公开(公告)号：US09939471B1

公开(公告)日：2018-04-10

申请号：US14872118

申请日：2015-09-30

申请人： Technology for Energy Corp.

发明人： Kevin Christopher Omoumi ,  Allen Vaughn Blalock

IPC分类号： G01R11/32 ,  G01R21/06 ,  H03F3/45

CPC分类号： G01R21/06 ,  G01R22/08 ,  G01R35/04 ,  H03C1/06 ,  H03F3/45076 ,  H03F2203/45116 ,  H03K5/02 ,  H03K5/24

摘要： A power measurement system, including a voltage measurement circuit having a resistive network comprising first and second resistors connected in series on a first single substrate, and a feedback amplifier having an input in electrical communication with a point between the first and second resistors, and an output in electrical communication with the second resistor in a feedback configuration to output an attenuated voltage signal, and a transresistance current measurement circuit including a current transformer to transform an input primary current into a secondary current, a plurality of amplifiers configured in a cascading arrangement, and a feedback resistor configured in parallel with the cascaded amplifiers such that the combined gain of the cascaded amplifiers directs substantially all of the secondary current through the feedback resistor, wherein the system is selectively switchable between a voltage measurement mode and a current measurement mode.

公开(公告)号：US09660621B1

公开(公告)日：2017-05-23

申请号：US14872056

申请日：2015-09-30

申请人： Technology for Energy Corporation

发明人： Kevin Christopher Omoumi ,  Allen Vaughn Blalock ,  Kai Bouse

IPC分类号： G01R1/38 ,  H03K5/02 ,  H03K5/24

CPC分类号： G01R21/06 ,  G01R22/08 ,  G01R35/04 ,  H03C1/06 ,  H03F3/45076 ,  H03F2203/45116 ,  H03K5/02 ,  H03K5/24

摘要： An analog signal conditioning device and method employing a multi-path feedback mechanism to actively minimize the error of the overall desired signal conditioning transfer function to produce a corrected output signal, initially and over temperature, by exploiting characteristics of resistances manufactured simultaneously on a common thermally conductive substrate.

公开(公告)号：US09654054B1

公开(公告)日：2017-05-16

申请号：US14872107

申请日：2015-09-30

申请人： Technology for Energy Corp.

发明人： Kevin Christopher Omoumi ,  Allen Vaughn Blalock

IPC分类号： H03L5/00 ,  H03C1/06

CPC分类号： G01R21/06 ,  G01R22/08 ,  G01R35/04 ,  H03C1/06 ,  H03F3/45076 ,  H03F2203/45116 ,  H03K5/02 ,  H03K5/24

摘要： The present general inventive concept is directed to provide a saturation prevention method that utilizes transfer function modulation to continuously and precisely condition signals over more than four orders of magnitude from a signal source. To avoid signal conditioning error and large transient behavior due to range switching, continuous conditioning of all ranges without saturation over the entire large input dynamic range is employed. The use of transimpedance amplifiers in an example embodiment induces negligible loading on the signal source such that the integrity of the original signal is fully maintained, enabling precise signal conditioning. The ratio of gain to input impedance with a transimpedance amplifier is orders of magnitude larger than other typical methods of signal conditioning, making these amplifiers optimum for the saturation prevention method. An example embodiment utilizes the saturation prevention method to maintain the expected signal gain and a low impedance load for the signal source to ensure the desired accuracy of the signal conditioning.

公开(公告)号：US20150003566A1

公开(公告)日：2015-01-01

申请号：US13927696

申请日：2013-06-26

申请人： MOTOROLA SOLUTIONS, INC.

发明人： Rizwan Murji

IPC分类号： H04L27/04

CPC分类号： H03C5/00 ,  H03C1/06 ,  H03C3/08 ,  H03C2200/0041 ,  H03C2200/0058 ,  H03C2200/0083

摘要： A transmitter power supply modulates an RF signal without needing to run a calibration/training cycle every time an exciter or PA module is switched in and out or every time the transmitter powers up. During calibration of the exciter module, an exciter module delay factor is determined, and stored in the exciter module, for each signal modulation scheme that may be implemented by the exciter module. During calibration of a power amplifier (PA) module, a power supply modulation (PSM) delay factor is determined for, and stored in, the PA module. During transmitter operation, the exciter module generates RF and envelope signals based on an input signal. The PA module generates a power supply voltage based on the envelope signal and a final delay factor, which final delay factor is based on the exciter module and PSM delay factors. The PA module then modulates the RF signal using the power supply voltage.

