公开(公告)号：US09246719B2

公开(公告)日：2016-01-26

申请号：US14319992

申请日：2014-06-30

Applicant: MaxLinear, Inc.

Inventor： Raja Pullela ,  Yu Su ,  Wenjian Chen

IPC: H04L25/06 ,  H04L25/10 ,  H04L25/08 ,  H03D7/16 ,  H04B1/30

CPC classification number: H04L25/08 ,  H03D7/165 ,  H04B1/30

Abstract: A circuit for down-converting an RF signal to a baseband signal includes a trans-admittance amplifier adapted to receive the RF signal and generate in response a pair of differential current signals. The circuit further includes a trans-impedance amplifier having at least four mixers and at least four linear amplifiers. The four mixers frequency down-convert the pair of differential current signals to generate four pairs of differential baseband current signals, wherein each pair of the differential baseband current signals has a different phase and is associated with each of the linear amplifiers. Additionally, the circuit includes a summing block that generates an in-phase signal using a first weighted sum of the four different baseband current signals and a quadrature signal using a second weighted sum of the four different baseband current signals. The circuit further includes an analog-to-digital converter for converting the in-phase and quadrature signals to respective digital representations.

Abstract translation: 用于将RF信号下变频为基带信号的电路包括适合于接收RF信号并且响应于一对差分电流信号而产生的反导纳放大器。 电路还包括具有至少四个混频器和至少四个线性放大器的跨阻抗放大器。 四个混频器对一对差分电流信号进行下变频以产生四对差分基带电流信号，其中每对差分基带电流信号具有不同的相位并且与每个线性放大器相关联。 此外，该电路包括一个求和块，其使用四个不同基带电流信号的第一加权和产生同相信号，并使用四个不同基带电流信号的第二加权和产生正交信号。 电路还包括用于将同相和正交信号转换为相应数字表示的模数转换器。

公开(公告)号：US20150063508A1

公开(公告)日：2015-03-05

申请号：US14319992

申请日：2014-06-30

Applicant: MaxLinear, Inc.

Inventor： Raja Pullela ,  Yu Su ,  Wenjian Chen

IPC: H04L25/08

CPC classification number: H04L25/08 ,  H03D7/165 ,  H04B1/30

Abstract: A circuit for down-converting an RF signal to a baseband signal includes a trans-admittance amplifier adapted to receive the RF signal and generate in response a pair of differential current signals. The circuit further includes a trans-impedance amplifier having at least four mixers and at least four linear amplifiers. The four mixers frequency down-convert the pair of differential current signals to generate four pairs of differential baseband current signals, wherein each pair of the differential baseband current signals has a different phase and is associated with each of the linear amplifiers. Additionally, the circuit includes a summing block that generates an in-phase signal using a first weighted sum of the four different baseband current signals and a quadrature signal using a second weighted sum of the four different baseband current signals. The circuit further includes an analog-to-digital converter for converting the in-phase and quadrature signals to respective digital representations.

Abstract translation: 用于将RF信号下变频为基带信号的电路包括适合于接收RF信号并且响应于一对差分电流信号而产生的反导纳放大器。 电路还包括具有至少四个混频器和至少四个线性放大器的跨阻抗放大器。 四个混频器对一对差分电流信号进行下变频以产生四对差分基带电流信号，其中每对差分基带电流信号具有不同的相位并且与每个线性放大器相关联。 此外，该电路包括一个求和块，其使用四个不同基带电流信号的第一加权和产生同相信号，并使用四个不同基带电流信号的第二加权和产生正交信号。 电路还包括用于将同相和正交信号转换为相应数字表示的模数转换器。