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公开(公告)号：US07323944B2
公开(公告)日：2008-01-29
申请号：US11103743
申请日：2005-04-11
CPC分类号： H03L7/199 , H03L7/0898 , H03L7/10
摘要： A PLL includes a charge pump, a loop filter, a VCO, and a calibration unit. The calibration unit performs coarse tuning to select one or multiple frequency ranges, performs fine tuning to determine an initial control voltage that puts the VCO near a desired operating frequency, measures the VCO gain at different control voltages, and derives VCO gain compensation values for the different control voltages. The calibration unit also pre-charges the loop filter to the initial control voltage to shorten acquisition time, enables the loop filter to drive the VCO to lock to the desired operating frequency, and performs VCO gain compensation during normal operation. For VCO gain compensation, the calibration unit measures the control voltage, obtains the VCO gain compensation value for the measured control voltage, and adjusts the gain of at least one circuit block (e.g., the charge pump) to account for variation in the VCO gain.
摘要翻译： PLL包括电荷泵，环路滤波器，VCO和校准单元。 校准单元执行粗调以选择一个或多个频率范围，执行微调以确定将VCO置于所需工作频率附近的初始控制电压，测量不同控制电压下的VCO增益，并导出VCO增益补偿值 不同的控制电压。 校准单元还将环路滤波器预充电到初始控制电压以缩短采集时间，使环路滤波器能够驱动VCO锁定到所需的工作频率，并在正常操作期间执行VCO增益补偿。 对于VCO增益补偿，校准单元测量控制电压，获得测量的控制电压的VCO增益补偿值，并调整至少一个电路块（例如，电荷泵）的增益，以考虑VCO增益的变化 。
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公开(公告)号：US20060226916A1
公开(公告)日：2006-10-12
申请号：US11103743
申请日：2005-04-11
IPC分类号： H03L7/00
CPC分类号： H03L7/199 , H03L7/0898 , H03L7/10
摘要： A PLL includes a charge pump, a loop filter, a VCO, and a calibration unit. The calibration unit performs coarse tuning to select one or multiple frequency ranges, performs fine tuning to determine an initial control voltage that puts the VCO near a desired operating frequency, measures the VCO gain at different control voltages, and derives VCO gain compensation values for the different control voltages. The calibration unit also pre-charges the loop filter to the initial control voltage to shorten acquisition time, enables the loop filter to drive the VCO to lock to the desired operating frequency, and performs VCO gain compensation during normal operation. For VCO gain compensation, the calibration unit measures the control voltage, obtains the VCO gain compensation value for the measured control voltage, and adjusts the gain of at least one circuit block (e.g., the charge pump) to account for variation in the VCO gain.
摘要翻译： PLL包括电荷泵，环路滤波器，VCO和校准单元。 校准单元执行粗调以选择一个或多个频率范围，执行微调以确定将VCO置于所需工作频率附近的初始控制电压，测量不同控制电压下的VCO增益，并导出VCO增益补偿值 不同的控制电压。 校准单元还将环路滤波器预充电到初始控制电压以缩短采集时间，使环路滤波器能够驱动VCO锁定到所需的工作频率，并在正常操作期间执行VCO增益补偿。 对于VCO增益补偿，校准单元测量控制电压，获得测量的控制电压的VCO增益补偿值，并调整至少一个电路块（例如，电荷泵）的增益，以考虑VCO增益的变化 。
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公开(公告)号：US08929840B2
公开(公告)日：2015-01-06
申请号：US12209164
申请日：2008-09-11
申请人： Sankaran Aniruddhan , Chiewcharn Narathong , Sriramgopal Sridhara , Ravi Sridhara , Gurkanwal Singh Sahota , Frederic Bossu , Ojas M. Choksi
发明人： Sankaran Aniruddhan , Chiewcharn Narathong , Sriramgopal Sridhara , Ravi Sridhara , Gurkanwal Singh Sahota , Frederic Bossu , Ojas M. Choksi
CPC分类号： H03D7/166 , H03D7/1441 , H03D7/1483 , H03D7/165 , H03D2200/0025 , H03G3/3052
摘要： Selectable sizes for a local oscillator (LO) buffer and mixer are disclosed. In an exemplary embodiment, LO buffer and/or mixer size may be increased when a receiver or transmitter operates in a high gain mode, while LO buffer and/or mixer size may be decreased when the receiver or transmitter operates in a low gain mode. In an exemplary embodiment, LO buffer and mixer sizes are increased and decreased in lock step. Circuit topologies and control schemes for specific exemplary embodiments of LO buffers and mixers having adjustable size are disclosed.
