predetermined average modulation power; executing a first adjusting current step group; generating a temporary modulation current according to the modulation current; executing a second adjusting current step group; and executing the first adjusting current step group again.Type: GrantFiled: September 5, 2014Date of Patent: March 10, 2015Assignees: Etron Technology, Inc., TM Technology Inc.Inventors: Ren-Bang Yeh, Jiann-Chyi Sam Shieh, Chih-Yang Wang
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Patent number: 8373473Abstract: A dual-loop phase lock loop includes a phase frequency detector, a first charge pump, a second charge pump, a first capacitor, a filter, a first adder, a voltage controlled delay line, and a frequency divider. The phase frequency detector is used for outputting a switch signal according to a reference clock and a divided feedback clock. The first charge pump and the first capacitor are used for generating a coarse control voltage according to the switch signal. The second charge pump, the filter, and the first adder are used for generating a fine control voltage according to the switch signal and the coarse control voltage. The voltage controlled delay line is used for outputting a feedback clock according to the coarse control voltage and the fine control voltage. The frequency divider is used for dividing the feedback clock to output the divided feedback clock.Type: GrantFiled: July 7, 2011Date of Patent: February 12, 2013Assignee: Etron Technology, Inc.Inventors: Wei-Chuan Cheng, Jiann-Chyi Sam Shieh
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Publication number: 20120019294Abstract: A dual-loop phase lock loop includes a phase frequency detector, a first charge pump, a second charge pump, a first capacitor, a filter, a first adder, a voltage controlled delay line, and a frequency divider. The phase frequency detector is used for outputting a switch signal according to a reference clock and a divided feedback clock. The first charge pump and the first capacitor are used for generating a coarse control voltage according to the switch signal. The second charge pump, the filter, and the first adder are used for generating a fine control voltage according to the switch signal and the coarse control voltage. The voltage controlled delay line is used for outputting a feedback clock according to the coarse control voltage and the fine control voltage. The frequency divider is used for dividing the feedback clock to output the divided feedback clock.Type: ApplicationFiled: July 7, 2011Publication date: January 26, 2012Inventors: Wei-Chuan Cheng, Jiann-Chyi Sam Shieh
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Patent number: 6956436Abstract: A wide input range amplifier includes a first and second stage. The first stage has first and second inputs, first and second outputs, and first, second and third voltage sources. The first stage accepts input signals having a first common mode voltage range and outputs a first output signal having a second common mode voltage range and being amplified a first amount. The second stage has first and second inputs connected to the first and second outputs of the first stage, respectively. The second stage accepts input signals having a common mode voltage in the second range and outputs a second output signal having a third common mode voltage range and being amplified a second amount.Type: GrantFiled: March 19, 2004Date of Patent: October 18, 2005Assignee: Broadcom CorporationInventors: Ning Li, Jiann-Chyi Sam Shieh
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Patent number: 6867618Abstract: A differential driver includes a switching module and first and second voltage controlled voltage sources. The switching module has a plurality of switches each controlled by an input signal, a first voltage input and a second voltage input, and a signal output. The first voltage controlled voltage source is connected to the first voltage input. The first voltage controlled voltage source has a low impedance. The second voltage controlled voltage source is connected to the second voltage input. The second voltage controlled voltage source also has a low impedance. The switching circuit outputs an output signal having an output voltage and current controlled by the first and second voltage controlled voltage sources. The output signal is based upon the input signal.Type: GrantFiled: December 30, 2003Date of Patent: March 15, 2005Assignee: Broadcom CorporationInventors: Ning Li, Jiann-Chyi (Sam) Shieh
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Publication number: 20040174215Abstract: A wide input range amplifier includes a first and second stage. The first stage has first and second inputs, first and second outputs, and first, second and third voltage sources. The first stage accepts input signals having a first common mode voltage range and outputs a first output signal having a second common mode voltage range and being amplified a first amount. The second stage has first and second inputs connected to the first and second outputs of the first stage, respectively. The second stage accepts input signals having a common mode voltage in the second range and outputs a second output signal having a third common mode voltage range and being amplified a second amount.Type: ApplicationFiled: March 19, 2004Publication date: September 9, 2004Applicant: Broadcom CorporationInventors: Ning Li, Jiann-Chyi Sam Shieh
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Publication number: 20040150430Abstract: A differential driver includes a switching module and first and second voltage controlled voltage sources. The switching module has a plurality of switches each controlled by an input signal, a first voltage input and a second voltage input, and a signal output. The first voltage controlled voltage source is connected to the first voltage input. The first voltage controlled voltage source has a low impedance. The second voltage controlled voltage source is connected to the second voltage input. The second voltage controlled voltage source also has a low impedance. The switching circuit outputs an output signal having an output voltage and current controlled by the first and second voltage controlled voltage sources. The output signal is based upon the input signal.Type: ApplicationFiled: December 30, 2003Publication date: August 5, 2004Applicant: Broadcom CorporationInventors: Ning Li, Jiann-Chyi (Sam) Shieh
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Patent number: 6686772Abstract: A differential driver includes a switching module and first and second voltage controlled voltage sources. The switching module has a plurality of switches each controlled by an input signal, a first voltage input and a second voltage input, and a signal output. The first voltage controlled voltage source is connected to the first voltage input. The first voltage controlled voltage source has a low impedance. The second voltage controlled voltage source is connected to the second voltage input. The second voltage controlled voltage source also has a low impedance. The switching circuit outputs an output signal having an output voltage and current controlled by the first and second voltage controlled voltage sources. The output signal is based upon the input signal.Type: GrantFiled: February 28, 2002Date of Patent: February 3, 2004Assignee: Broadcom CorporationInventors: Ning Li, Jiann-Chyi (Sam) Shieh
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Publication number: 20030094977Abstract: A differential driver includes a switching module and first and second voltage controlled voltage sources. The switching module has a plurality of switches each controlled by an input signal, a first voltage input and a second voltage input, and a signal output. The first voltage controlled voltage source is connected to the first voltage input. The first voltage controlled voltage source has a low impedance. The second voltage controlled voltage source is connected to the second voltage input. The second voltage controlled voltage source also has a low impedance. The switching circuit outputs an output signal having an output voltage and current controlled by the first and second voltage controlled voltage sources. The output signal is based upon the input signal.Type: ApplicationFiled: February 28, 2002Publication date: May 22, 2003Applicant: Broadcom CorporationInventors: Ning Li, Jiann-Chyi (Sam) Shieh
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Publication number: 20030095003Abstract: A wide input range amplifier includes a first and second stage. The first stage has first and second inputs, first and second outputs, and first, second and third voltage sources. The first stage accepts input signals having a first common mode voltage range and outputs a first output signal having a second common mode voltage range and being amplified a first amount. The second stage has first and second inputs connected to the first and second outputs of the first stage, respectively. The second stage accepts input signals having a common mode voltage in the second range and outputs a second output signal having a third common mode voltage range and being amplified a second amount.Type: ApplicationFiled: March 20, 2002Publication date: May 22, 2003Applicant: Broadcom CorporationInventors: Ning Li, Jiann-Chyi Sam Shieh