公开(公告)号：US20130303103A1

公开(公告)日：2013-11-14

申请号：US13470123

申请日：2012-05-11

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/10 ,  G06G7/12

CPC分类号： H04B1/123

摘要： An adaptive cancellation circuit and method are provided. The circuit includes a main path and an auxiliary path. The main path includes a first amplifier configured to output a first amplified signal to a first mixer. The main path is configured to output a first signal comprising a wanted signal component and a distortion component. The auxiliary path includes a second amplifier configured to output a second amplified signal to a second mixer. The second mixer is connected to a filter configured to remove the wanted signal component. The auxiliary path is configured to output a second signal including the distortion component.

摘要翻译： 提供自适应消除电路和方法。 电路包括主路径和辅助路径。 主路径包括被配置为将第一放大信号输出到第一混频器的第一放大器。 主路径被配置为输出包括有用信号分量和失真分量的第一信号。 辅助路径包括被配置为将第二放大信号输出到第二混频器的第二放大器。 第二混频器连接到配置成去除所需信号分量的滤波器。 辅助路径被配置为输出包括失真分量的第二信号。

公开(公告)号：US08457580B2

公开(公告)日：2013-06-04

申请号：US12804399

申请日：2010-07-20

申请人： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

发明人： Mohyee Mikhemar ,  Hooman Darabi ,  Masoud Kahrizi

IPC分类号： H04B7/00 ,  H04B1/40

CPC分类号： H04B1/16 ,  H04B1/18 ,  H04B1/30

摘要： According to one embodiment, a compact low-power receiver comprises a front-end producing a front-end gain and a back-end producing a back-end gain. The front-end includes a transconductance amplifier providing digital gain control and outputting an amplified receive signal, a mixer for generating a down-converted signal from the amplified receive signal, and a transimpedance amplifier (TIA) including a current mode buffer. The TIA provides gain control for amplifying the down-converted signal to produce a front-end output signal. In one embodiment, the back end includes a second-order low-pass filter to produce a filtered signal from the front-end output signal and an analog-to-digital converter (ADC), wherein the filtered signal is fed directly to the ADC without direct-current (DC) offset cancellation being performed. In various embodiments, the front-end gain is substantially greater than the back-end gain.

摘要翻译： 根据一个实施例，紧凑型低功率接收机包括产生前端增益的前端和产生后端增益的后端。 前端包括提供数字增益控制和输出放大的接收信号的跨导放大器，用于从放大的接收信号产生下变频信号的混频器，以及包括电流模式缓冲器的跨阻抗放大器（TIA）。 TIA提供用于放大下变频信号以产生前端输出信号的增益控制。 在一个实施例中，后端包括从前端输出信号产生滤波信号的二阶低通滤波器和模数转换器（ADC），其中滤波后的信号被直接馈送到ADC 没有执行直流（DC）偏移消除。 在各种实施例中，前端增益基本上大于后端增益。

公开(公告)号：US08369807B2

公开(公告)日：2013-02-05

申请号：US13159873

申请日：2011-06-14

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： G06F3/033 ,  H04B1/16 ,  H03D1/24

CPC分类号： H04B1/38

摘要： A receiver includes a frequency translation bandpass filter (FTBPF) and an RF receiver section. The RF receiver section includes an amplifier section, a phase information detection module, an amplitude information detection module, and analog to digital conversion (ADC) modules. The FTBPF is operable to filter an inbound radio frequency (RF) signal to produce a filtered inbound RF signal. The amplifier section is operable to amplify the filtered inbound RF signal to produce an amplified inbound RF signal. The phase information detection module, when enabled, is operable to determine phase information from the amplified inbound RF signal. The amplitude information detection module, when enabled, is operable to determine amplitude information from the amplified inbound RF signal. A first one of the ADCs is operable to convert the phase information into digital phase information and a second one of the ADCs is operable to convert the amplitude information into digital amplitude information.

