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1. 发明授权

US08868015B2 Transmit architecture for wireless multi-mode applications 有权
标题翻译：无线多模应用的传输体系结构
公开(公告)号：US08868015B2
公开(公告)日：2014-10-21
申请号：US12782848
申请日：2010-05-19
申请人： Gregory Uehara , Chao Yang , Ruoxin Jiang , Fernando De Bernardinis , Alessandro Venca , Rinaldo Castello , Marc Leroux , Brian Brunn
发明人： Gregory Uehara , Chao Yang , Ruoxin Jiang , Fernando De Bernardinis , Alessandro Venca , Rinaldo Castello , Marc Leroux , Brian Brunn
IPC分类号： H04B1/04 , H04B1/00
CPC分类号： H04B1/0071
摘要： In one embodiment, an apparatus includes an upconversion unit configured to upconvert a baseband signal to a radio frequency (RF) signal. A plurality of baluns for a plurality of wireless bands are provided. Multiplexing circuitry is coupled to the plurality of baluns where the upconversion unit is coupled to each balun through the multiplexing circuitry. The multiplexing circuitry is configured to multiplex the radio frequency signal from the upconversion unit to one of the plurality of baluns based on a wireless band being used.
摘要翻译：在一个实施例中，一种装置包括上变频单元，其被配置为将基带信号上变频到射频（RF）信号。提供了多个用于多个无线频段的不平衡变压器。多路复用电路耦合到多个不平衡转换器，其中上转换单元通过复用电路耦合到每个平衡 - 不平衡变换器。复用电路被配置为基于所使用的无线频带将来自上变频单元的射频信号复用到多个巴伦中的一个。

2. 发明申请

US20100295599A1 Transmit Architecture for Wireless Multi-Mode Applications 有权
标题翻译：无线多模式应用的传输体系结构
公开(公告)号：US20100295599A1
公开(公告)日：2010-11-25
申请号：US12782848
申请日：2010-05-19
申请人： Gregory Uehara , Chao Yang , Ruoxin Jiang , Fernando De Bernardinis , Alessandro Venca , Rinaldo Castello , Marc Leroux , Brian Brunn
发明人： Gregory Uehara , Chao Yang , Ruoxin Jiang , Fernando De Bernardinis , Alessandro Venca , Rinaldo Castello , Marc Leroux , Brian Brunn
IPC分类号： G06G7/12 , H04B1/00
CPC分类号： H04B1/0071
摘要： In one embodiment, an apparatus includes an upconversion unit configured to upconvert a baseband signal to a radio frequency (RF) signal. A plurality of baluns for a plurality of wireless bands are provided. Multiplexing circuitry is coupled to the plurality of baluns where the upconversion unit is coupled to each balun through the multiplexing circuitry. The multiplexing circuitry is configured to multiplex the radio frequency signal from the upconversion unit to one of the plurality of baluns based on a wireless band being used.
摘要翻译：在一个实施例中，一种装置包括上变频单元，其被配置为将基带信号上变频到射频（RF）信号。提供了多个用于多个无线频段的不平衡变压器。多路复用电路耦合到多个不平衡转换器，其中上转换单元通过复用电路耦合到每个平衡 - 不平衡变换器。复用电路被配置为基于所使用的无线频带将来自上变频单元的射频信号复用到多个巴伦中的一个。

3. 发明授权

US07701372B1 Apparatus and methods for safe-mode delta-sigma modulators 有权
标题翻译：安全模式delta-sigma调制器的装置和方法
公开(公告)号：US07701372B1
公开(公告)日：2010-04-20
申请号：US12145965
申请日：2008-06-25
申请人： Ruoxin Jiang , Xiaodong Wang , Gregory Uehara
发明人： Ruoxin Jiang , Xiaodong Wang , Gregory Uehara
IPC分类号： H03M3/00
CPC分类号： H03M3/44 , H03M3/424 , H03M3/454
摘要： A delta-sigma modulator includes two integrators. One of the two integrators is lossy. The lossy integrator may be a continuous-time integrator, or a discrete-time integrator. Use of the lossy integrator maintains stability of the delta-sigma converter over a relatively wide range of input signals.
摘要翻译： Δ-Σ调制器包括两个积分器。两个集成商之一是有损的。有损积分器可以是连续时间积分器或离散时间积分器。使用有损积分器可在相对宽的输入信号范围内维持delta-sigma转换器的稳定性。

4. 发明授权

US06798372B1 Switched-capacitor frequency-to-current converter 有权
标题翻译：开关电容器频率到电流转换器
公开(公告)号：US06798372B1
公开(公告)日：2004-09-28
申请号：US10405191
申请日：2003-04-01
申请人： Yaohua Yang , Ruoxin Jiang , Rumin Yin
发明人： Yaohua Yang , Ruoxin Jiang , Rumin Yin
IPC分类号： H03M160
CPC分类号： H03D13/003 , H03K9/06
摘要： A frequency-to-current converter operative to convert a clock frequency to an output current is described; the frequency-to-current converter ensures that the output current increases linearly with the clock frequency. The frequency-to-current converter may be incorporated in analog-to-digital converters driven by clocks with variable frequencies. The frequency-to-current converter employs an integrator circuit, used to compare an input reference voltage and a current feedback into a sampling capacitor. At steady state, the feedback current is just sufficient to discharge the sampling capacitor to a fixed voltage. The core of the frequency-to-current conversion circuit includes one opamp, two capacitors, one feedback transistor and a few switches.
摘要翻译：描述了将时钟频率转换为输出电流的频率到电流转换器; 频率到电流转换器确保输出电流随时钟频率线性增加。频率到电流转换器可以并入由具有可变频率的时钟驱动的模数转换器中。频率到电流转换器采用积分器电路，用于将输入参考电压和电流反馈比较到采样电容器中。在稳定状态下，反馈电流恰好足以将采样电容放电到固定电压。频率到电流转换电路的核心包括一个运算放大器，两个电容器，一个反馈晶体管和几个开关。

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