摘要翻译： 公开了本地振荡器（LO）缓冲器和混频器的可选尺寸。 在示例性实施例中，当接收机或发射机以高增益模式工作时，可以增加LO缓冲器和/或混频器大小，而当接收机或发射机以低增益模式工作时，LO缓冲器和/或混频器大小可能会减小。 在示例性实施例中，锁定步骤中LO缓冲器和混合器尺寸增加和减小。 公开了具有可调节尺寸的LO缓冲器和混合器的具体示例性实施例的电路拓扑和控制方案。
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4.发明授权Spur cancellation in a digital baseband transmit signal using cancelling tones 有权使用取消音调的数字基带发射信号中的支线消除公开(公告)号：US08331485B2
公开(公告)日：2012-12-11
申请号：US12822930
申请日：2010-06-24
申请人： Yiwu Tang , Chiewcharn Narathong
发明人： Yiwu Tang , Chiewcharn Narathong
CPC分类号： H04L25/03343 , H03F1/32 , H03F3/195 , H03F3/24 , H03F2200/411 , H03F2200/451 , H03F2200/534 , H04L27/368
摘要： A method for reducing spurs within a transmit signal is disclosed. A cancelling tone is determined. The cancelling tone is added to a baseband transmit signal in the digital domain to obtain a baseband transmit signal with cancelling tone. A spur in the transmit signal is reduced using the cancelling tone. The transmit signal with the reduced spur is transmitted using an antenna.
摘要翻译： 公开了一种用于减少发射信号内的杂散的方法。 确定取消音。 将抵消音增加到数字域中的基带发送信号，以获得具有消除音的基带发送信号。 发送信号中的杂散使用消除音降低。 具有减小的杂散的发射信号使用天线发射。
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公开(公告)号：US08310277B2
公开(公告)日：2012-11-13
申请号：US12718806
申请日：2010-03-05
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。
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6.发明申请RECONFIGURABLE LOCAL OSCILLATOR FOR OPTIMAL NOISE PERFORMANCE IN A MULTI-STANDARD TRANSCEIVER 有权可重构的本地振荡器，用于多标准收发器中的最佳噪声性能公开(公告)号：US20120082151A1
公开(公告)日：2012-04-05
申请号：US12898104
申请日：2010-10-05
CPC分类号： H03L7/1976 , H03B5/1212 , H03B5/1228 , H03B5/1243 , H03L7/093 , H03L7/099 , H03L7/104 , H04B1/0057
摘要： A transceiver for multi-standard operation (usable, for example, to communicate signals both of a first wireless communication standard and of a second wireless communication standard) has a mixer that receives a local oscillator signal generated by a local oscillator. A PLL of the local oscillator involves a VCO, a digitally programmable analog loop filter, a digitally programmable VCO supply voltage circuit, and a digitally programmable VCO varactor bias control circuit. In one aspect, the bandwidth of the analog loop filter is adjusted depending on the communication standard of the signal being communicated. In other aspects, the VCO supply voltage circuit and/or the varactor bias control circuit are configured in different ways to optimize PLL performance depending on the communication standard of the signal being communicated.