摘要翻译： 接收机包括频率转换带通滤波器（FTBPF）和RF接收机部分。 RF接收器部分包括放大器部分，相位信息检测模块，振幅信息检测模块和模数转换（ADC）模块。 FTBPF可操作以对入站射频（RF）信号进行滤波，以产生滤波的入站RF信号。 放大器部分可操作以放大经滤波的入站RF信号以产生放大的入站RF信号。 相位信息检测模块在使能时可操作以从放大的入站RF信号确定相位信息。 振幅信息检测模块在被使能时可用于根据放大的入站RF信号确定振幅信息。 ADC中的第一个可操作以将相位信息转换为数字相位信息，并且第二ADC可用于将幅度信息转换为数字幅度信息。

公开(公告)号：US08208865B2

公开(公告)日：2012-06-26

申请号：US12567071

申请日：2009-09-25

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/38

CPC分类号： H04B1/525 ,  H04B1/18

摘要： Embodiments of an RF front-end are presented herein. In an embodiment, the RF front end comprises a power amplifier (PA), a noise-matched low-noise amplifier (LNA), a balance network, and a four-port isolation module. A first port of the isolation module is coupled to an antenna. The second port of the isolation module is coupled to the balancing network. The third port is coupled an output of the PA. The fourth port is coupled to a differential input of the noise-matched LNA. The isolation module effectively isolates the third port from the fourth port to prevent strong outbound signals received at the third port from saturating the LNA coupled to the fourth port. Isolation is achieved via electrical balance. In an embodiment, the signal path coupling the antenna at the first port to the differential input of the LNA at the fourth port is shorter than a wavelength of the inbound signal received by the antenna.

摘要翻译： 这里呈现RF前端的实施例。 在一个实施例中，RF前端包括功率放大器（PA），噪声匹配低噪声放大器（LNA），平衡网络和四端口隔离模块。 隔离模块的第一端口耦合到天线。 隔离模块的第二个端口耦合到平衡网络。 第三个端口耦合PA的输出。 第四端口耦合到噪声匹配LNA的差分输入。 隔离模块有效地将第三端口与第四端口隔离，以防止在第三端口处接收的强大的出站信号使连接到第四端口的LNA饱和。 通过电气平衡实现隔离。 在一个实施例中，将第一端口处的天线耦合到第四端口处的LNA的差分输入的信号路径比由天线接收的入站信号的波长短。

公开(公告)号：US20120040632A1

公开(公告)日：2012-02-16

申请号：US12806500

申请日：2010-08-13

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/16 ,  H02H9/04

CPC分类号： H04B1/18 ,  H01L23/60 ,  H01L2924/0002 ,  H01L2924/00

摘要： According to one embodiment, an input control unit to provide isolation and electrostatic discharge (ESD) protection for a circuit in an RF transceiver comprises a switching device coupled between an input of the circuit and ground. The switching device is configured to provide ESD protection while the circuit is activated. The switching device is further configured to ground the input while the circuit is non-activated, thereby concurrently isolating the input and providing ESD protection. A method for providing isolation and ESD protection for a circuit in an RF transceiver comprises activating the circuit, providing ESD protection while the circuit is activated, deactivating the circuit, and coupling an input of the circuit to ground, thereby concurrently isolating the input and providing ESD protection while the circuit is non-activated. The method and switching device can be used to provide isolation and ESD protection to receive bands in the RF transceiver.

摘要翻译： 根据一个实施例，为RF收发器中的电路提供隔离和静电放电（ESD）保护的输入控制单元包括耦合在电路的输入和地之间的开关装置。 开关器件被配置为在电路被激活时提供ESD保护。 开关装置还被配置为在电路未被激活的同时对输入进行接地，从而同时隔离输入并提供ESD保护。 用于为RF收发器中的电路提供隔离和ESD保护的方法包括激活电路，在电路被激活时提供ESD保护，使电路失活，以及将电路的输入耦合到地，从而同时隔离输入并提供 电路未激活时的ESD保护。 该方法和开关装置可用于提供隔离和ESD保护以在RF收发器中接收频带。

