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1. 发明公开

EP2557686A2 System and method for improving power efficiency of a transmitter 有权转让
标题翻译： Systeme und Verfahren zur Verbesserung der Effizienz einesÜbertragers
公开(公告)号：EP2557686A2
公开(公告)日：2013-02-13
申请号：EP12180089.0
申请日：2012-08-10
申请人： Fujitsu Semiconductor Limited
发明人： Oliaei, Omid , Newman, David , Kirschenmann, Mark
IPC分类号： H03F3/24 , H03F3/45 , H03F3/68
摘要： In accordance with some embodiments of the present disclosure, a circuit comprises a balun (234) configured to receive a radio frequency (RF) signal at a first input port and a second input port of an input coil (236). The balun (234) is further configured to output the RF signal at an output coil (238) communicatively coupled to the input coil. The circuit also comprises a supply voltage selector circuit (240) coupled to the input coil and configured to adjust a bias voltage at the input coil (236) according to a power level of the RF signal received at the input coil. (236)
摘要翻译：根据本公开的一些实施例，电路包括被配置为在输入线圈（236）的第一输入端口和第二输入端口处接收射频（RF）信号的平衡 - 不平衡转换器（234）。平衡 - 不平衡变换器（234）还被配置为在通信地耦合到输入线圈的输出线圈（238）处输出RF信号。电路还包括耦合到输入线圈并被配置为根据在输入线圈处接收的RF信号的功率电平来调节输入线圈（236）处的偏置电压的电源电压选择器电路（240）。（236）

2. 发明公开

EP2560286A2 System and Method for Reducing or Eliminating Temperature Dependence of a Coherent Receiver in a Wireless Communication Device 有权转让
标题翻译：系统和一种用于在无线通信设备减少或消除了相干接收机的温度独立性的方法
公开(公告)号：EP2560286A2
公开(公告)日：2013-02-20
申请号：EP12178040.7
申请日：2012-07-26
申请人： Fujitsu Semiconductor Limited
发明人： Oliaei, Omid , Rector, Stephen , Benevento, Cristiano
IPC分类号： H04B1/04
CPC分类号： H04B1/0475
摘要： To reduce temperature dependence of a coherent receiver in a wireless communication device, a first current is generated equal to a bandgap voltage divided by a resistance selected to approximately match a process resistance integral to a receiver. A second current is generated equal to temperature-dependent current multiplied by a predetermined scaling factor and subtracted from the first current to generate a bias current for supply to a receiver.
摘要翻译：为了减少在无线通信设备中的相干接收器的温度依赖性时，产生第一电流等于带隙电压通过选择以近似地匹配的过程电阻集成到接收器的电阻分割。第二电流产生等于温度依赖性电流乘以缩放因子，并从第一电流预定减去以生成用于提供给一个接收器的偏置电流。

3. 发明公开

EP2557685A1 System and method for preserving input impedance of a current-mode circuit 有权转让
标题翻译：系统和Verfahren zur Bewahrung der Eingangsimpedanz einer当前模式Schaltung
公开(公告)号：EP2557685A1
公开(公告)日：2013-02-13
申请号：EP12178976.2
申请日：2012-08-02
申请人： Fujitsu Semiconductor Limited
发明人： Yu, Chuanzhao , Oliaei, Omid , Newman, David , Gomez, Michael L
IPC分类号： H03F3/193
CPC分类号： H03F3/193
摘要： In accordance with some embodiments of the present disclosure, a circuit comprises an input node configured to receive a current-mode input signal and an input stage that includes an input device communicatively coupled to the input node. The input device is configured to receive the input signal at the input node. The circuit additionally comprises bias circuitry communicatively coupled to the input stage and configured to provide a bias current for the input device. The bias circuitry is also configured to remove at least a portion of the bias current from the input signal through a feedback loop associated with the input node such that the input signal is received by the input device with at least a portion of the bias current removed. The circuit further comprises an output stage communicatively coupled to the input stage and configured to output a current-mode output signal based on the input signal.
摘要翻译：根据本公开的一些实施例，电路包括被配置为接收电流模式输入信号的输入节点和包括通信地耦合到输入节点的输入装置的输入级。输入设备被配置为在输入节点处接收输入信号。电路还包括通信地耦合到输入级并被配置为为输入装置提供偏置电流的偏置电路。偏置电路还被配置为通过与输入节点相关联的反馈回路从输入信号中去除偏置电流的至少一部分，使得输入信号被输入装置接收，其中偏置电流的至少一部分被去除。电路还包括通信地耦合到输入级并被配置为基于输入信号输出电流模式输出信号的输出级。

4. 发明公开

EP2429081A1 Receiver with feedback continuous-time delta-sigma modulator with current-mode input 审中-公开
标题翻译： Delta-Sigma-Modulator-Rückkoppelungmit Strommoduseingang的Empfängermit zeitkontinuier
公开(公告)号：EP2429081A1
公开(公告)日：2012-03-14
申请号：EP11180627.9
申请日：2011-09-08
申请人： Fujitsu Semiconductor Limited
发明人： Oliaei, Omid
IPC分类号： H03M3/00
CPC分类号： H03M3/454 , H03M3/424 , H04B1/0014
摘要： In accordance with some embodiments of the present disclosure, a receiver may include a downconverter configured to demodulate a modulated wireless signal to produce a current-mode baseband signal and an analog-to-digital converter (ADC) configured to convert the current-mode baseband signal into a digital output signal. The downconverter may be coupled to the ADC without an intervening filter element.
摘要翻译：根据本公开的一些实施例，接收机可以包括下变频器，其配置成解调调制无线信号以产生电流模式基带信号，以及模数转换器（ADC），其被配置为将当前模式基带信号转换为数字输出信号。下变频器可以耦合到ADC而没有中间滤波器元件。

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