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1. 发明申请

US20110050285A1 HIGH LINEAR FAST PEAK DETECTOR 有权
标题翻译：高线性快速探测器
公开(公告)号：US20110050285A1
公开(公告)日：2011-03-03
申请号：US12718806
申请日：2010-03-05
申请人： Wenjun Su , Aristotele Hadjichristos , Marco Cassia , Chiewcham Narathong
发明人： Wenjun Su , Aristotele Hadjichristos , Marco Cassia , Chiewcham Narathong
IPC分类号： G01R19/04
CPC分类号： G01R19/04
摘要： A high linear fast peak detector having a variable bias current and/or a variable bias voltage is described. In an exemplary design, the peak detector includes a transistor, a variable current source, a capacitor, and a feedback circuit. The transistor receives the input signal and provides a source current. The variable current source receives the input signal, provides high bias current when the input signal is low, and provides low bias current when the input signal is high. The capacitor is charged by the source current when the input signal is high and is discharged by the high bias current when the input signal is low. The feedback circuit receives a detected signal from the capacitor and provides higher bias voltage for the transistor when the input signal is high, which results in higher source current from the transistor.
摘要翻译：描述具有可变偏置电流和/或可变偏置电压的高线性快速峰值检测器。在示例性设计中，峰值检测器包括晶体管，可变电流源，电容器和反馈电路。晶体管接收输入信号并提供源极电流。可变电流源接收输入信号，当输入信号为低电平时提供高偏置电流，并且当输入信号为高电平时提供低偏置电流。当输入信号为高电平时，电容器由电源电流充电，当输入信号为低电平时，电容器被高偏置电流放电。当输入信号为高电平时，反馈电路接收来自电容器的检测信号，并为晶体管提供更高的偏置电压，这导致来自晶体管的较高的源极电流。

2. 发明授权

US09559639B2 Protection circuit for power amplifier 有权
标题翻译：功率放大器保护电路
公开(公告)号：US09559639B2
公开(公告)日：2017-01-31
申请号：US12715250
申请日：2010-03-01
申请人： Wenjun Su , Aristotele Hadjichristos , Gurkanwal S. Sahota , Marco Cassia
发明人： Wenjun Su , Aristotele Hadjichristos , Gurkanwal S. Sahota , Marco Cassia
IPC分类号： H04B1/04 , H03F1/52 , H03F3/24 , H03G3/30
CPC分类号： H03F1/52 , H03F3/24 , H03F2200/435 , H03F2200/78 , H03G3/3042 , H04B2001/0408
摘要： Techniques for protecting a power amplifier (PA) are described. In an exemplary design, an apparatus includes (i) a PA module to amplify an input RF signal and provide an output RF signal and (ii) a protection circuit to control a transmitter gain to protect the PA module against high peak voltage. In an exemplary design, the protection circuit includes a set of comparators to quantize an analog input signal and provide digital comparator output signals used to adjust the transmitter gain. In another exemplary design, the protection circuit reduces and increases the transmitter gain with hysteresis. In yet another exemplary design, the protection circuit has faster response to rising amplitude than falling amplitude of the output RF signal. The hysteresis and/or the different rise and fall responses may allow the protection circuit to avoid toggling the transmitter gain under severe load mismatch and to handle time-varying envelope due to amplitude modulation.
摘要翻译：描述了用于保护功率放大器（PA）的技术。在示例性设计中，装置包括（i）PA模块，用于放大输入RF信号并提供输出RF信号，以及（ii）保护电路以控制发射机增益以保护PA模块免受高峰值电压。在示例性设计中，保护电路包括一组比较器，用于量化模拟输入信号并提供用于调整发射机增益的数字比较器输出信号。在另一示例性设计中，保护电路通过滞后减小并增加发射机增益。在又一示例性设计中，保护电路比对输出RF信号的下降幅度具有对振幅上升的响应更快。迟滞和/或不同的上升和下降响应可以允许保护电路避免在严重负载不匹配的情况下切换发射机增益，并且由于幅度调制来处理时变包络。

