公开(公告)号：US06774719B1

公开(公告)日：2004-08-10

申请号：US10661603

申请日：2003-09-15

Applicant: David Neal Wessel ,  John Ilowski ,  Morris Repeta

Inventor： David Neal Wessel ,  John Ilowski ,  Morris Repeta

IPC: H03G320

CPC classification number: H03F1/0222 ,  H03F1/3247

Abstract: A variable capacitance and control system used in a compensative manner to improve efficiency in power amplifier arrangements arranged to receive a power input which is voltage-modulated responsive to at least one control signal representative of the data signal. Also included are methods and software for controlling said power amplifier arrangements including the variable capacitance and control system. The data input to the power amplifier is pre-distorted and the resulting power amplification is substantially linear. The arrangement may be used in wireless base station transmitters, for example. Improved data transmission services are also provided which make use of such power amplifiers.

Abstract translation: 以补偿方式使用的可变电容和控制系统，以提高功率放大器装置的效率，该功率放大器装置布置成接收响应于表示数据信号的至少一个控制信号进行电压调制的功率输入。 还包括用于控制包括可变电容和控制系统的所述功率放大器装置的方法和软件。 输入到功率放大器的数据是预失真的，并且所得功率放大基本上是线性的。 例如，该布置可以用于无线基站发射机。 还提供了改进的数据传输服务，其利用这种功率放大器。

公开(公告)号：US06760454B1

公开(公告)日：2004-07-06

申请号：US09632444

申请日：2000-08-04

Applicant: Gregory A. Shreve ,  Robert B. Stokes ,  Marshall Y. Huang ,  Barry R. Allen

Inventor： Gregory A. Shreve ,  Robert B. Stokes ,  Marshall Y. Huang ,  Barry R. Allen

IPC: H03G320

CPC classification number: H04R1/083

Abstract: A voice-activated microphone and transceiver system includes an interrogator unit for transmitting a signal, receiving a modulated signal, and demodulating the modulated signal such that the difference between the transmitted signal and the modulated signal correspond to a unique sound wave signal. An acoustically driven microphone unit is also included for receiving the signal from the interrogator unit, modulating the signal with the sound wave signal, wherein the sound wave signal contains instructions for controlling an electronic device, and transmitting the modulated signal back to the interrogator unit for analysis by a signal processor.

Abstract translation: 语音激活麦克风和收发机系统包括用于发送信号，接收调制信号和解调调制信号的询问器单元，使得发送信号和调制信号之间的差异对应于独特的声波信号。 声学驱动的麦克风单元还包括用于接收来自询问器单元的信号，用声波信号调制信号，其中声波信号包含用于控制电子设备的指令，并将调制信号发送回询问器单元 由信号处理器进行分析。

公开(公告)号：US06744313B2

公开(公告)日：2004-06-01

申请号：US10138973

申请日：2002-05-02

Applicant: Pierre Andre Genest

Inventor： Pierre Andre Genest

IPC: H03G320

CPC classification number: H03G3/3047

Abstract: A power amplifier driver (16) provides control voltage inputs to power amplifier (14) at terminal (OUT). An output power control loop is implemented through directional coupler (20) and power amplifier driver (16). Power amplifier driver (16) implements a loop integration function utilizing transconductance amplifiers (60, 62) to convert a detection signal (DET) and a reference signal (REF2) to current for summing at node 58. Transconductance amplifiers (70,72) convert the error voltage generated at node (34) and bias voltage (Vmin) to current for summing at node (36) for subsequent conversion back to voltage by resistor (74). The error voltage at node (36) is buffered (26) to provide adequate current drive at terminal (OUT).

