公开(公告)号：US20130235953A1

公开(公告)日：2013-09-12

申请号：US13849112

申请日：2013-03-22

Applicant: BROADCOM CORPORATION

Inventor： Ray (Ramon) GOMEZ ,  Leonard Dauphinee ,  Massimo Brandolini ,  Jianhong Xiao ,  Dongsoo Koh ,  Young Shin ,  Chonghua Zhong ,  Reza Rahman Khan

IPC: H04B1/04 ,  H03M1/66

CPC classification number: H04B1/0475 ,  H03M1/66

Abstract: Embodiments provide transmitter topologies that improve the power efficiency and bandwidth of RF transmitters for high transmission power applications. In an embodiment, the common-emitter/source PA of conventional topologies is replaced with a current-input common-base/gate PA, which is stacked on top on an open-collector/drain current-output transmitter. The common-base/gate PA protects the output of the transmitter from large output voltage swings. The low input impedance of the common-base/gate PA makes the PA less susceptible to frequency roll-off, even in the presence of large parasitic capacitance produced by the transmitter. At the same time, the low input impedance of the common-base/gate PA reduces the voltage swing at the transmitter output and prevents the transmitter output from being compressed or modulated, In an embodiment, the DC output current of the transmitter is reused to bias the PA, which results in power savings compared to conventional transmitter topologies.

Abstract translation: 实施例提供了发射机拓扑，其提高用于高传输功率应用的RF发射机的功率效率和带宽。 在一个实施例中，常规拓扑的共发射极/源极PA被替换为电流输入公共基极/栅极PA，其在集电极开路/漏极电流输出发射器上堆叠在顶部。 公共端/门PA保护发射机的输出免受大的输出电压摆幅。 公共基极/门极PA的低输入阻抗使得即使在发射机产生大的寄生电容的情况下，PA也不易于频率滚降。 同时，公共基极/门极PA的低输入阻抗降低了发射机输出端的电压摆幅，并防止发射机输出被压缩或调制。在一个实施例中，发射机的直流输出电流被重新使用 偏置PA，与常规发射机拓扑结构相比，导致功率节省。

公开(公告)号：US20140341097A1

公开(公告)日：2014-11-20

申请号：US14284030

申请日：2014-05-21

Applicant: Broadcom Corporation

Inventor： Ray (Ramon) GOMEZ ,  Len DAUPHINEE

IPC: H04L27/00 ,  H04L5/08 ,  H04J1/08

CPC classification number: H04L27/0002 ,  H04J1/085 ,  H04L5/08 ,  H04Q11/0428 ,  H04Q2213/13034 ,  H04Q2213/13039 ,  H04Q2213/13098 ,  H04Q2213/13196 ,  H04Q2213/13333

Abstract: Embodiments provide an area, cost, and power efficient multi-service transceiver architecture. The multi-service transceiver architecture simplifies receiver/transmitter front ends needed for a multi-service architecture, by replacing significant portions of multiple receiver and/or transmitter front ends with a single ADC and/or DAC, respectively. In embodiments, a plurality of received service contents are combined into one composite analog/RF signal and applied to an ADC. The ADC converts the composite signal into a composite multi-service digital signal. Digital techniques are then used to separate the plurality of service contents into a plurality of respective digital streams that each can be independently demodulated. Similarly, in the transmit direction, a plurality of digital streams, including a plurality of service contents, are combined into one composite digital signal. The composite digital signal is applied to a DAC to generate a composite multi-service analog/RF signal for subsequent transmission over a coaxial cable or wirelessly via an antenna.

Abstract translation: 实施例提供了面积，成本和功率效率的多业务收发器架构。 通过分别用单个ADC和/或DAC替代多个接收器和/或发射器前端的重要部分，多业务收发器架构简化了多业务架构所需的接收机/发射机前端。 在实施例中，将多个接收到的服务内容组合成一个复合模拟/ RF信号并将其应用于ADC。 ADC将复合信号转换为复合多业务数字信号。 然后使用数字技术将多个服务内容分成多个相应的数字流，每个可以独立地解调。 类似地，在发送方向上，包括多个服务内容的多个数字流被组合成一个复合数字信号。 复合数字信号被施加到DAC以产生复合多业务模拟/ RF信号，用于通过同轴电缆进行随后的传输或通过天线无线地进行传输。