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公开(公告)号:US10826546B2
公开(公告)日:2020-11-03
申请号:US16102900
申请日:2018-08-14
摘要: Switchless carrier aggregation. In some embodiments, a carrier aggregation circuit can include a first filter configured to allow operation in a first frequency band, and a second filter configured to allow operation in a second frequency band. The circuit can further include a first signal path implemented between the first filter and an output node, with the first signal path including a plurality of amplification stages configured to amplify a first signal. The first signal path can be substantially free of switches. The circuit can further include a second signal path implemented between the second filter and the output node, with the second signal path including a plurality of amplification stages configured to amplify a second signal. The second signal path can be substantially free of switches.
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公开(公告)号:US09048786B2
公开(公告)日:2015-06-02
申请号:US14020448
申请日:2013-09-06
CPC分类号: H03D7/1491 , H03D7/1458 , H03D7/165 , H03D2200/0088 , H03K17/687 , H04B1/3833 , H04B1/44
摘要: A transistor-based switch is coupled to a replica circuit that includes transistor circuitry similar to that of the switch. The replica circuit biases a switched transistor to promote linear operation of the switch.
摘要翻译: 基于晶体管的开关耦合到复制电路,该复制电路包括类似于开关的晶体管电路的晶体管电路。 复制电路偏置开关晶体管以促进开关的线性操作。
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公开(公告)号:US09246437B2
公开(公告)日:2016-01-26
申请号:US14702481
申请日:2015-05-01
IPC分类号: H04B1/44 , H03D7/14 , H03K17/687 , H04B1/3827
CPC分类号: H03D7/1491 , H03D7/1458 , H03D7/165 , H03D2200/0088 , H03K17/687 , H04B1/3833 , H04B1/44
摘要: A transistor-based switch is coupled to a replica circuit that includes transistor circuitry similar to that of the switch. The replica circuit biases a switched transistor to promote linear operation of the switch.
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公开(公告)号:US20140106685A1
公开(公告)日:2014-04-17
申请号:US14020448
申请日:2013-09-06
CPC分类号: H03D7/1491 , H03D7/1458 , H03D7/165 , H03D2200/0088 , H03K17/687 , H04B1/3833 , H04B1/44
摘要: A transistor-based switch is coupled to a replica circuit that includes transistor circuitry similar to that of the switch. The replica circuit biases a switched transistor to promote linear operation of the switch.
摘要翻译: 基于晶体管的开关耦合到复制电路,该复制电路包括类似于开关的晶体管电路的晶体管电路。 复制电路偏置开关晶体管以促进开关的线性操作。
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公开(公告)号:US11664839B2
公开(公告)日:2023-05-30
申请号:US17088527
申请日:2020-11-03
CPC分类号: H04B1/123 , H03F3/191 , H04B1/0057 , H04L5/001 , H04L5/14 , H03F2200/111 , H03F2200/294 , H04L5/0023
摘要: A carrier aggregation method can include amplifying a first signal with a first current converter to generate a current representative of the amplified first signal, and amplifying a second signal with a second current converter to generate a current representative of the amplified second signal. The method can further include processing the amplified first signal and the amplified second signal with an adder circuit, with the first current converter and the adder circuit forming a first cascode amplifier, and the second current converter and the adder circuit forming a second cascode amplifier. The method can further include providing an output signal at a common output node that is coupled to an output of each of the first and second cascode amplifiers.
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公开(公告)号:US20180054171A1
公开(公告)日:2018-02-22
申请号:US15669024
申请日:2017-08-04
CPC分类号: H03F3/181 , H03F1/0266 , H03F1/0272 , H03F1/0277 , H03F1/08 , H03F1/22 , H03F1/223 , H03F1/302 , H03F1/565 , H03F3/193 , H03F3/245 , H03F3/72 , H03F2200/129 , H03F2200/168 , H03F2200/294 , H03F2200/387 , H03F2200/391 , H03F2200/447 , H03F2200/451 , H03F2203/7215 , H03F2203/7221
摘要: Apparatus and methods for LNAs with mid-node impedance networks are provided herein. In certain configurations, an LNA includes an input, an output, a transconductance device, a cascode device, and a mid-node impedance network. The transconductance device generates an amplified signal by amplifying an input signal received at the input, and provides the amplified signal to the output via the cascode device. The mid-node impedance network is electrically connected between the transconductance device and the cascode device, and provides compensation for a parasitic capacitance of the gm device, thereby enhancing the LNA's performance.
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公开(公告)号:US20150311864A1
公开(公告)日:2015-10-29
申请号:US14702481
申请日:2015-05-01
IPC分类号: H03D7/14 , H04B1/3827 , H03K17/687
CPC分类号: H03D7/1491 , H03D7/1458 , H03D7/165 , H03D2200/0088 , H03K17/687 , H04B1/3833 , H04B1/44
摘要: A transistor-based switch is coupled to a replica circuit that includes transistor circuitry similar to that of the switch. The replica circuit biases a switched transistor to promote linear operation of the switch.
摘要翻译: 基于晶体管的开关耦合到复制电路,该复制电路包括类似于开关的晶体管电路的晶体管电路。 复制电路偏置开关晶体管以促进开关的线性操作。
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8.
公开(公告)号:US10050653B2
公开(公告)日:2018-08-14
申请号:US14683532
申请日:2015-04-10
摘要: Circuits and methods related to switchless carrier aggregation in radio-frequency receivers. In some embodiments, a carrier aggregation (CA) circuit can include a first filter configured to allow operation in a first frequency band, and a second filter configured to allow operation in a second frequency band. The CA circuit can further include a first signal path implemented between the first filter and an output node, with the first signal path including a plurality of amplification stages configured to amplify a first radio-frequency (RF) signal. The first signal path can be substantially free of switches. The CA circuit can further include a second signal path implemented between the second filter and the output node, with the second signal path including a plurality of amplification stages configured to amplify a second RF signal. The second signal path can be substantially free of switches.
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公开(公告)号:US20180054166A1
公开(公告)日:2018-02-22
申请号:US15669017
申请日:2017-08-04
CPC分类号: H03F1/0205 , H03F1/0266 , H03F1/0272 , H03F1/0277 , H03F1/223 , H03F1/302 , H03F1/565 , H03F3/193 , H03F3/245 , H03F3/72 , H03F2200/129 , H03F2200/294 , H03F2200/387 , H03F2200/391 , H03F2200/447 , H03F2200/451 , H03F2203/7215 , H03F2203/7221 , H04B1/3827
摘要: Apparatus and methods for biasing low noise amplifiers are provided herein. In certain configurations, a low noise amplifier (LNA) includes an input, an output, a transconductance device, a cascode device, a bias current source, and a feedback bias circuit. The transconductance device generates an amplified signal by amplifying an input signal received at the input, and provides the amplified signal to the output via the cascode device. The bias current source generates a bias current that flows through the cascode device and the transconductance device. The feedback bias circuit provides feedback from the LNA's output to the LNA's input to control an input bias voltage of the transconductance device.
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