公开(公告)号：US20130225107A1

公开(公告)日：2013-08-29

申请号：US13584273

申请日：2012-08-13

申请人： Mark Vernon Lane ,  Chang-Ho Lee ,  Christian Holenstein ,  Mahim Ranjan ,  Praveen-Kumar Sampath ,  Frederic Bossu ,  Sumit Verma ,  Wesley Alan Sampson

发明人： Mark Vernon Lane ,  Chang-Ho Lee ,  Christian Holenstein ,  Mahim Ranjan ,  Praveen-Kumar Sampath ,  Frederic Bossu ,  Sumit Verma ,  Wesley Alan Sampson

IPC分类号： H03G3/20

CPC分类号： H04B1/0458 ,  H04B1/04 ,  H04B1/0475

摘要： Techniques for using a narrow filter located before a power amplifier to reduce interference in an adjacent frequency band are disclosed. In an exemplary design, an apparatus (e.g., a wireless device) includes the narrow filter and the power amplifier. The narrow filter is for a first frequency band (e.g., Band 40) and has a first bandwidth that is more narrow than the first frequency band. The narrow filter receives and filters an input radio frequency (RF) signal and provides a filtered RF signal. The power amplifier receives and amplifies the filtered RF signal and provides an amplified RF signal. The apparatus may further include a full filter for the first frequency band and located after the power amplifier. The full filter receives and filters the amplified RF signal and provides an output RF signal when it is selected for use.

摘要翻译： 公开了使用位于功率放大器之前的窄滤波器来减少相邻频带中的干扰的技术。 在示例性设计中，装置（例如，无线装置）包括窄滤波器和功率放大器。 窄滤波器用于第一频带（例如，频带40），并且具有比第一频带更窄的第一带宽。 窄滤波器接收并过滤输入射频（RF）信号并提供滤波后的RF信号。 功率放大器接收并放大经滤波的RF信号并提供放大的RF信号。 该装置还可以包括用于第一频带并位于功率放大器之后的全滤波器。 全滤波器接收并过滤放大的RF信号，并在选择使用时提供输出RF信号。

公开(公告)号：US08344765B2

公开(公告)日：2013-01-01

申请号：US12836454

申请日：2010-07-14

申请人： Dongjiang Qiao ,  Frederic Bossu

发明人： Dongjiang Qiao ,  Frederic Bossu

IPC分类号： H03B19/06 ,  H03K21/00

CPC分类号： H03K23/40 ,  H03K21/00

摘要： A method for dividing the frequency of a signal using a configurable dividing ratio is disclosed. An input signal with a first frequency is received at clocked switches in a frequency divider with a configurable dividing ratio. Non-clocked switches inside the frequency divider are operated to select one of multiple dividing ratios. An output signal is output with a second frequency that is the first frequency divided by the selected dividing ratio.

摘要翻译： 公开了一种使用可配置分频比对信号频率进行分频的方法。 具有第一频率的输入信号在具有可配置分频比的分频器中的时钟开关处被接收。 操作分频器内的非时钟开关可以选择多个分频比之一。 输出信号以第一频率除以选择的分频比的第二频率输出。

公开(公告)号：US08265568B2

公开(公告)日：2012-09-11

申请号：US12407700

申请日：2009-03-19

申请人： Dongjiang Qiao ,  Frederic Bossu

发明人： Dongjiang Qiao ,  Frederic Bossu

IPC分类号： H03K25/00

CPC分类号： G06F1/06 ,  H03K23/667 ,  H03K23/68

摘要： A synchronized frequency divider that can divide a clock signal in frequency and provide differential output signals having good signal characteristics is described. In one exemplary design, the synchronized frequency divider includes a single-ended frequency divider and a synchronization circuit. The single-ended frequency divider divides the clock signal in frequency and provides first and second single-ended signals, which may be complementary signals having timing skew. The synchronization circuit resamples the first and second single-ended signals based on the clock signal and provides differential output signals having reduced timing skew. In one exemplary design, the synchronization circuit includes first and second switches and first and second inverters. The first switch and the first inverter form a first sample-and-hold circuit or a first latch that resamples the first single-ended signal. The second switch and the second inverter form a second sample-and-hold circuit or a second latch that resamples the second single-ended signal.