公开(公告)号：US20110299576A1

公开(公告)日：2011-12-08

申请号：US13159873

申请日：2011-06-14

申请人： MOHYEE MIKHEMAR ,  HOOMAN DARABI

发明人： MOHYEE MIKHEMAR ,  HOOMAN DARABI

IPC分类号： H04B1/10 ,  H04B1/38

CPC分类号： H04B1/38

摘要： A receiver includes a frequency translation bandpass filter (FTBPF) and an RF receiver section. The RF receiver section includes an amplifier section, a phase information detection module, an amplitude information detection module, and analog to digital conversion (ADC) modules. The FTBPF is operable to filter an inbound radio frequency (RF) signal to produce a filtered inbound RF signal. The amplifier section is operable to amplify the filtered inbound RF signal to produce an amplified inbound RF signal. The phase information detection module, when enabled, is operable to determine phase information from the amplified inbound RF signal. The amplitude information detection module, when enabled, is operable to determine amplitude information from the amplified inbound RF signal. A first one of the ADCs is operable to convert the phase information into digital phase information and a second one of the ADCs is operable to convert the amplitude information into digital amplitude information.

摘要翻译： 接收机包括频率转换带通滤波器（FTBPF）和RF接收机部分。 RF接收器部分包括放大器部分，相位信息检测模块，振幅信息检测模块和模数转换（ADC）模块。 FTBPF可操作以对入站射频（RF）信号进行滤波，以产生滤波的入站RF信号。 放大器部分可操作以放大经滤波的入站RF信号以产生放大的入站RF信号。 相位信息检测模块在使能时可操作以从放大的入站RF信号确定相位信息。 振幅信息检测模块在被使能时可用于根据放大的入站RF信号确定振幅信息。 ADC中的第一个可操作以将相位信息转换为数字相位信息，并且第二ADC可用于将幅度信息转换为数字幅度信息。

公开(公告)号：US20110299437A1

公开(公告)日：2011-12-08

申请号：US12946688

申请日：2010-11-15

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B7/005

CPC分类号： H04B1/582 ,  H04B1/0458 ,  H04B1/48

摘要： A front end module includes a duplexer and a balancing network. The duplexer includes a compensation circuit and a transformer three windings having five nodes. The first node for operably coupling an antenna to the first winding; the second node operable to receive an outbound wireless signal and operably couples the first winding to the second winding; the third node operably couples the second winding to a balancing network; the fourth node operably coupled to output a first signal component corresponding to an inbound wireless signal from the third winding; and the fifth node operably coupled to output a second signal component corresponding to an inbound wireless signal from the third winding. The duplexer provides electrical isolation between the first and second signal components and the outbound wireless signal. The compensation module is operable to compensate the electrical isolation between the first and second signals and the outbound wireless signal.

摘要翻译： 前端模块包括双工器和平衡网络。 双工器包括补偿电路和变压器三个具有五个节点的绕组。 用于将天线可操作地耦合到第一绕组的第一节点; 所述第二节点可操作以接收出站无线信号并将所述第一绕组可操作地耦合到所述第二绕组; 第三节点将第二绕组可操作地耦合到平衡网络; 所述第四节点可操作地耦合以输出对应于来自所述第三绕组的入站无线信号的第一信号分量; 并且第五节点可操作地耦合以输出对应于来自第三绕组的入站无线信号的第二信号分量。 双工器提供第一和第二信号分量与出站无线信号之间的电气隔离。 补偿模块可用于补偿第一和第二信号与出站无线信号之间的电隔离。

公开(公告)号：US20110028115A1

公开(公告)日：2011-02-03

申请号：US12461069

申请日：2009-07-30

申请人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

发明人： Ahmad Mirzaei ,  Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/26

CPC分类号： H04B1/28 ,  H04B1/123

摘要： A method and apparatus is disclosed to effectively frequency translate a filter characterized as a low quality factor (Q) filter corresponding to a baseband frequency of approximately zero Hertz or to an intermediate frequency (IF) to a filter characterized as a high Q filter at frequencies greater than the baseband frequency or the IF. A downconversion mixer is used to frequency translate a communication signal to the baseband frequency or the IF using a first local oscillator signal to provide a downconverted communication signal. A filter characterized as the low Q filter corresponding to the baseband frequency or the IF filters the downconverted communication signal to provide a filtered communication signal. An upconversion mixer is used to frequency translate a communication signal using a second local oscillator signal, the second local oscillator signal being substantially similar in frequency of the first local oscillator signal. The frequency translation by the upconversion mixer, in effect, translates the filter characterization from the low Q filter to the high Q filter at frequencies greater than the baseband frequency or the IF.

