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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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Patent Agency Ranking
公开(公告)号：US10608601B2
公开(公告)日：2020-03-31
申请号：US15609951
申请日：2017-05-31
Applicant: QUALCOMM Incorporated
Inventor： Rahul Karmaker , Gary Lee Brown, Jr.
Abstract: Certain aspects of the present disclosure are generally directed to a tunable active filter and a method of calibrating a tunable active filter. One example apparatus is a filter circuit that generally includes a resistor-capacitor (RC) topology tunable active filter comprising a first amplifier, a second amplifier, and a feedback path coupled between an input of the first amplifier and an output of the second amplifier. The filter circuit also includes a negative transconductance circuit coupled to a first node of the tunable active filter.
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公开(公告)号：US10374554B2
公开(公告)日：2019-08-06
申请号：US15855106
申请日：2017-12-27
Applicant: QUALCOMM Incorporated
Inventor： Rahul Karmaker , Bin Fan
Abstract: Certain aspects of the present disclosure generally relate to a differential amplifier implemented using a complementary metal-oxide-semiconductor (CMOS) structure. The differential amplifier generally includes a first pair of transistors and a second pair of transistors coupled to the first pair of transistors. The gates of the first pair of transistors and gates of the second pair of transistors may be coupled to respective differential input nodes of the differential amplifier, and drains of the first pair of transistors and drains of the second pair of transistors may be coupled to respective differential output nodes of the differential amplifier. In certain aspects, the differential amplifier may include a biasing transistor having a drain coupled to a source of a transistor of the first pair of transistors and having a gate coupled to a common-mode feedback (CMFB) path of the differential amplifier.
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公开(公告)号：US09660585B2
公开(公告)日：2017-05-23
申请号：US14742351
申请日：2015-06-17
Applicant: QUALCOMM Incorporated
Inventor： Ayush Mittal , Gireesh Rajendran , Rahul Karmaker
CPC classification number: H03F1/0205 , H03F3/19 , H03F3/211 , H03F3/245 , H03F3/3022 , H03F3/45192 , H03F3/45219 , H03F3/45654 , H03F2200/294 , H03F2200/451 , H03F2203/21106 , H03F2203/30015 , H03F2203/45008 , H03F2203/45134
Abstract: A class AB amplifier may include an input stage, a first folded cascode stage, a second folded cascode stage, and a class AB output stage. In some embodiments, the class AB output stage may provide differential output signals. The common-mode voltage of the differential output signals may be controlled via a correction signal coupled to a selected folded cascode stage. The correction signal may control the common-mode voltage of the differential output signals by altering bias currents within the selected folded cascode stage. The other cascode stage may include bias currents controlled by relatively fixed bias voltages.
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公开(公告)号：US09385672B2
公开(公告)日：2016-07-05
申请号：US14553688
申请日：2014-11-25
Applicant: QUALCOMM Incorporated
Inventor： Rahul Karmaker
CPC classification number: H03F3/45645 , H03F1/086 , H03F1/223 , H03F1/42 , H03F3/19 , H03F3/245 , H03F3/45188 , H03F3/45475 , H03F2200/411 , H03F2200/451 , H03F2203/45051 , H03F2203/45062 , H03F2203/45066 , H03F2203/45116 , H03F2203/45151 , H03F2203/45156 , H03F2203/45404 , H03F2203/45422 , H03F2203/45631 , H03F2203/45718
Abstract: A common-mode feedback module is disclosed for controlling feedback in an amplifier, such as a multi-stage amplifier. The common-mode feedback module may include a feedback input stage, a cascode stage, and a feedback output stage. The common-mode feedback module may provide feedback, such as negative feedback to the amplifier to extend a bandwidth of a frequency response and/or increase stability.
Abstract translation: 公开了一种用于控制诸如多级放大器之类的放大器中的反馈的共模反馈模块。 共模反馈模块可以包括反馈输入级，共源共栅级和反馈输出级。 共模反馈模块可以向放大器提供诸如负反馈的反馈以扩展频率响应的带宽和/或增加稳定性。
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公开(公告)号：US20160149546A1
公开(公告)日：2016-05-26
申请号：US14553688
申请日：2014-11-25
Applicant: QUALCOMM Incorporated
Inventor： Rahul Karmaker
CPC classification number: H03F3/45645 , H03F1/086 , H03F1/223 , H03F1/42 , H03F3/19 , H03F3/245 , H03F3/45188 , H03F3/45475 , H03F2200/411 , H03F2200/451 , H03F2203/45051 , H03F2203/45062 , H03F2203/45066 , H03F2203/45116 , H03F2203/45151 , H03F2203/45156 , H03F2203/45404 , H03F2203/45422 , H03F2203/45631 , H03F2203/45718
Abstract: A common-mode feedback module is disclosed for controlling feedback in an amplifier, such as a multi-stage amplifier. The common-mode feedback module may include a feedback input stage, a cascode stage, and a feedback output stage. The common-mode feedback module may provide feedback, such as negative feedback to the amplifier to extend a bandwidth of a frequency response and/or increase stability.
Abstract translation: 公开了一种用于控制诸如多级放大器之类的放大器中的反馈的共模反馈模块。 共模反馈模块可以包括反馈输入级，共源共栅级和反馈输出级。 共模反馈模块可以向放大器提供诸如负反馈的反馈以扩展频率响应的带宽和/或增加稳定性。
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