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1. 发明授权

US09071317B2 Nullification of transmitter noise at receive signal frequency 有权
公开(公告)号：US09071317B2
公开(公告)日：2015-06-30
申请号：US11825415
申请日：2007-07-06
申请人： Ahmad Mirzaei , Hooman Darabi
发明人： Ahmad Mirzaei , Hooman Darabi
IPC分类号： H04L27/00 , H04B1/10
CPC分类号： H04B1/1036
摘要： According to one exemplary embodiment, a transceiver for nullification of a noise component in a transmitter comprises a noise nullification module loading a selected node in the transmitter. The noise nullification module comprises a mixer that receives inputs from the selected node and a local oscillator, where the mixer is also coupled to a filter such that the noise nullification module presents a low impedance at an approximate frequency of a noise component so as to nullify the noise component. In one embodiment, the noise nullification module results in band-pass filtering of an approximate receive signal frequency so as to nullify a noise component at the receive frequency. In another embodiment, the noise nullification module results in notch filtering of an approximate transmit signal frequency so as to nullify a noise component at a receive signal frequency.

2. 发明授权

US08761696B2 Highly linear and very low-noise down-conversion mixer for extracting weak signals in the presence of very strong unwanted signals 有权
标题翻译：高线性和非常低噪声的下变频混频器，用于在存在非常强的无用信号的情况下提取弱信号
公开(公告)号：US08761696B2
公开(公告)日：2014-06-24
申请号：US12909472
申请日：2010-10-21
申请人： Ahmad Mirzaei , Hooman Darabi
发明人： Ahmad Mirzaei , Hooman Darabi
IPC分类号： H04B1/06 , H03C1/62
CPC分类号： G01F1/32 , H04B1/525
摘要： A method and system for wireless communication is provided and may include mitigating blocker signals in transmitted RF signals in a wireless device including a transmitter front end. The mitigation may include up-converting a baseband signal, mixing the up-converted baseband signal with a feedback signal, and amplifying the mixed up-converted baseband signal and the feedback signal to generate an output signal. The feedback signal may be generated by down-converting the output signal, low-pass filtering the down-converted output signal, and up-converting the filtered down-converted signal for the summing. The blocker signals may correspond to receive frequencies for the wireless device and may be converted to DC via the down-converting. The wireless devices may operate in accordance with at least a CDMA standard. The mixed up-converted baseband signal and the feedback signal may be amplified utilizing a source follower amplifier, where the gain and/or linearity may be configured by varying coupling capacitors.
摘要翻译：提供了一种用于无线通信的方法和系统，并且可以包括在包括发射机前端的无线设备中的发射的RF信号中减轻阻塞信号。缓解可以包括对基带信号进行上变频，将上变换的基带信号与反馈信号混合，以及放大混合上变换的基带信号和反馈信号以产生输出信号。反馈信号可以通过对输出信号进行下变频，低通滤波下变频输出信号，以及对滤波的下变频信号进行加法转换来产生。阻塞信号可以对应于无线设备的接收频率，并且可以经由下变频转换为DC。无线设备可以根据至少CDMA标准进行操作。混合上变频的基带信号和反馈信号可以利用源极跟随器放大器来放大，其中增益和/或线性可以通过改变耦合电容器来配置。

3. 发明授权

US08331881B2 Differential to single-ended converter 有权
标题翻译：差分到单端转换器
公开(公告)号：US08331881B2
公开(公告)日：2012-12-11
申请号：US12696845
申请日：2010-01-29
申请人： Dmitriy Rozenblit , Ahmad Mirzaei
发明人： Dmitriy Rozenblit , Ahmad Mirzaei
IPC分类号： H01Q11/12
CPC分类号： H04B1/04
摘要： Embodiments enable a multi-band transmitter with significantly reduced architecture area by allowing maximum reuse of transmitter stages across supported frequency bands and signal standards. Further, embodiments allow a monolithic transmitter implementation by providing an integration-friendly differential to single-ended conversion stage. According to embodiments, the differential to single-ended conversion stage is readily configurable according to the frequency band and signal standard of operation of the transmitter.
摘要翻译：通过允许在所支持的频带和信号标准上的发射机级的最大重用，实施例使得具有显着降低的架构区域的多频带发射机。此外，实施例允许通过向单端转换级提供集成友好的差分来实现单片发射机。根据实施例，差分到单端转换级可以根据发射机的频带和信号标准容易地配置。