Abstract translation: 功率放大器驱动器（16）在端子（OUT）处向功率放大器（14）提供控制电压输入。 通过定向耦合器（20）和功率放大器驱动器（16）实现输出功率控制环路。 功率放大器驱动器（16）使用跨导放大器（60,62）来实现循环积分功能，以将检测信号（DET）和参考信号（REF2）转换为电流以在节点58求和。跨导放大器（70,72）转换 在节点（34）处产生的误差电压和偏置电压（Vmin）到用于在节点（36）处相加的电流，以便随后通过电阻器（74）转换回电压。 节点（36）处的误差电压被缓冲（26），以在端子（OUT）提供足够的电流驱动。

公开(公告)号：US06696893B2

公开(公告)日：2004-02-24

申请号：US10319599

申请日：2002-12-16

Applicant: Lawrence M. Burns ,  Leonard Dauphinee

Inventor： Lawrence M. Burns ,  Leonard Dauphinee

IPC: H03G320

CPC classification number: H03G3/3068 ,  G05F3/242 ,  H03F3/211 ,  H03F3/72 ,  H03F2203/21191 ,  H03F2203/7227 ,  H03G3/001 ,  H03G3/3042

Abstract: An extended range variable gain amplifier is described. The variable gain capability is achieved by replacing differential pair amplifiers having an input signal with less attenuation with one having an input signal that is more attenuated. This replacement continues until only ten differential pair amplifiers are remaining. At this point, if less gain is desired, differential pair amplifiers are turned off, but are not replaced. A minimum number of amplifiers will remain on.

Abstract translation: 描述了扩展范围可变增益放大器。 可变增益能力通过用具有更多衰减的输入信号替换具有较小衰减的输入信号的差分对放大器来实现。 该替换继续，直到仅剩下十个差分对放大器。 此时，如果需要较小的增益，则差分对放大器被关闭，但不被替换。 最少数量的放大器将保持开启状态。

公开(公告)号：US06621338B1

公开(公告)日：2003-09-16

申请号：US09742232

申请日：2000-12-22

Applicant: Andre J. Van Schyndel

Inventor： Andre J. Van Schyndel

IPC: H03G320

CPC classification number: H03K5/082

Abstract: A method and apparatus for setting the level of an analog signal supplied to an electronic device having a maximum input level. The method includes computing a gain which, when applied to the analog signal, causes the amplified signal to exceed the maximum input level for a percentage of time which is greater than zero, and applying the gain to the analog signal. When clipping occurs at least part of the time, the correlation result obtained for a pair of truly correlated signals remains virtually unaffected, while there is actually a beneficial effect on the correlation result obtained for a pair of truly uncorrelated signals. To determine the amplifier gain needed to attain the desired amount of clipping, the present invention capitalizes on the availability of power measurements taken from the signal before it was amplified. Reliance on feedback from the amplifier output is not required, resulting in a simplified gain computation process.

Abstract translation: 一种用于设置提供给具有最大输入电平的电子设备的模拟信号的电平的方法和装置。 该方法包括计算一个增益，该增益在应用于模拟信号时，使放大的信号超过大于零的时间百分比的最大输入电平，并将增益应用于模拟信号。 当至少部分时间发生削波时，对于一对真正相关信号获得的相关结果实际上不受影响，而对于一对真实不相关信号获得的相关结果实际上是有益的。 为了确定达到所需量的限幅所需的放大器增益，本发明利用了从信号放大之前获取的功率测量的可用性。 不需要依赖于放大器输出的反馈，从而实现简化的增益计算过程。

公开(公告)号：US06608524B2

公开(公告)日：2003-08-19

申请号：US10163456

申请日：2002-06-07

Applicant: Akira Kawabe ,  Kouji Okamoto

Inventor： Akira Kawabe ,  Kouji Okamoto

IPC: H03G320

CPC classification number: H03G3/3084

Abstract: In a state where a PLL circuit is not locked, a gain control signal according to the difference between a peak value of a reproduced signal and the upper or lower limit value of the dynamic range of an A/D converter is given to a variable gain amplifier. In a state where the PLL circuit is locked, a gain control signal according to the difference between the reproduced signal and a reference value that corresponds to a level to which the reproduced signal belongs is given to the variable gain amplifier for each sampling point of the A/D converter. The variable gain amplifier amplifies the reproduced signal with a gain according to the gain control signal.