摘要翻译： 用于多标准操作的收发器（例如可用于传送第一无线通信标准和第二无线通信标准的信号）具有接收由本地振荡器产生的本地振荡器信号的混合器。 本地振荡器的PLL包括VCO，数字可编程模拟环路滤波器，数字可编程VCO电源电压电路和数字可编程VCO变容二极管偏置控制电路。 在一个方面，模拟环路滤波器的带宽根据正在传送的信号的通信标准来调节。 在其他方面，VCO电源电压电路和/或变容二极管偏置控制电路以不同的方式配置，以根据正在通信的信号的通信标准优化PLL性能。
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公开(公告)号：US20120081188A1
公开(公告)日：2012-04-05
申请号：US12897918
申请日：2010-10-05
申请人： Li Liu , Chiewcharn Narathong
发明人： Li Liu , Chiewcharn Narathong
CPC分类号： H03L1/025 , H03B5/04 , H03B5/1212 , H03B5/1228 , H03B5/1243 , H03B5/1265 , H03L1/023 , H03L7/099 , H03L7/104 , H03L7/1976
摘要： A resonator of a VCO includes a fine tuning main varactor circuit, an auxiliary varactor circuit, and a coarse tuning capacitor bank circuit coupled in parallel with an inductance. The main varactor circuit includes a plurality of circuit portions that can be separately disabled. Within each circuit portion is a multiplexing circuit that supplies a selectable one of either a fine tuning control signal (FTAVCS) or a temperature compensation control signal (TCAVCS) onto a varactor control node within the circuit portion. If the circuit portion is enabled then the FTAVCS is supplied onto the control node so that the circuit portion is used for fine tuning. If the circuit portion is disabled then the TCAVCS is supplied onto the control node so that the circuit portion is used to combat VCO frequency drift as a function of temperature. How the voltage of the TCAVCS varies with temperature is digitally programmable.
摘要翻译： VCO的谐振器包括微调主变容二极管电路，辅助变容二极管电路和与电感并联耦合的粗调电容器组电路。 主变容二极管包括多个电路部分，其可以单独禁用。 在每个电路部分内是多路复用电路，其将微调控制信号（FTAVCS）或温度补偿控制信号（TCAVCS）中的可选择的一个提供到电路部分内的变容二极管控制节点上。 如果电路部分被使能，则FTAVCS被提供到控制节点上，使得电路部分被用于微调。 如果电路部分被禁用，则TCAVCS被提供到控制节点上，使得电路部分用于抵抗作为温度的函数的VCO频率漂移。 TCAVCS的电压如何随温度而变化是可数字编程的。
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公开(公告)号：US20100182090A1
公开(公告)日：2010-07-22
申请号：US12355860
申请日：2009-01-19
申请人： Zixiang Yang , Chiewcharn Narathong , Bo Sun
发明人： Zixiang Yang , Chiewcharn Narathong , Bo Sun
IPC分类号： H03F3/16
CPC分类号： H03F3/193 , H03F1/3205 , H03F1/3211 , H03F3/45183 , H03F3/72 , H03F2200/294 , H03F2200/451 , H03F2203/45386 , H03F2203/45481 , H03F2203/7221
摘要： An amplifier for operating at low, middle or high linearity modes, the amplifier comprising a first low noise amplifier (LNA) coupled to a second low noise amplifier for providing amplification; a first degeneration inductor coupled to the first LNA for providing impedance matching; a −g3 generation block coupled to an output of the second LNA for canceling third-order transconductance distortion; and a first enabling/disabling component coupled to the output of the second LNA and aligned in parallel with the −g3 generation block for operating at least one of the first and second LNAs at one of the low, middle or high linearity modes.