摘要翻译： 发射机电源调制RF信号，无需每次激励器或PA模块进入或退出或每次发射机上电时，都会运行校准/训练周期。 在激励器模块的校准期间，对于可由激励器模块实现的每个信号调制方案，确定激励器模块延迟因子并存储在激励器模块中。 在校准功率放大器（PA）模块期间，为PA模块确定并存储在PA模块中的电源调制（PSM）延迟因子。 在发射机操作期间，激励器模块基于输入信号产生RF和包络信号。 PA模块基于包络信号和最终延迟因子产生电源电压，最终延迟因子基于激励器模块和PSM延迟因子。 PA模块然后使用电源电压调制RF信号。

公开(公告)号：US07893787B2

公开(公告)日：2011-02-22

申请号：US11996477

申请日：2005-08-19

申请人： Robert Walkington

发明人： Robert Walkington

IPC分类号： H03C1/06

CPC分类号： H03C1/06 ,  H03C1/52 ,  H04L25/063

摘要： A DC offset cancellation circuit used for compensating a carrier leak at an output signal of a modulator has a sign extraction unit for extracting sign of an information signal which is applied to the modulator, an envelope detecting unit for performing envelope detection on the output signal of the modulator to output the resulting envelope, a slope detecting unit for performing polarity detection on the slope of the envelope; and a signal processing unit for generating a DC offset cancellation signal for compensating the carrier leak based on the result of the sign extraction and the result of the polarity detection. The signal processing unit preferably calculates the DC offset cancellation signal by multiplying the sign of the information signal by the polarity of the slope of the envelope and accumulating the result of multiplication.

摘要翻译： 用于补偿调制器的输出信号的载波泄漏的DC偏移消除电路具有用于提取施加到调制器的信息信号的符号的符号提取单元，用于对信号信号执行包络检测的包络检测单元 用于输出所得到的包络的调制器，用于对信封的斜率执行极性检测的斜率检测单元; 以及信号处理单元，用于基于符号提取的结果和极性检测的结果产生用于补偿载波泄漏的DC偏移消除信号。 信号处理单元优选地通过将信息信号的符号乘以包络的斜率的极性并累积乘法结果来计算DC偏移消除信号。

公开(公告)号：US20100097102A1

公开(公告)日：2010-04-22

申请号：US12579097

申请日：2009-10-14

申请人： Shunichiro MASAKI

发明人： Shunichiro MASAKI

IPC分类号： H03D13/00

CPC分类号： H03C1/06 ,  G01R31/31727 ,  G06F1/08 ,  H03K3/84

摘要： A semiconductor integrated circuit includes a clock generator for generating a second clock signal having a frequency that varies over time by using a first clock signal having a fixed frequency, a test circuit for generating a digital signal according to a difference between a first frequency corresponding to the first clock signal and a second frequency corresponding to the second clock signal by a digital logic operation based on the first clock signal and the second clock signal, and a signal path for outputting the digital signal generated by the test circuit.

摘要翻译： 半导体集成电路包括：时钟发生器，用于产生具有通过使用具有固定频率的第一时钟信号随时间变化的频率的第二时钟信号;一个测试电路，用于根据与第 通过基于第一时钟信号和第二时钟信号的数字逻辑运算与第二时钟信号相对应的第一时钟信号和第二频率，以及用于输出由测试电路产生的数字信号的信号路径。

公开(公告)号：US20050032488A1

公开(公告)日：2005-02-10

申请号：US10889567

申请日：2004-07-12

申请人： David Pehlke ,  Aristotele Hadjichristos

发明人： David Pehlke ,  Aristotele Hadjichristos

IPC分类号： H03F3/24 ,  H04B1/04 ,  H04K1/02 ,  H04L25/03 ,  H04L25/49

CPC分类号： H03C1/06 ,  H03C5/00 ,  H03F1/02 ,  H03F1/0222 ,  H03F1/0261 ,  H03F1/32 ,  H03F3/24 ,  H03F2200/324 ,  H03F2200/456 ,  H03F2200/504 ,  H04B1/04 ,  H04B1/0483 ,  H04B2001/045 ,  H04B2001/0491

摘要： An amplifier circuit includes a power amplifier biased for saturated mode operation, and a controllable current source to provide supply current to the power amplifier. The controllable current source effects desired amplitude modulation of the output signal from the power amplifier by modulating the supply current it provides responsive to an amplitude information signal. In one or more embodiments, the current source includes a circuit that is configured to adjust one or more transmitter operating parameters responsive to detecting changes in the effective DC resistance of the power amplifier. For example, the circuit may generate a compensation signal that reduces the effective DC resistance responsive to detecting that the effective DC resistance has undesirably increased. By way of non-limiting examples, such compensation may be effected by changing a current mirror, an amplifier-to-antenna impedance matching, an amplifier bias or device size, or imposing some form of transmit signal back-off.