3. 发明授权

US08310277B2 High linear fast peak detector 有权
标题翻译：高线性快速峰值检测器
公开(公告)号：US08310277B2
公开(公告)日：2012-11-13
申请号：US12718806
申请日：2010-03-05
申请人： Wenjun Su , Aristotele Hadjichristos , Marco Cassia , Chiewcharn Narathong
发明人： Wenjun Su , Aristotele Hadjichristos , Marco Cassia , Chiewcharn Narathong
IPC分类号： H03K5/153
CPC分类号： G01R19/04
摘要： A high linear fast peak detector having a variable bias current and/or a variable bias voltage is described. In an exemplary design, the peak detector includes a transistor, a variable current source, a capacitor, and a feedback circuit. The transistor receives the input signal and provides a source current. The variable current source receives the input signal, provides high bias current when the input signal is low, and provides low bias current when the input signal is high. The capacitor is charged by the source current when the input signal is high and is discharged by the high bias current when the input signal is low. The feedback circuit receives a detected signal from the capacitor and provides higher bias voltage for the transistor when the input signal is high, which results in higher source current from the transistor.
摘要翻译：描述具有可变偏置电流和/或可变偏置电压的高线性快速峰值检测器。在示例性设计中，峰值检测器包括晶体管，可变电流源，电容器和反馈电路。晶体管接收输入信号并提供源极电流。可变电流源接收输入信号，当输入信号为低电平时提供高偏置电流，并且当输入信号为高电平时提供低偏置电流。当输入信号为高电平时，电容器由电源电流充电，当输入信号为低电平时，电容器被高偏置电流放电。当输入信号为高电平时，反馈电路接收来自电容器的检测信号，并为晶体管提供较高的偏置电压，这导致来自晶体管的较高的源极电流。

4. 发明申请

US20110043956A1 PROTECTION CIRCUIT FOR POWER AMPLIFIER 有权
标题翻译：功率放大器保护电路
公开(公告)号：US20110043956A1
公开(公告)日：2011-02-24
申请号：US12715250
申请日：2010-03-01
申请人： Wenjun Su , Aristotele Hadjichristos , Gurkanwal S. Sahota , Marco Cassia
发明人： Wenjun Su , Aristotele Hadjichristos , Gurkanwal S. Sahota , Marco Cassia
IPC分类号： H02H3/20
CPC分类号： H03F1/52 , H03F3/24 , H03F2200/435 , H03F2200/78 , H03G3/3042 , H04B2001/0408
摘要： Techniques for protecting a power amplifier (PA) are described. In an exemplary design, an apparatus includes (i) a PA module to amplify an input RF signal and provide an output RF signal and (ii) a protection circuit to control a transmitter gain to protect the PA module against high peak voltage. In an exemplary design, the protection circuit includes a set of comparators to quantize an analog input signal and provide digital comparator output signals used to adjust the transmitter gain. In another exemplary design, the protection circuit reduces and increases the transmitter gain with hysteresis. In yet another exemplary design, the protection circuit has faster response to rising amplitude than falling amplitude of the output RF signal. The hysteresis and/or the different rise and fall responses may allow the protection circuit to avoid toggling the transmitter gain under severe load mismatch and to handle time-varying envelope due to amplitude modulation.
摘要翻译：描述了用于保护功率放大器（PA）的技术。在示例性设计中，装置包括（i）PA模块，用于放大输入RF信号并提供输出RF信号，以及（ii）保护电路以控制发射机增益以保护PA模块免受高峰值电压。在示例性设计中，保护电路包括一组比较器，用于量化模拟输入信号并提供用于调整发射机增益的数字比较器输出信号。在另一示例性设计中，保护电路通过滞后减小并增加发射机增益。在又一示例性设计中，保护电路比对输出RF信号的下降幅度具有对振幅上升的响应更快。迟滞和/或不同的上升和下降响应可以允许保护电路避免在严重负载不匹配的情况下切换发射机增益，并且由于幅度调制来处理时变包络。

5. 发明授权

US08150339B2 Switchable-level voltage supplies for multimode communications 有权
标题翻译：用于多模通信的可切换电平电压源
公开(公告)号：US08150339B2
公开(公告)日：2012-04-03
申请号：US11935200
申请日：2007-11-05
申请人： Marco Cassia , Aristotele Hadjichristos
发明人： Marco Cassia , Aristotele Hadjichristos
IPC分类号： H04B1/04 , H04M1/00
CPC分类号： H04B1/0475 , H03F1/02 , H03F1/0244 , H03F3/24 , H03F3/45475 , H03F2203/45731 , H04B1/0057 , H04B1/406 , H04B2001/045
摘要： Switchable voltage level supplies for circuitry in a multi-mode communications chipset are disclosed. In an embodiment, a first voltage level is supplied to TX circuitry operating in a first mode having a first set of linearity and/or noise requirements. A second voltage level lower than the first voltage level is supplied to TX circuitry operating in a second mode having a second set of linearity and/or noise requirements looser than the first set of requirements. The first mode may be operation according to the GSM standard, and the second mode may be operation according to the W-CDMA standard.
摘要翻译：公开了一种用于多模式通信芯片组中的电路的可切换电压电平。在一个实施例中，向具有第一组线性和/或噪声要求的第一模式工作的TX电路提供第一电压电平。低于第一电压电平的第二电压电平被提供给具有比第一组要求松动的第二组线性和/或噪声要求的第二模式工作的TX电路。第一模式可以是根据GSM标准的操作，并且第二模式可以是根据W-CDMA标准的操作。

