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    Multi-tuner variable low IF receiver for multi-channel applications
    13.
    发明授权
    Multi-tuner variable low IF receiver for multi-channel applications 有权
    用于多通道应用的多调谐器可变低IF接收器

    公开(公告)号：US08107916B2

    公开(公告)日：2012-01-31

    申请号：US12553701

    申请日：2009-09-03

    Applicant: Francesco Gatta ,  Ramon Gomez ,  Leonard Dauphinee ,  Young Joon Shin ,  Hanli Zou ,  Massimo Brandolini ,  Giuseppe Cusmai

    Inventor： Francesco Gatta ,  Ramon Gomez ,  Leonard Dauphinee ,  Young Joon Shin ,  Hanli Zou ,  Massimo Brandolini ,  Giuseppe Cusmai

    IPC: H04B1/10 ,  H04K3/00

    CPC classification number: H04N5/455 ,  H04N5/45 ,  H04N21/4263 ,  H04N21/4382

    Abstract: Systems and methods for demodulating a plurality of contiguous channels contained within a bandlimited portion of a radio-frequency (RF) input signal are provided. In an embodiment, the bandlimited portion of the RF input signal is down-converted to baseband. After down-conversion, the bandlimited portion overlaps at baseband with a mirror image of the bandlimited portion. The plurality of contiguous channels within the down-converted signal similarly overlap at baseband and subsequently occupy a bandwidth substantially equal to half that required before down-converting. Image rejection is performed in the digital domain to recover each of the plurality of overlapping channels.

    Abstract translation: 提供了用于解调包含在射频（RF）输入信号的频带限制部分内的多个连续信道的系统和方法。 在一个实施例中，RF输入信号的频带限制部分被下变频为基带。 在下转换之后，频带限制部分与带限制部分的镜像重叠在基带处。 下变频信号内的多个相邻信道类似地在基带处重叠，并且随后占据基本上等于下变频所需的一半的带宽。 在数字域中进行图像抑制以恢复多个重叠信道中的每一个。

    Variable Low IF Receiver for Multi-Channel Applications
    14.
    发明申请
    Variable Low IF Receiver for Multi-Channel Applications 有权
    用于多通道应用的可变低中频接收器

    公开(公告)号：US20100067630A1

    公开(公告)日：2010-03-18

    申请号：US12553687

    申请日：2009-09-03

    Applicant: Francesco GATTA ,  Ramon Gomez ,  Leonard Dauphinee ,  Young Joon Shin ,  Hanli Zou ,  Massimo Brandolini ,  Giuseppe Cusmai

    Inventor： Francesco GATTA ,  Ramon Gomez ,  Leonard Dauphinee ,  Young Joon Shin ,  Hanli Zou ,  Massimo Brandolini ,  Giuseppe Cusmai

    IPC: H04B1/10

    CPC classification number: H04N5/455 ,  H04N5/45 ,  H04N21/4263 ,  H04N21/4382

    Abstract: Systems and methods for demodulating a plurality of contiguous channels contained within a bandlimited portion of a radio-frequency (RF) input signal are provided. In an embodiment, the bandlimited portion of the RF input signal is down-converted to baseband. After down-conversion, the bandlimited portion overlaps at baseband with a mirror image of the bandlimited portion. The plurality of contiguous channels within the down-converted signal similarly overlap at baseband and subsequently occupy a bandwidth substantially equal to half that required before down-converting. Image rejection is performed in the digital domain to recover each of the plurality of overlapping channels.

    Abstract translation: 提供了用于解调包含在射频（RF）输入信号的频带限制部分内的多个连续信道的系统和方法。 在一个实施例中，RF输入信号的频带限制部分被下变频为基带。 在下转换之后，频带限制部分与带限制部分的镜像重叠在基带处。 下变频信号内的多个相邻信道类似地在基带处重叠，并且随后占据基本上等于下变频所需的一半的带宽。 在数字域中进行图像抑制以恢复多个重叠信道中的每一个。

    Wideband Power Efficient High Transmission Power Radio Frequency (RF) Transmitter
    16.
    发明申请
    Wideband Power Efficient High Transmission Power Radio Frequency (RF) Transmitter 有权
    宽带功率有效的高功率射频（RF）发射机

    公开(公告)号：US20130084816A1

    公开(公告)日：2013-04-04

    申请号：US13249741

    申请日：2011-09-30

    Applicant: Ray (Ramon) Gomez ,  Leonard Dauphinee ,  Massimo Brandolini ,  Jianhong Xiao ,  Dongsoo Koh ,  Young Shin ,  Chonghua Zhong ,  Rezaur Rahman Khan

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

    IPC: H04W88/02

    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被置于集电极/漏极电流输出发射器顶部堆叠的电流输入公共基极/栅极PA替代。 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，与常规发射机拓扑相比，发射机的DC输出电流被重新用于偏置PA，这导致功率节省。

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