摘要翻译： 放大器电路包括偏置用于饱和模式操作的功率放大器和可控电流源，以向功率放大器提供电源电流。 可控电流源通过调制其响应于幅度信息信号提供的电源电流来影响来自功率放大器的输出信号的期望幅度调制。 在一个或多个实施例中，电流源包括被配置为响应于检测功率放大器的有效直流电阻的变化来调整一个或多个发射器操作参数的电路。 例如，电路可以响应于检测到有效DC电阻不期望地增加而产生降低有效DC电阻的补偿信号。 作为非限制性示例，可以通过改变电流镜，放大器到天线阻抗匹配，放大器偏置或器件尺寸或者施加某种形式的发射信号反馈来实现这种补偿。

公开(公告)号：US06414560B2

公开(公告)日：2002-07-02

申请号：US09796634

申请日：2001-02-28

申请人： Cary L. Delano

发明人： Cary L. Delano

IPC分类号： H03C106

CPC分类号： H03C1/06 ,  H03C3/08 ,  H03F3/2171

摘要： A modulator loop is described having an associated band pass frequency range and including a switching stage having a first delay associated therewith. The modulator loop also includes a modulator stage having a feedback input. The output of the modulator stage is coupled to the input of the switching stage. A first feedback path is coupled between the output of the switching stage and the modulator stage. A notch filter corresponding to the band pass frequency range is coupled between the output of the modulator stage and the feedback input of the modulator stage for compensating for the first delay.

摘要翻译： 描述了具有相关带通频率范围并包括具有与其相关联的第一延迟的开关级的调制器环路。 调制器环路还包括具有反馈输入的调制器级。 调制器级的输出端耦合到开关级的输入端。 第一反馈路径耦合在开关级的输出和调制器级之间。 对应于带通频率范围的陷波滤波器耦合在调制器级的输出端和调制器级的反馈输入端之间，用于补偿第一延迟。

公开(公告)号：US5966645A

公开(公告)日：1999-10-12

申请号：US868008

申请日：1997-06-03

申请人： Michael D. Davis

发明人： Michael D. Davis

IPC分类号： H03C1/06 ,  H04B1/04 ,  H03C1/52

CPC分类号： H03C1/06 ,  H04B1/04

摘要： An AM radio transmitter utilizes a push-pull MOSFET based design that rejects even-ordered harmonics, and therefore produces minimal electromagnetic radiation. The transmitter contains a low level modulating circuit and a feedback modulation arrangement which linearizes the modulation of the transmitter, and also senses reverse power in the transmitter antenna line, so that the power and modulation can be reduced if the transmitter has a less than optimal load condition existing on an antenna port. A unique modulation amplifier utilizes a Darlington RF pair having an input stage including the collector of the first transistor of the pair, and a pin diode connected to the base of the first transistor of the pair. A radio signal is modulated by varying a voltage on the collector of the input stage, and simultaneously maintaining a constant voltage at an output stage of the Darlington RF transistor pair. Additionally, a bias of the pin diode is simultaneously varied by the audio signal, thereby changing attenuation characteristics of the radio signal.

摘要翻译： AM无线电发射机采用基于推挽MOSFET的设计，可以抑制偶次谐波，从而产生最小的电磁辐射。 发射机包含低电平调制电路和反馈调制装置，其对发射机的调制进行线性化，并且还感测发射机天线线路中的反向功率，使得如果发射机具有小于最佳负载的功率和调制，则可以减小功率和调制 条件存在于天线端口上。 唯一的调制放大器利用达林顿RF对，其具有包括该对的第一晶体管的集电极的输入级和连接到该对的第一晶体管的基极的引脚二极管。 无线电信号通过改变输入级的集电极上的电压并在达林顿RF晶体管对的输出级同时维持恒定电压来调制。 此外，pin二极管的偏置由音频信号同时变化，从而改变无线电信号的衰减特性。

公开(公告)号：US5304943A

公开(公告)日：1994-04-19

申请号：US977044

申请日：1992-11-16

申请人： Floyd A. Koontz

发明人： Floyd A. Koontz

IPC分类号： H03C1/02 ,  H03C1/06 ,  H03F1/02 ,  H03F1/56 ,  H03F3/60 ,  H03F3/68

CPC分类号： H03F1/0277 ,  H03F1/565 ,  H03F3/602 ,  H03C1/02 ,  H03C1/06

摘要： A system and method for combining RF signals by a series of in-phase combiners. The system uses a series of switched, high efficiency amplifiers which may be selectively operated to obtain a desired output signal, such as an Amplitude Modulated (AM) signal. The output signals of the amplifiers are combined by a series of in-phase combiners. In a high linearity system a feedback loop is used to correct for combiner losses. The RF power normally lost in the combiners is recovered and available to increase the overall combiner efficiency.

摘要翻译： 一种用于通过一系列同相组合器组合RF信号的系统和方法。 该系统使用一系列开关式高效率放大器，其可以选择性地操作以获得期望的输出信号，例如幅度调制（AM）信号。 放大器的输出信号由一系列同相组合器组合。 在高线性系统中，使用反馈回路来纠正组合器损耗。 在组合器中正常丢失的RF功率被恢复并且可用于增加总体组合器效率。