4. 发明授权

US08325848B2 Peak detector having extended dynamic range 有权
标题翻译：峰值检测器具有扩展的动态范围
公开(公告)号：US08325848B2
公开(公告)日：2012-12-04
申请号：US12804319
申请日：2010-07-19
申请人： Ahmad Mirzaei , Hooman Darabi
发明人： Ahmad Mirzaei , Hooman Darabi
IPC分类号： H04L27/00
CPC分类号： H03K5/1532 , G01R21/01 , H03G3/3042 , H04B1/04
摘要： According to one embodiment, a peak detector having extended dynamic range comprises a first differential output coupled to a supply voltage of the peak detector by a first load and coupled to ground by first and second switching devices, and a second differential output coupled to the supply voltage by a second load and coupled to ground by third and fourth switching devices. The control terminals of the first, second, third, and fourth switching devices receive a common bias voltage, and the respective first and second control terminals are configured as differential inputs of the peak detector. In some embodiments, corresponding first power terminals of the first and second switching devices share a first common node further shared by the first differential output, and corresponding first power terminals of the third and fourth switching devices share a second common node further shared by the second differential output.
摘要翻译：根据一个实施例，具有扩展动态范围的峰值检测器包括第一差分输出，其通过第一负载耦合到峰值检测器的电源电压，并由第一和第二开关器件耦合到地，以及耦合到电源的第二差分输出电压由第二负载耦合并由第三和第四开关装置耦合到地。第一，第二，第三和第四开关器件的控制端子接收公共偏置电压，并且相应的第一和第二控制端子被配置为峰值检测器的差分输入。在一些实施例中，第一和第二开关器件的对应的第一电源端子共享由第一差分输出进一步共享的第一公共节点，并且第三和第四开关器件的对应的第一电源端子共享第二公共节点，差分输出。

5. 发明授权

US08237507B1 Method and system for transmitter linearization 失效
标题翻译：发射机线性化的方法和系统
公开(公告)号：US08237507B1
公开(公告)日：2012-08-07
申请号：US13047444
申请日：2011-03-14
申请人： Ahmad Mirzaei , Hooman Darabi
发明人： Ahmad Mirzaei , Hooman Darabi
IPC分类号： H03F3/04
CPC分类号： H03F1/3205 , H03F1/3211 , H03F3/211 , H03F3/45179 , H03F3/72 , H03F2200/357 , H03F2203/45541 , H03F2203/7236
摘要： Aspects of a method and system for transmitter linearization are provided. A signal may be amplified via one or more circuits comprising a first transistor having a first bias voltage applied to its gate via a resistor, and a second transistor having its source coupled to a first terminal of the resistor, its drain coupled to a second terminal of the resistor, and its gate coupled to a second bias voltage. The signal may be AC-coupled, via one or more capacitors, for example, to the gate of the first transistor. The first bias voltage and the second bias voltage may be such that the first transistor operates in the active region the second transistor operates in the subthreshold region. The effective channel width of the second transistor may be configurable during operation of the one or more circuits.
摘要翻译：提供发射机线性化的方法和系统的方面。信号可以经由一个或多个电路被放大，该电路包括经由电阻器施加到其栅极的第一偏置电压的第一晶体管，以及其源极耦合到电阻器的第一端子的第二晶体管，其漏极耦合到第二端子并且其栅极耦合到第二偏置电压。信号可以经由一个或多个电容器例如AC耦合到第一晶体管的栅极。第一偏置电压和第二偏置电压可以使得第一晶体管在有源区域中工作，第二晶体管在亚阈值区域中工作。在一个或多个电路的操作期间，第二晶体管的有效沟道宽度可以是可配置的。

6. 发明申请

US20120068743A1 Feedback-Based Linearization of Voltage Controlled Oscillator 有权
标题翻译：基于反馈的压控振荡器的线性化
公开(公告)号：US20120068743A1
公开(公告)日：2012-03-22
申请号：US13237571
申请日：2011-09-20
申请人： Michael YOUSSEF , Ahmad MIRZAEI , Hooman DARABI
发明人： Michael YOUSSEF , Ahmad MIRZAEI , Hooman DARABI
IPC分类号： H03L7/08
CPC分类号： H03L7/099 , H03L7/02 , H03L7/07 , H03L7/087 , H03L2207/05
摘要： Embodiments of the present invention enable a feedback-based VCO linearization technique. Embodiments include a frequency locked loop formed by feeding back a VCO's output into the VCO's input in negative phase by means of a frequency-to-voltage (F/V) converter. Embodiments enable constant VCO gain over a wide input tuning range and across PVT variations. Further, embodiments can be nested within a PLL, for example, with negligible area and power consumption overhead.
摘要翻译：本发明的实施例能够实现基于反馈的VCO线性化技术。实施例包括通过借助于频率 - 电压（F / V）转换器将VCO的输出反馈到VCO的负输入而形成的锁频环路。实施例能够在宽的输入调谐范围和PVT变化范围内实现恒定的VCO增益。此外，实施例可以嵌套在PLL内，例如具有可忽略的面积和功耗开销。