6. 发明授权

US08160514B2 Transmission noise cancellation 有权
标题翻译：传输噪声消除
公开(公告)号：US08160514B2
公开(公告)日：2012-04-17
申请号：US12180350
申请日：2008-07-25
申请人： Vladimir Aparin , Aristotele Hadjichristos , Marco Cassia
发明人： Vladimir Aparin , Aristotele Hadjichristos , Marco Cassia
IPC分类号： H04B1/04 , H04B17/00
CPC分类号： H04B1/0475 , H03F1/34 , H03F3/24 , H04B2001/0433
摘要： Exemplary embodiments of the disclosure are directed to down-converting an RF signal of a transmitter to baseband, filtering the down-converted signal, and generating a composite signal based on the filtered down-converted signal and a transmission based-band signal.
摘要翻译：本公开的示例性实施例涉及将发射机的RF信号下变频到基带，对下变频信号进行滤波，并且基于滤波的下变频信号和基于传输的频带信号来生成复合信号。

7. 发明申请

US20100022206A1 TRANSMISSION NOISE CANCELLATION 有权
标题翻译：传输噪声消除
公开(公告)号：US20100022206A1
公开(公告)日：2010-01-28
申请号：US12180350
申请日：2008-07-25
申请人： Vladimir Aparin , Aristotele Hadjichristos , Marco Cassia
发明人： Vladimir Aparin , Aristotele Hadjichristos , Marco Cassia
IPC分类号： H04B1/04
CPC分类号： H04B1/0475 , H03F1/34 , H03F3/24 , H04B2001/0433
摘要： Exemplary embodiments of the disclosure are directed to down-converting an RF signal of a transmitter to baseband, filtering the down-converted signal, and generating a composite signal based on the filtered down-converted signal and a transmission based-band signal.
摘要翻译：本公开的示例性实施例涉及将发射机的RF信号下变频到基带，对下变频信号进行滤波，并且基于滤波的下变频信号和基于传输的频带信号来生成复合信号。

8. 发明授权

US08779859B2 Multi-cascode amplifier bias techniques 有权
标题翻译：多共源共栅放大器偏置技术
公开(公告)号：US08779859B2
公开(公告)日：2014-07-15
申请号：US13570062
申请日：2012-08-08
申请人： Wenjun Su , Chiewcharn Narathong , Guangming Yin , Aristotele Hadjichristos
发明人： Wenjun Su , Chiewcharn Narathong , Guangming Yin , Aristotele Hadjichristos
IPC分类号： H03F1/22
CPC分类号： H03F1/223 , H03F3/193
摘要： Techniques for generating bias voltages for a multi-cascode amplifier. In an aspect, a multi-cascode bias network is provided, each transistor in the bias network being a replica of a corresponding transistor in the multi-cascode amplifier, enabling accurate biasing of the transistors in the multi-cascode amplifier. In another aspect, a voltage supply for the multi-cascode amplifier is provided separately from a voltage supply for the replica bias network, to advantageously decouple variations in the amplifier voltage supply from the bias network voltage supply. In yet another aspect, the bias voltages of transistors in the multi-cascode amplifier may be configured by adjusting the impedance of resistive voltage dividers coupled to the transistor gate biases. As the gain of the amplifier depends on the bias voltages of the cascode amplifiers, the gain of the amplifier may be adjusted in this manner without introducing a variable gain element directly in the amplifier signal path.
摘要翻译：用于产生多共源共栅放大器偏置电压的技术。在一方面，提供了一种多共源共栅偏压网络，偏置网络中的每个晶体管是多共源共栅放大器中对应的晶体管的复制品，使多级共源共栅放大器中的晶体管能够精确偏置。在另一方面，用于多重共源共栅放大器的电压源与用于复制偏压网络的电压源分开提供，以有利地将放大器电压源与偏置网络电压源的变化分离。在另一方面，多并联放大器中的晶体管的偏置电压可以通过调整耦合到晶体管栅极偏置的电阻分压器的阻抗来配置。由于放大器的增益取决于共源共栅放大器的偏置电压，所以可以以这种方式调节放大器的增益，而不将可变增益元件直接引入放大器信号路径。

