Patents by Inventor Wenkai Zhong
Wenkai Zhong 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: 10924145Abstract: A radiofrequency (RF) power regulator includes a forward RF power detection circuit to detect forward RF power supplied by an RF transmitter circuit to an RF transmitting antenna. An RF power sampler is coupled to the forward RF power detector circuit and provides RF power samples of the supplied forward RF power. Multiple filters are coupled to receive the RF power samples. Each filter differently filters the received forward power samples to apply a different average power period. Each filter activates an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter. Forward RF power adjustment logic is coupled to filters and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal.Type: GrantFiled: January 8, 2019Date of Patent: February 16, 2021Assignee: Microsoft Technology Licensing, LLCInventors: Sean Russell Mercer, Charbel Khawand, Wenkai Zhong
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Publication number: 20190253095Abstract: A radiofrequency (RF) power regulator includes a forward RF power detection circuit to detect forward RF power supplied by an RF transmitter circuit to an RF transmitting antenna. An RF power sampler is coupled to the forward RF power detector circuit and provides RF power samples of the supplied forward RF power. Multiple filters are coupled to receive the RF power samples. Each filter differently filters the received forward power samples to apply a different average power period. Each filter activates an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter. Forward RF power adjustment logic is coupled to filters and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal.Type: ApplicationFiled: January 8, 2019Publication date: August 15, 2019Inventors: Sean Russell Mercer, Charbel Khawand, Wenkai Zhong
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Patent number: 10224974Abstract: A radiofrequency (RF) power regulator includes a forward RF power detection circuit to detect forward RF power supplied by an RF transmitter circuit to an RF transmitting antenna. An RF power sampler is coupled to the forward RF power detector circuit and provides RF power samples of the supplied forward RF power. Multiple filters are coupled to receive the RF power samples. Each filter differently filters the received forward power samples to apply a different average power period. Each filter activates an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter. Forward RF power adjustment logic is coupled to filters and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal.Type: GrantFiled: August 11, 2017Date of Patent: March 5, 2019Assignee: Microsoft Technology Licensing, LLCInventors: Sean Russell Mercer, Charbel Khawand, Wenkai Zhong
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Publication number: 20180287650Abstract: A radiofrequency (RF) power regulator includes a forward RF power detection circuit to detect forward RF power supplied by an RF transmitter circuit to an RF transmitting antenna. An RF power sampler is coupled to the forward RF power detector circuit and provides RF power samples of the supplied forward RF power. Multiple filters are coupled to receive the RF power samples. Each filter differently filters the received forward power samples to apply a different average power period. Each filter activates an RF power adjustment trigger signal while a time-averaged forward RF power supplied to the RF transmitting antenna satisfies a forward RF power adjustment condition for the average power period of the filter. Forward RF power adjustment logic is coupled to filters and operable to adjust the forward RF power supplied by the RF transmitter circuit to the RF transmitting antenna based on the RF power adjustment trigger signal.Type: ApplicationFiled: August 11, 2017Publication date: October 4, 2018Inventors: Sean Russell Mercer, Charbel Khawand, Wenkai Zhong
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Patent number: 10078103Abstract: The described technology includes an apparatus comprising a proximity sensor pad and booster element located between an antenna and the proximity sensor pad, wherein voltage level of the booster element at least ten percent higher than voltage level of the proximity sensor pad. Implementations of the booster element may be made of metal or metal-ink and may have U-shape or L-shape.Type: GrantFiled: August 26, 2016Date of Patent: September 18, 2018Assignee: Microsoft Technology Licensing, LLCInventors: Wenkai Zhong, Sean R. Mercer
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Publication number: 20180059158Abstract: The described technology includes an apparatus comprising a proximity sensor pad and booster element located between an antenna and the proximity sensor pad, wherein voltage level of the booster element at least ten percent higher than voltage level of the proximity sensor pad. Implementations of the booster element may be made of metal or metal-ink and may have U-shape or L-shape.Type: ApplicationFiled: August 26, 2016Publication date: March 1, 2018Inventors: Wenkai Zhong, Sean R. Mercer
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Publication number: 20060030287Abstract: A receiver with reduced near field noise is described. The receiver has a far range receiving section configured to sense a desired signal that includes near field noise. The receiver further includes a near range receiving section configured to sense a near field noise reference signal. An adaptive noise canceller (ANC) of the receiver is configured to detect the magnitude of an error vector from the far range receiving section. The ANC is configured to adjust the phase and gain of the near field noise reference signal in response to the magnitude of the error. Accordingly, the ANC can generate a corrected near field noise reference signal that is added to the desired signal with an adder. The near field noise is canceled by the addition of the corrected near field noise signal. The ANC uses a least mean square technique to determine the amount of correction needed.Type: ApplicationFiled: October 3, 2005Publication date: February 9, 2006Inventors: Ronald Vanderhelm, Wenkai Zhong, Peter McConnell
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Patent number: 6968171Abstract: A receiver with reduced near field noise is described. The receiver has a far range receiving section configured to sense a desired signal that includes near field noise. The receiver further includes a near range receiving section configured to sense a near field noise reference signal. An adaptive noise canceller (ANC) of the receiver is configured to detect the magnitude of an error vector from the far range receiving section. The ANC is configured to adjust the phase and gain of the near field noise reference signal in response to the magnitude of the error. Accordingly, the ANC can generate a corrected near field noise reference signal that is added to the desired signal with an adder. The near field noise is canceled by the addition of the corrected near field noise signal. The ANC uses a least mean square technique to determine the amount of correction needed.Type: GrantFiled: June 4, 2002Date of Patent: November 22, 2005Assignee: Sierra Wireless, Inc.Inventors: Ronald John Vanderhelm, Wenkai Zhong, Peter R. H. McConnell
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Publication number: 20030224751Abstract: A receiver with reduced near field noise is described. The receiver has a far range receiving section configured to sense a desired signal that includes near field noise. The receiver further includes a near range receiving section configured to sense a near field noise reference signal. An adaptive noise canceller (ANC) of the receiver is configured to detect the magnitude of an error vector from the far range receiving section. The ANC is configured to adjust the phase and gain of the near field noise reference signal in response to the magnitude of the error. Accordingly, the ANC can generate a corrected near field noise reference signal that is added to the desired signal with an adder. The near field noise is canceled by the addition of the corrected near field noise signal. The ANC uses a least mean square technique to determine the amount of correction needed.Type: ApplicationFiled: June 4, 2002Publication date: December 4, 2003Applicant: Sierra Wireless, Inc.Inventors: Ronald John Vanderhelm, Wenkai Zhong, Peter R.H. McConnell
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Publication number: 20020140511Abstract: A system for removing noise in a power amplifier is disclosed. The system includes a pre-bias signal generator that is operative to generate a pre-bias signal and an injection mechanism that is operative to introduce the pre-bias signal into a control signal of the power amplifier. The pre-bias signal generator and the injection mechanism may be part of a current sense automatic level control loop for the power amplifier. In this respect, the control signal may be generated in response to the current flowing through the power amplifier. The pre-bias signal may be a DC offset voltage which is operative to place the power amplifier near a conducting threshold thereof in order to reduce sideband splatter.Type: ApplicationFiled: March 30, 2001Publication date: October 3, 2002Inventors: Markus Myers, Wenkai Zhong