7. 发明申请

US20120046004A1 High performance transmitter preamplification chain with calibration feedback 有权
标题翻译：具有校准反馈的高性能变送器前置放大链
公开(公告)号：US20120046004A1
公开(公告)日：2012-02-23
申请号：US12806799
申请日：2010-08-19
申请人： Ahmad Mirzaei , Hooman Darabi , Amir Hadji-Abdolhamid
发明人： Ahmad Mirzaei , Hooman Darabi , Amir Hadji-Abdolhamid
IPC分类号： H04M1/00 , H03F3/45
CPC分类号： H03F3/45183 , H03F1/0277 , H03F3/189 , H03F3/195 , H03F3/211 , H03F3/245 , H03F3/72 , H03F2200/336 , H03F2200/36 , H03F2200/39 , H03F2200/408 , H03F2200/429 , H03F2200/435 , H03F2200/498 , H03F2200/534 , H03F2200/537 , H03F2200/541 , H03F2203/45394 , H03F2203/45512 , H03F2203/45526 , H03F2203/45528 , H03F2203/45544 , H03F2203/45592 , H03F2203/45594 , H03F2203/45631 , H03F2203/45701 , H03F2203/45702 , H03F2203/45728 , H03G1/0088 , H03G3/3042
摘要： According to one embodiment, an improved preamplification chain for implementation in a transmitter comprises a frequency conversion stage for up-converting a baseband signal to a transmit signal, a variable gain control power amplifier driver for preamplifying the transmit signal, and a differential feedback calibration stage receiving first and second differential outputs of a current steering unit of the power amplifier driver and providing calibration feedback to a baseband signal generator of the transmitter. In one embodiment, the frequency conversion stage includes an adjustable low-pass filter for filtering the baseband signal, a passive mixer for up-converting the baseband signal to the transmit signal, and a clock conversion unit configured to convert a fifty percent (50%) duty cycle clock input to a twenty-five percent (25%) duty cycle clock output for driving the passive mixer.
摘要翻译：根据一个实施例，用于在发射机中实现的改进的前置放大链包括用于将基带信号上变频到发射信号的变频级，用于对发射信号进行预放大的可变增益控制功率放大器驱动器和差分反馈校准级接收功率放大器驱动器的电流转向单元的第一和第二差分输出，并向发射机的基带信号发生器提供校准反馈。在一个实施例中，频率转换级包括用于对基带信号进行滤波的可调低通滤波器，用于将基带信号上变频为发射信号的无源混频器，以及时钟转换单元，被配置为将百分之五十（50％）占空比时钟输入到二十五％（25％）占空比时钟输出，用于驱动无源混频器。

8. 发明申请

US20110306391A1 Transmitter architecture enabling efficient preamplification gain control and related method 审中-公开
标题翻译：发射机架构，可实现高效的前置放大增益控制和相关方法
公开(公告)号：US20110306391A1
公开(公告)日：2011-12-15
申请号：US12802603
申请日：2010-06-09
申请人： Ahmad Mirzaei , Dmitriy Rozenblit , Hooman Darabi , Masoud Kahrizi
发明人： Ahmad Mirzaei , Dmitriy Rozenblit , Hooman Darabi , Masoud Kahrizi
IPC分类号： H04W52/04
CPC分类号： H03G3/3042
摘要： According to one embodiment, a radio frequency (RF) transceiver includes a transmitter enabling efficient preamplification gain control. The RF transceiver comprises a receiver and a power amplifier (PA) for amplifying a transmit signal of the transmitter. The transmitter is configured to provide pre-PA gain control for preamplifying the transmit signal before amplification by the PA, wherein substantially all of the pre-PA gain control is provided when the transmit signal is at a transmit frequency of the transmitter. In one embodiment, the transmitter includes a PA driver comprising in combination: a transconductance amplifier, a current steering block, and an output transformer. Each of the transconductance amplifier, current steering block, and output transformer is configured to contribute a respective variable gain control to the pre-PA gain control provided by the PA driver.
摘要翻译：根据一个实施例，射频（RF）收发器包括能够进行有效的前置放大增益控制的发射器。 RF收发器包括用于放大发射机的发射信号的接收机和功率放大器（PA）。发射器被配置为提供预PA增益控制，用于在PA放大之前对发射信号进行前置放大，其中当发射信号处于发射机的发射频率时，提供基本上所有的预PA增益控制。在一个实施例中，发射机包括PA驱动器，其包括：跨导放大器，电流转向块和输出变压器。跨导放大器，电流控制块和输出变压器中的每一个被配置为对由PA驱动器提供的前PA增益控制贡献相应的可变增益控制。