摘要翻译： 一种用于在低，中或高线性模式下操作的放大器，所述放大器包括耦合到第二低噪声放大器以提供放大的第一低噪声放大器（LNA） 耦合到第一LNA的第一退化电感器，用于提供阻抗匹配; 耦合到所述第二LNA的输出以消除三阶跨导失真的-g3生成块; 以及耦合到第二LNA的输出并且与-g3生成块并行对准的第一使能/禁用组件，用于在低，中或高线性模式中的一个模式下操作第一和第二LNA中的至少一个。
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9.发明授权Configurable multi-modulus frequency divider for multi-mode mobile communication devices 有权用于多模式移动通信设备的可配置多模式分频器公开(公告)号：US07379522B2
公开(公告)日：2008-05-27
申请号：US11472824
申请日：2006-06-21
申请人： Chiewcharn Narathong , Wenjun Su
发明人： Chiewcharn Narathong , Wenjun Su
CPC分类号： H03L7/1976 , H03L7/0802
摘要： Within a mobile communication device (for example, a cellular telephone), there is a local oscillator. The local oscillator includes a novel frequency divider that includes a novel configurable multi-modulus divider (CMMD). The frequency divider is configurable into a selectable one of multiple configurations involving different mixes of synchronous and asynchronous circuitry. In each configuration, the frequency divider produces an amount of noise and consumes an amount of power. Power consumption is loosely inversely related to noise produced in that the modes with the highest power consumption produce the least amount of noise, and vice versa. The mobile communication device is operable in one of multiple different communication standards (for example, GSM, CDMA1X and WCDMA). The different communication standards impose different noise requirements on the frequency divider. By using the lowest power configuration that satisfies the noise requirements of the standard being used, power consumption of the cellular telephone is reduced.
摘要翻译： 在移动通信设备（例如，蜂窝电话）内，存在本地振荡器。 本地振荡器包括一种新颖的分频器，其包括新颖的可配置多模分频器（CMMD）。 分频器可配置为包括不同混频器的同步和异步电路的多种配置之一。 在每个配置中，分频器产生一定量的噪声并消耗一定的功率。 功耗与产生的噪声松散地负相关，因为功耗最大的模式产生的噪声最小，反之亦然。 移动通信设备可以在多个不同通信标准（例如，GSM，CDMA1X和WCDMA）之一中操作。 不同的通信标准对分频器施加不同的噪声要求。 通过使用满足所使用的标准的噪声要求的最低功率配置，蜂窝电话的功耗降低。
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10.发明授权Reconfigurable local oscillator for optimal noise performance in a multi-standard transceiver 有权可重构本地振荡器，可在多标准收发器中实现最佳噪声性能公开(公告)号：US09344100B2
公开(公告)日：2016-05-17
申请号：US12898104
申请日：2010-10-05
CPC分类号： H03L7/1976 , H03B5/1212 , H03B5/1228 , H03B5/1243 , H03L7/093 , H03L7/099 , H03L7/104 , H04B1/0057
摘要： A transceiver for multi-standard operation (usable, for example, to communicate signals both of a first wireless communication standard and of a second wireless communication standard) has a mixer that receives a local oscillator signal generated by a local oscillator. A PLL of the local oscillator involves a VCO, a digitally programmable analog loop filter, a digitally programmable VCO supply voltage circuit, and a digitally programmable VCO varactor bias control circuit. In one aspect, the bandwidth of the analog loop filter is adjusted depending on the communication standard of the signal being communicated. In other aspects, the VCO supply voltage circuit and/or the varactor bias control circuit are configured in different ways to optimize PLL performance depending on the communication standard of the signal being communicated.
摘要翻译： 用于多标准操作的收发器（例如可用于传送第一无线通信标准和第二无线通信标准的信号）具有接收由本地振荡器产生的本地振荡器信号的混合器。 本地振荡器的PLL包括VCO，数字可编程模拟环路滤波器，数字可编程VCO电源电压电路和数字可编程VCO变容二极管偏置控制电路。 在一个方面，模拟环路滤波器的带宽根据正在传送的信号的通信标准来调节。 在其他方面，VCO电源电压电路和/或变容二极管偏置控制电路以不同的方式配置，以根据正在通信的信号的通信标准优化PLL性能。
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