摘要翻译： 公开了一种方法和装置，以有效地频率转换滤波器，其特征在于对应于大约零赫兹的基带频率的低质量因子（Q）滤波器或者将中频（IF）调频到以频率为高Q滤波器的滤波器 大于基带频率或IF。 下变频混频器用于使用第一本地振荡器信号将通信信号频率转换为基带频率或IF，以提供经下变频的通信信号。 滤波器，其特征在于对应于基带频率的低Q滤波器或IF对下变频通信信号进行滤波以提供经滤波的通信信号。 使用上变频混频器使用第二本地振荡器信号对通信信号进行频率转换，第二本地振荡器信号在第一本机振荡器信号的频率上基本相似。 通过上变频混频器进行的频率转换实际上将滤波器特性从低Q滤波器转换为高于基带频率或IF的频率的高Q滤波器。

公开(公告)号：US20100035563A1

公开(公告)日：2010-02-11

申请号：US12363486

申请日：2009-01-30

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/40

CPC分类号： H04B1/18 ,  H04B1/40

摘要： A radio frequency (RF) transceiver front-end includes an antenna, an RF receiver section, an RF transmitter section, a balancing circuit, and a multiple node isolation and coupling circuit. The multiple node isolation and coupling circuit is coupled to the antenna, the RF receiver section, the RF transmitter section, and the balancing circuit. The multiple node isolation and coupling circuit provides an inbound RF signal from the antenna to the RF receiver section and provides an outbound RF signal from the RF transmitter section to the antenna, wherein, by providing an isolating signal to the balancing circuit, the multiple node isolation and coupling circuit substantially isolates the outbound RF signal from the inbound RF signal.

摘要翻译： 射频（RF）收发器前端包括天线，RF接收器部分，RF发射器部分，平衡电路和多节点隔离和耦合电路。 多节点隔离和耦合电路耦合到天线，RF接收器部分，RF发射器部分和平衡电路。 多节点隔离和耦合电路提供从天线到RF接收器部分的入站RF信号，并且将来自RF发射器部分的出站RF信号提供给天线，其中，通过向平衡电路提供隔离信号，多节点 隔离和耦合电路基本上将出站RF信号与入站RF信号隔离开。

公开(公告)号：US09191049B2

公开(公告)日：2015-11-17

申请号：US13470123

申请日：2012-05-11

申请人： Mohyee Mikhemar ,  Hooman Darabi

发明人： Mohyee Mikhemar ,  Hooman Darabi

IPC分类号： H04B1/10 ,  H04B1/12

CPC分类号： H04B1/123

摘要： An adaptive cancellation circuit and method are provided. The circuit includes a main path and an auxiliary path. The main path includes a first amplifier configured to output a first amplified signal to a first mixer. The main path is configured to output a first signal comprising a wanted signal component and a distortion component. The auxiliary path includes a second amplifier configured to output a second amplified signal to a second mixer. The second mixer is connected to a filter configured to remove the wanted signal component. The auxiliary path is configured to output a second signal including the distortion component.

摘要翻译： 提供自适应消除电路和方法。 电路包括主路径和辅助路径。 主路径包括被配置为将第一放大信号输出到第一混频器的第一放大器。 主路径被配置为输出包括有用信号分量和失真分量的第一信号。 辅助路径包括被配置为将第二放大信号输出到第二混频器的第二放大器。 第二混频器连接到配置成去除所需信号分量的滤波器。 辅助路径被配置为输出包括失真分量的第二信号。