9. 发明申请

US20110299632A1 SAW-LESS RECEIVER WITH RF FREQUENCY TRANSLATED BPF 有权
标题翻译：具有RF频率翻转BPF的SAW接收器
公开(公告)号：US20110299632A1
公开(公告)日：2011-12-08
申请号：US13076183
申请日：2011-03-30
申请人： Ahmad Mirzaei , Hooman Darabi
发明人： Ahmad Mirzaei , Hooman Darabi
IPC分类号： H04L27/06
CPC分类号： H04B1/10 , H03F1/083 , H03F3/45179 , H04B1/006 , H04B1/1638 , H04B1/28 , H04B1/401
摘要： A SAW-less receiver includes an FEM interface module, an RF to IF receiver section, and a receiver IF to baseband section. The RF to IF receiver section includes a frequency translated bandpass filter (FTBPF), an LNA, and a mixing section. The FTBPF includes a switching network and a plurality of baseband impedances. The switching network is operable to couple the plurality of baseband impedances to the FEM interface in accordance with a plurality of phase-offset RF clock signals to RF bandpass filter the inbound RF signal. The LNA amplifies the filtered inbound RF signal and the mixing section mixes the amplified inbound RF signal with a local oscillation to produce an inbound IF signal. The receiver IF to baseband section converts the inbound IF signal into one or more inbound symbol streams.
摘要翻译：无SAW接收机包括FEM接口模块，RF至IF接收机部分和接收机IF到基带部分。 RF至IF接收器部分包括频率转换带通滤波器（FTBPF），LNA和混频部分。 FTBPF包括交换网络和多个基带阻抗。交换网络可操作以根据多个相位偏移RF时钟信号将多个基带阻抗耦合到FEM接口，以对入站RF信号进行RF带通滤波。 LNA放大滤波的入站RF信号，混合部分将放大的入站RF信号与本地振荡混频，以产生入站IF信号。接收机IF到基带部分将入站IF信号转换成一个或多个入站符号流。

10. 发明申请

US20110299631A1 SAW-LESS RECEIVER INCLUDING TRANSIMPEDANCE AMPLIFIERS 有权
标题翻译：无SAW接收器，包括转移放大器
公开(公告)号：US20110299631A1
公开(公告)日：2011-12-08
申请号：US13076143
申请日：2011-03-30
申请人： Ahmad Mirzaei , Hooman Darabi
发明人： Ahmad Mirzaei , Hooman Darabi
IPC分类号： H04L27/06
CPC分类号： H04L27/36
摘要： A SAW-less receiver includes an FEM interface module, an RF to IF receiver section, and a receiver IF to baseband section. The RF to IF receiver section includes inverter based LNA modules, a mixing module, and transimpedance amplifier modules. The inverter based LNA modules amplify inbound RF signal to produce a positive leg current RF signal and a negative leg current RF signal. The mixing module converts the positive and negative leg current RF signals into an in-phase (I) mixed current signal and a quadrature (Q) mixed current signal. The transimpedance amplifier modules convert the I mixed current signal into an I mixed voltage signal and the Q mixed current signal into a Q mixed voltage signal. The receiver IF to baseband section converts the I and Q mixed voltage signals into one or more inbound symbol streams.
摘要翻译：无SAW接收机包括FEM接口模块，RF至IF接收机部分和接收机IF到基带部分。 RF至IF接收器部分包括基于反相器的LNA模块，混频模块和跨阻放大器模块。基于逆变器的LNA模块放大入站RF信号以产生正脚电流RF信号和负脚电流RF信号。混合模块将正极和负极脚电流RF信号转换为同相（I）混合电流信号和正交（Q）混合电流信号。跨阻放大器模块将I混合电流信号转换为I混合电压信号，将Q混合电流信号转换为Q混合电压信号。接收机IF到基带部分将I和Q混合电压信号转换成一个或多个入站符号流。

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