Patents by Inventor Hann-Wen Lin
Hann-Wen Lin 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: 7898222Abstract: The present invention relates to battery chargers. A first controller can be configured to set, when a first power supply is coupled to a first port, a current produced by a variable current source at a safe rate to charge a battery. An ammeter can be configured to measure, when the battery is coupled to a second port, the current flowing into the battery. The first controller can be configured to increase, after a passing of a quantifiable amount of time, the current produced by the variable current source by a quantifiable amount of current. The first controller can be configured to continue iteratively to increase, after the passing of the quantifiable amount of time, the current produced by the variable current source by the quantifiable amount of current until the safe rate is near or at a highest safe rate to charge the battery.Type: GrantFiled: March 29, 2010Date of Patent: March 1, 2011Assignee: Broadcom CorporationInventors: Chun-Sheng Huang, Hann-Wen Lin
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Patent number: 7884656Abstract: A phase locked loop (PLL) includes a frequency detector and a type 1 PLL including a phase detector. The phase detector produces a phase error signal indicative of a difference in phase between a reference signal and a feedback signal, while the frequency detector produces a frequency error signal indicative of a difference in frequency between the reference signal and the feedback signal. Logic switches between the phase detector and the frequency detector based on the frequency error signal.Type: GrantFiled: June 29, 2009Date of Patent: February 8, 2011Assignee: Broadcom CorporationInventor: Maco (Hann-Wen) Lin
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Publication number: 20100181967Abstract: The present invention relates to battery chargers. A first controller can be configured to set, when a first power supply is coupled to a first port, a current produced by a variable current source at a safe rate to charge a battery. An ammeter can be configured to measure, when the battery is coupled to a second port, the current flowing into the battery. The first controller can be configured to increase, after a passing of a quantifiable amount of time, the current produced by the variable current source by a quantifiable amount of current. The first controller can be configured to continue iteratively to increase, after the passing of the quantifiable amount of time, the current produced by the variable current source by the quantifiable amount of current until the safe rate is near or at a highest safe rate to charge the battery.Type: ApplicationFiled: March 29, 2010Publication date: July 22, 2010Applicant: Broadcom CorporationInventors: Chun-Sheng Huang, Hann-Wen Lin
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Patent number: 7696726Abstract: The present invention relates to battery chargers. A first controller can be configured to set, when a first power supply is coupled to a first port, a current produced by a variable current source at a safe rate to charge a battery. An ammeter can be configured to measure, when the battery is coupled to a second port, the current flowing into the battery. The first controller can be configured to increase, after a passing of a quantifiable amount of time, the current produced by the variable current source by a quantifiable amount of current. The first controller can be configured to continue iteratively to increase, after the passing of the quantifiable amount of time, the current produced by the variable current source by the quantifiable amount of current until the safe rate is near or at a highest safe rate to charge the battery.Type: GrantFiled: October 12, 2006Date of Patent: April 13, 2010Assignee: Broadcom CorporationInventors: Chun-Sheng Huang, Hann-Wen Lin
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Publication number: 20090261874Abstract: A phase locked loop (PLL) includes a frequency detector and a type 1 PLL including a phase detector. The phase detector produces a phase error signal indicative of a difference in phase between a reference signal and a feedback signal, while the frequency detector produces a frequency error signal indicative of a difference in frequency between the reference signal and the feedback signal. Logic switches between the phase detector and the frequency detector based on the frequency error signal.Type: ApplicationFiled: June 29, 2009Publication date: October 22, 2009Applicant: BROADCOM CORPORATIONInventor: Maco Hann-Wen Lin
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Patent number: 7564280Abstract: A phase locked loop (PLL) with small size and improved performance is achieved using a type 1 PLL, a frequency detector and logic for switching between the type 1 PLL and frequency detector. The logic disables the type 1 PLL and enables the frequency detector to bring the frequency of a PLL output signal to within a frequency locking range of the type 1 PLL, and then disables the frequency detector and enables the type 1 PLL to lock the phase of the PLL output signal.Type: GrantFiled: December 11, 2006Date of Patent: July 21, 2009Assignee: Broadcom CorporationInventor: Hann-Wen Lin
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Publication number: 20080129353Abstract: A phase locked loop (PLL) with small size and improved performance is achieved using a type 1 PLL, a frequency detector and logic for switching between the type 1 PLL and frequency detector. The logic disables the type 1 PLL and enables the frequency detector to bring the frequency of a PLL output signal to within a frequency locking range of the type 1 PLL, and then disables the frequency detector and enables the type 1 PLL to lock the phase of the PLL output signal.Type: ApplicationFiled: December 11, 2006Publication date: June 5, 2008Applicant: BROADCOM CORPORATIONInventor: Maco (Hann-Wen) Lin
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Publication number: 20080007213Abstract: The present invention relates to battery chargers. A first controller can be configured to set, when a first power supply is coupled to a first port, a current produced by a variable current source at a safe rate to charge a battery. An ammeter can be configured to measure, when the battery is coupled to a second port, the current flowing into the battery. The first controller can be configured to increase, after a passing of a quantifiable amount of time, the current produced by the variable current source by a quantifiable amount of current. The first controller can be configured to continue iteratively to increase, after the passing of the quantifiable amount of time, the current produced by the variable current source by the quantifiable amount of current until the safe rate is near or at a highest safe rate to charge the battery.Type: ApplicationFiled: October 12, 2006Publication date: January 10, 2008Applicant: Broadcom CorporationInventors: Chun-Sheng Huang, Hann-Wen Lin
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Publication number: 20050001688Abstract: The present invention relates to a system and an device for calibrating oscillator characteristic curve, more particularly, to a system and device that are capable of making an evaluation to determine whether it is necessary to change the characteristic curve of the oscillator by means of a calibration device; if so, the device will send a calibration signal to a calibration circuit for changing the circuit characteristic thereof so as to choose an appropriate characteristic curve of the oscillator. The present invention can calibrate the frequency characteristic curve of the oscillator automatically so as to avoid being affected by the manufacture process and temperature. Furthermore, the manual adjustment is no longer required before every shipping that not only can reduce the uncertainty caused by manual adjustment, but also can reduce labor cost.Type: ApplicationFiled: March 8, 2004Publication date: January 6, 2005Inventor: Hann-Wen Lin