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公开(公告)号：US10530618B1
公开(公告)日：2020-01-07
申请号：US16143198
申请日：2018-09-26
Applicant: QUALCOMM Incorporated
Inventor： Joung Won Park , Ehab Abdel Ghany , Li-chung Chang
Abstract: This disclosure provides systems and apparatuses for converting a single-ended analog signal into a differential analog signal. In some implementations, a single-ended to differential signal converter may include an N-path filter to generate a 180 degree phase-shifted version of a single-ended input signal. The single-ended input signal and the 180 degree phase-shifted version of the single-ended input signal together may form a differential signal. In some implementations, the N-path filter may delay the single-ended input through a series of switched capacitors.
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公开(公告)号：US11228292B2
公开(公告)日：2022-01-18
申请号：US16560660
申请日：2019-09-04
Applicant: Qualcomm Incorporated
Inventor： Rahul Karmaker , Conor Donovan , Li-chung Chang
Abstract: An apparatus is disclosed for processing a signal with a divided amplifier. In example implementations, an apparatus includes a first portion of an amplifier, a first port interface, a second port interface, and a switch matrix. The first port interface includes a first transformer; a second portion of the amplifier, which is coupled to the first transformer; and a first switch component that is coupled to at least one of the first transformer or the second portion of the amplifier. The second port interface includes a second transformer and a second switch component that is coupled to the second transformer. The switch matrix is coupled between the first switch component and the first portion of the amplifier and between the second switch component and the first portion of the amplifier. The switch matrix is also coupled between the second portion of the amplifier and the first portion of the amplifier.
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公开(公告)号：US11736078B2
公开(公告)日：2023-08-22
申请号：US17176543
申请日：2021-02-16
Applicant: QUALCOMM Incorporated
Inventor： Joung Won Park , Wei Zhuo , Li-chung Chang
CPC classification number: H03F3/45098 , H03F1/26 , H03F1/3211 , H03F3/19 , H03F2200/451
Abstract: Certain aspects of the present disclosure provide methods and apparatus for amplifying an input signal. One example apparatus is a differential amplifier that includes a positive input node, a negative input node, a positive output node, a negative output node, a positive input transistor having a gate coupled to the positive input node and having a drain coupled to the negative output node, a negative input transistor having a gate coupled to the negative input node and having a drain coupled to the positive output node, a first common-gate amplifier having an output coupled to the negative output node, a second common-gate amplifier having an output coupled to the positive output node, a first capacitive element coupled between the negative input node and an input of the first common-gate amplifier, and a second capacitive element coupled between the positive input node and an input of the second common-gate amplifier.
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公开(公告)号：US10566937B2
公开(公告)日：2020-02-18
申请号：US15583636
申请日：2017-05-01
Applicant: QUALCOMM Incorporated
Inventor： Mohammad Sadegh Mehrjoo , Chuan Wang , Yanming Xiao , Li-chung Chang , Kevin Hsi Huai Wang
Abstract: A low noise amplifier may include a post distortion cancellation block coupled to the low noise amplifier. The post distortion cancellation block may include a diode, and phase-shift logic. The phase-shift logic may be coupled in series with the diode.
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Patent Agency Ranking
公开(公告)号：US20210067115A1
公开(公告)日：2021-03-04
申请号：US16560660
申请日：2019-09-04
Applicant: Qualcomm Incorporated
Inventor： Rahul Karmaker , Conor Donovan , Li-chung Chang
Abstract: An apparatus is disclosed for processing a signal with a divided amplifier. In example implementations, an apparatus includes a first portion of an amplifier, a first port interface, a second port interface, and a switch matrix. The first port interface includes a first transformer; a second portion of the amplifier, which is coupled to the first transformer; and a first switch component that is coupled to at least one of the first transformer or the second portion of the amplifier. The second port interface includes a second transformer and a second switch component that is coupled to the second transformer. The switch matrix is coupled between the first switch component and the first portion of the amplifier and between the second switch component and the first portion of the amplifier. The switch matrix is also coupled between the second portion of the amplifier and the first portion of the amplifier.
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公开(公告)号：US10547289B2
公开(公告)日：2020-01-28
申请号：US15963056
申请日：2018-04-25
Applicant: QUALCOMM Incorporated
Inventor： Joung Won Park , Li-chung Chang , Faramarz Sabouri
Abstract: An N-path filter with one or more branches selectively coupled to a shared circuit node includes a first branch having a first feedback path and a second feedback path. The first feedback path includes a Miller amplifier having an input coupled to an input voltage and a first capacitor coupled to both the input voltage and an output of the Miller amplifier. The second feedback path includes a node in common with the first feedback path. The second feedback path also includes a first high pass filter coupled to the output of the Miller amplifier and a second capacitor coupled to both the first capacitor and the first high pass filter.
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公开(公告)号：US10541654B1
公开(公告)日：2020-01-21
申请号：US16030658
申请日：2018-07-09
Applicant: Qualcomm Incorporated
Inventor： Makar Snai , Ehab Abdel Ghany , Manohar Seetharam , Li-chung Chang
Abstract: Amplification with post-distortion compensation is disclosed. In an example aspect, an apparatus includes a voltage rail and a cascode amplifier. The cascode amplifier includes an amplification node, a cascode node, and a common-source node. The cascode amplifier also includes at least one cascode transistor, an input transistor, and a compensation transistor. The cascode transistor is coupled between the amplification node and the cascode node. The input transistor is coupled between the cascode node and the common-source node. The compensation transistor is coupled between the voltage rail and the cascode node.
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公开(公告)号：US20200014340A1
公开(公告)日：2020-01-09
申请号：US16030658
申请日：2018-07-09
Applicant: Qualcomm Incorporated
Inventor： Makar Snai , Ehab Abdel Ghany , Manohar Seetharam , Li-chung Chang
Abstract: Amplification with post-distortion compensation is disclosed. In an example aspect, an apparatus includes a voltage rail and a cascode amplifier. The cascode amplifier includes an amplification node, a cascode node, and a common-source node. The cascode amplifier also includes at least one cascode transistor, an input transistor, and a compensation transistor. The cascode transistor is coupled between the amplification node and the cascode node. The input transistor is coupled between the cascode node and the common-source node. The compensation transistor is coupled between the voltage rail and the cascode node.
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公开(公告)号：US10008987B1
公开(公告)日：2018-06-26
申请号：US15583944
申请日：2017-05-01
Applicant: QUALCOMM Incorporated
Inventor： Serkan Sayilir , Chuan Wang , Li-chung Chang , Kevin Hsi Huai Wang
Abstract: A low noise amplifier (LNA) reduces matching and switch noise. The LNA includes a main radio frequency signal path, an auxiliary radio frequency signal path and a phase shifter. The main path includes a first transistor and an inductor. The inductor is positioned between an input port of the LNA and the first transistor. The first transistor receives an input radio frequency signal via the inductor and provides a first amplified signal based on the input radio frequency signal. The auxiliary radio frequency signal path provides a second amplified signal for a noise cancellation mode based on the input radio frequency signal. The phase shifter applies a phase shift to an output signal of the LNA based on the first amplified signal and the second amplified signal.
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