9. 发明授权

US07851947B2 Methods and apparatuses for selectable voltage supply 有权
标题翻译：用于可选电压供应的方法和装置
公开(公告)号：US07851947B2
公开(公告)日：2010-12-14
申请号：US11935186
申请日：2007-11-05
申请人： Marco Cassia , Aristotele Hadjichristos , Conor Donovan , Sang-Oh Lee
发明人： Marco Cassia , Aristotele Hadjichristos , Conor Donovan , Sang-Oh Lee
IPC分类号： H02B1/24
CPC分类号： H03K17/693 , Y10T307/696 , Y10T307/747
摘要： A circuit which selects a supply voltage from a plurality of voltage supplies is presented. The circuit includes a first transistor configured to select a first voltage supply, a second transistor configured to select a second voltage supply, a first parasitic current inhibitor coupled the first transistor, the first voltage supply, and the second voltage supply, where the first parasitic current inhibitor automatically utilizes the voltage supply providing the highest voltage for preventing a substrate current from flowing through a bulk node of the first transistor, and a second parasitic current inhibitor coupled the second transistor, the first voltage supply, and the second voltage supply, where the second parasitic current inhibitor automatically utilizes the voltage supply providing the highest voltage for preventing a substrate current from flowing through a bulk node of the second transistor.
摘要翻译：提出了从多个电压源中选择电源电压的电路。该电路包括：第一晶体管，被配置为选择第一电压源;第二晶体管，被配置为选择第二电压源;耦合第一晶体管，第一电压源和第二电压源的第一寄生电流抑制器，其中第一寄生电流抑制器自动地利用提供最高电压的电压源来防止衬底电流流过第一晶体管的体节点，以及耦合第二晶体管，第一电压源和第二电压源的第二寄生电流抑制器，其中第二寄生电流抑制器自动利用提供最高电压的电压源来防止衬底电流流过第二晶体管的体节点。

10. 发明申请

US20100291888A1 MULTI-MODE MULTI-BAND POWER AMPLIFIER MODULE 有权
标题翻译：多模多功率放大器模块
公开(公告)号：US20100291888A1
公开(公告)日：2010-11-18
申请号：US12575414
申请日：2009-10-07
申请人： Aristotele Hadjichristos , Puay Hoe See , Babak Nejati , Guy Klemens , Norman Frederick, JR. , Gurkanwal Singh Sahota , Marco Cassia , Nathan Pletcher , Yu Zhao , Thomas Myers
发明人： Aristotele Hadjichristos , Puay Hoe See , Babak Nejati , Guy Klemens , Norman Frederick, JR. , Gurkanwal Singh Sahota , Marco Cassia , Nathan Pletcher , Yu Zhao , Thomas Myers
IPC分类号： H04B1/04
CPC分类号： H04B1/0458 , H03F1/0277 , H03F3/24 , H03F3/72 , H03F2203/7236 , H04B1/0483
摘要： A multi-mode multi-band power amplifier (PA) module is described. In an exemplary design, the PA module includes multiple power amplifiers, multiple matching circuits, and a set of switches. Each power amplifier provides power amplification for its input signal when selected. Each matching circuit provides impedance matching and filtering for its power amplifier and provides a respective output signal. The switches configure the power amplifiers to support multiple modes, with each mode being for a particular radio technology. Each power amplifier supports at least two modes. The PA module may further include a driver amplifier and an additional matching circuit. The driver amplifier amplifies an input signal and provides an amplified signal to the power amplifiers. The additional matching circuit combines the outputs of other matching circuits and provides an output signal with higher output power. The driver amplifier and the power amplifiers can support multiple output power levels.
摘要翻译：描述了多模式多频带功率放大器（PA）模块。在示例性设计中，PA模块包括多个功率放大器，多个匹配电路和一组开关。每个功率放大器在选择时为其输入信号提供功率放大。每个匹配电路为其功率放大器提供阻抗匹配和滤波，并提供相应的输出信号。这些开关配置功率放大器以支持多种模式，每种模式都适用于特定的无线电技术。每个功率放大器至少支持两种模式。 PA模块还可以包括驱动器放大器和附加匹配电路。驱动器放大器放大输入信号并向功率放大器提供放大的信号。附加匹配电路组合其他匹配电路的输出，并提供具有较高输出功率的输出信号。驱动器放大器和功率放大器可以支持多个输出功率电平。

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