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公开(公告)号：US20130314160A1
公开(公告)日：2013-11-28
申请号：US13798097
申请日：2013-03-13
Applicant: MEDIATEK INC.
Inventor： Ming-Da Tsai , Chih-Fan Liao
IPC: H03F3/193
CPC classification number: H03F3/193 , H03F1/3211 , H03F3/45475 , H03F3/72 , H03F2200/294 , H03F2203/45138 , H03G3/3052 , H04B1/109
Abstract: A low noise amplifier is used to amplify a differential input pair to generate a differential output pair. The low noise amplifier includes two main paths, two assistant circuits and two adders to make noise carried on two output signals of the differential output pair be the same; therefore, the noise of the two output signals can be fully cancelled in the following operations.
Abstract translation: 低噪声放大器用于放大差分输入对以产生差分输出对。 低噪声放大器包括两个主路径，两个辅助电路和两个加法器，使差分输出对的两个输出信号上承载的噪声相同; 因此，在以下操作中可以完全取消两个输出信号的噪声。
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公开(公告)号：US09025709B2
公开(公告)日：2015-05-05
申请号：US14221302
申请日：2014-03-21
Applicant: Mediatek Inc.
Inventor： Chih-Fan Liao , Ming-Da Tsai
CPC classification number: H04B1/10 , H03F1/3211 , H03F1/3223 , H03F3/195 , H03F3/211 , H03F3/3028 , H03F3/45475 , H03F2200/294 , H03F2200/411 , H03F2203/45512 , H03F2203/45526 , H03F2203/45528 , H03F2203/45594 , H03F2203/45702 , H04L1/0036
Abstract: A receiver front end circuit includes a low-noise amplifier including: a first receiver path having: a first low-noise transconductor to amplify a received signal and output the amplified received signal; and a first mixer to down-convert the amplified received signal. A second receiver path includes: an auxiliary receiver having: a second transconductor to output an amplified received signal; a baseband amplifier having an input port and an output port; a first resistance coupling the input port to the output port of the baseband amplifier and to convert the amplified received signal from current to voltage and set a voltage gain of the second receiver path; and a second resistance coupled from the output port of the baseband amplifier to the first mixer output. In some examples, frequency-upconversion feedback path includes a third mixer to frequency up-convert the amplified received signal at an output of the second receiver path.
Abstract translation: 接收机前端电路包括低噪声放大器，包括：第一接收器路径，具有：第一低噪声跨导器，用于放大接收信号并输出放大的接收信号; 以及用于对放大的接收信号进行下变频的第一混频器。 第二接收机路径包括：辅助接收机，具有：第二跨导体，用于输出放大的接收信号; 具有输入端口和输出端口的基带放大器; 第一电阻将输入端口耦合到基带放大器的输出端口，并将放大的接收信号从电流转换成电压，并设置第二接收器路径的电压增益; 以及从基带放大器的输出端口耦合到第一混频器输出的第二电阻。 在一些示例中，上变频反馈路径包括第三混频器，用于在第二接收机路径的输出端对放大的接收信号进行升频转换。
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公开(公告)号：US08725105B2
公开(公告)日：2014-05-13
申请号：US13798097
申请日：2013-03-13
Applicant: Mediatek Inc.
Inventor： Ming-Da Tsai , Chih-Fan Liao
CPC classification number: H03F3/193 , H03F1/3211 , H03F3/45475 , H03F3/72 , H03F2200/294 , H03F2203/45138 , H03G3/3052 , H04B1/109
Abstract: A low noise amplifier is used to amplify a differential input pair to generate a differential output pair. The low noise amplifier includes two main paths, two assistant circuits and two adders to make noise carried on two output signals of the differential output pair be the same; therefore, the noise of the two output signals can be fully cancelled in the following operations.
Abstract translation: 低噪声放大器用于放大差分输入对以产生差分输出对。 低噪声放大器包括两个主路径，两个辅助电路和两个加法器，使差分输出对的两个输出信号上承载的噪声相同; 因此，在以下操作中可以完全取消两个输出信号的噪声。
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公开(公告)号：US20140355728A1
公开(公告)日：2014-12-04
申请号：US14221302
申请日：2014-03-21
Applicant: MEDIATEK INC.
Inventor： Chih-Fan Liao , Ming-Da Tsai
CPC classification number: H04B1/10 , H03F1/3211 , H03F1/3223 , H03F3/195 , H03F3/211 , H03F3/3028 , H03F3/45475 , H03F2200/294 , H03F2200/411 , H03F2203/45512 , H03F2203/45526 , H03F2203/45528 , H03F2203/45594 , H03F2203/45702 , H04L1/0036
Abstract: A receiver front end circuit includes a low-noise amplifier including: a first receiver path having: a first low-noise transconductor to amplify a received signal and output the amplified received signal; and a first mixer to down-convert the amplified received signal. A second receiver path includes: an auxiliary receiver having: a second transconductor to output an amplified received signal; a baseband amplifier having an input port and an output port; a first resistance coupling the input port to the output port of the baseband amplifier and to convert the amplified received signal from current to voltage and set a voltage gain of the second receiver path; and a second resistance coupled from the output port of the baseband amplifier to the first mixer output. In some examples, frequency-upconversion feedback path includes a third mixer to frequency up-convert the amplified received signal at an output of the second receiver path.
Abstract translation: 接收机前端电路包括低噪声放大器，包括：第一接收器路径，具有：第一低噪声跨导器，用于放大接收信号并输出放大的接收信号; 以及用于对放大的接收信号进行下变频的第一混频器。 第二接收机路径包括：辅助接收机，具有：第二跨导体，用于输出放大的接收信号; 具有输入端口和输出端口的基带放大器; 第一电阻将输入端口耦合到基带放大器的输出端口，并将放大的接收信号从电流转换成电压，并设置第二接收器路径的电压增益; 以及从基带放大器的输出端口耦合到第一混频器输出的第二电阻。 在一些示例中，上变频反馈路径包括第三混频器，用于在第二接收机路径的输出端对放大的接收信号进行升频转换。
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