摘要翻译： 描述了可以将时钟信号分频并提供具有良好信号特性的差分输出信号的同步分频器。 在一个示例性设计中，同步分频器包括单端分频器和同步电路。 单端分频器分频时钟信号，并提供第一和第二单端信号，这可能是具有定时偏移的互补信号。 同步电路基于时钟信号重新采样第一和第二单端信号，并提供具有减小的定时偏差的差分输出信号。 在一个示例性设计中，同步电路包括第一和第二开关以及第一和第二逆变器。 第一开关和第一反相器形成第一采样保持电路或重新采样第一单端信号的第一锁存器。 第二开关和第二反相器形成第二采样保持电路或重新采样第二单端信号的第二锁存器。

公开(公告)号：US20110012647A1

公开(公告)日：2011-01-20

申请号：US12836454

申请日：2010-07-14

申请人： Dongjiang Qiao ,  Frederic Bossu

发明人： Dongjiang Qiao ,  Frederic Bossu

IPC分类号： H03B19/00

CPC分类号： H03K23/40 ,  H03K21/00

摘要： A method for dividing the frequency of a signal using a configurable dividing ratio is disclosed. An input signal with a first frequency is received at clocked switches in a frequency divider with a configurable dividing ratio. Non-clocked switches inside the frequency divider are operated to select one of multiple dividing ratios. An output signal is output with a second frequency that is the first frequency divided by the selected dividing ratio.

摘要翻译： 公开了一种使用可配置分频比对信号频率进行分频的方法。 具有第一频率的输入信号在具有可配置分频比的分频器中的时钟开关处被接收。 操作分频器内的非时钟开关可以选择多个分频比之一。 输出信号以第一频率除以选择的分频比的第二频率输出。

公开(公告)号：US20090239592A1

公开(公告)日：2009-09-24

申请号：US12052657

申请日：2008-03-20

申请人： Junxiong Deng ,  Aristotele Hadjichristos ,  Aleksandar Tasic ,  Frederic Bossu

发明人： Junxiong Deng ,  Aristotele Hadjichristos ,  Aleksandar Tasic ,  Frederic Bossu

IPC分类号： H04B1/38

CPC分类号： H04W52/0206 ,  H03G3/20 ,  H04B1/16

摘要： An exemplary embodiment disclosed comprises a mixer having a plurality of input leads; a first degenerative impedance element coupled to a first input lead of the mixer; a second degenerative impedance element coupled to a second input lead of the mixer; and a local oscillator (LO) system comprising a plurality of duty cycle modes to generate a LO signal for the mixer, the local oscillator system operates in a first duty cycle based on a first gain state of the mixer, and in a second duty cycle based on a second gain state of the mixer.

摘要翻译： 公开的示例性实施例包括具有多个输入引线的混合器; 耦合到混合器的第一输入引线的第一退化阻抗元件; 耦合到混合器的第二输入引线的第二退化阻抗元件; 以及本地振荡器（LO）系统，其包括多个占空比模式以产生混频器的LO信号，本地振荡器系统基于混频器的第一增益状态在第一占空比中工作，并且在第二占空比 基于混频器的第二增益状态。

公开(公告)号：US06778019B2

公开(公告)日：2004-08-17

申请号：US10325589

申请日：2002-12-20

申请人： Jean-Charles Grasset ,  Frederic Bossu

发明人： Jean-Charles Grasset ,  Frederic Bossu

IPC分类号： H03F304

CPC分类号： H03F1/302 ,  H03F2200/372

摘要： A biasing device includes closed-loop transconductance slaving circuit, able to slave the time average of the base/emitter or gate/source voltage of the amplifier transistor (Q1) to a reference voltage corresponding to a desired quiescent current for the transistor. Moreover, viewed from the base or gate of the amplifier transistor (Q1), the impedance of the base/emitter or gate/source circuit is small at low frequency, and large with respect to the impedance of the radio frequency source within the radio frequency range of the signal. The device can be incorporated in a mobile terminal, such as a cellular mobile phone.

摘要翻译： 偏置装置包括闭环跨导从动电路，其能够将放大器晶体管（Q1）的基极/发射极或栅极/源极电压的时间平均值与对应于晶体管的期望静态电流的参考电压相关联。 此外，从放大晶体管（Q1）的基极或栅极观察，基极/发射极或栅极/源极电路的阻抗在低频时较小，相对于射频内的射频源的阻抗较大 信号范围。 该装置可以结合在诸如蜂窝移动电话的移动终端中。