公开(公告)号：US06498534B1

公开(公告)日：2002-12-24

申请号：US09882497

申请日：2001-06-15

Applicant: Chun-Sup Kim ,  Sang-Soo Lee

Inventor： Chun-Sup Kim ,  Sang-Soo Lee

IPC: H03G320

CPC classification number: H03F1/025 ,  H03F1/0277 ,  H03G3/3026

Abstract: A variable-gain amplifier circuit includes an input port, an output port, and first and second amplifiers coupled therebetween. The first amplifier includes a first amplifier path having a first amplification factor, effective when the input signal has a voltage level in a first range, and a second amplifier path having a second amplification factor greater than the first amplification factor, effective when the input signal has a voltage level in a second range including voltages of a first polarity greater than that in the first range. The second amplifier includes a third amplifier path having the first amplification factor, effective when the input signal has a voltage level in a third range, and a fourth amplifier path having the second amplification factor, effective when the input signal has a voltage level in a fourth range including voltages of a second polarity greater than that in the third range.

Abstract translation: 可变增益放大器电路包括输入端口，输出端口以及耦合在其间的第一和第二放大器。 第一放大器包括具有第一放大因子的第一放大器路径，当输入信号具有在第一范围内的电压电平时有效;以及第二放大器路径，具有大于第一放大因子的第二放大系数，当输入信号 具有包括第一极性大于第一范围的电压的第二范围内的电压电平。 第二放大器包括具有第一放大因子的第三放大器路径，当输入信号具有第三范围内的电压电平时有效;以及第四放大器路径，具有第二放大因子，当输入信号具有第 第四范围包括大于第三范围的第二极性的电压。

公开(公告)号：US06496063B2

公开(公告)日：2002-12-17

申请号：US09997945

申请日：2001-11-29

Applicant: Carsten Hinrichsen ,  Lionel Pauc

Inventor： Carsten Hinrichsen ,  Lionel Pauc

IPC: H03G320

CPC classification number: H03G3/3042 ,  H03G3/3036

Abstract: A power amplifier controller (45) for a wireless communications device (10), such as a wireless telephone, is disclosed. The power amplifier controller (45) has includes controllable bias current sources (56, 58) coupled to Schottky diodes (60), which are coupled to power amplifiers (50) to sense their power output. The controllable bias current sources (56, 58) selectably apply one of multiple available bias currents (I1, I2) to their corresponding Schottky diodes (60F, 60R). Timing and control circuitry (62) in the power amplifier controller (45) receives a desired power level signal (DESPWR), and control switches (SW1, SW2) in the controllable bias current sources (56, 58) to apply a bias current (I1, I2) responsive to the level of power indicated by the desired power level signal (DESPWR). The power detected by Schottky diodes (60F, 60R) is applied to a summing adder (65), from which a control signal (VAPC) is derived and used to control the output of the power amplifiers (50). The controllable bias currents (I1, I2) permit the power output to be selectably sensed with high dynamic range or high sensitivity, depending upon the power level to be applied.

Abstract translation: 公开了一种用于诸如无线电话的无线通信设备（10）的功率放大器控制器（45）。 功率放大器控制器（45）包括耦合到肖特基二极管（60）的可控偏置电流源（56,58），其耦合到功率放大器（50）以感测其功率输出。 可控偏置电流源（56,58）可选地将多个可用偏置电流（I1，I2）中的一个施加到它们对应的肖特基二极管（60F，60R）上。 功率放大器控制器（45）中的定时和控制电路（62）在可控偏置电流源（56,58）中接收期望的功率电平信号（DESPWR）和控制开关（SW1，SW2），以施加偏置电流 I1，I2），其响应于由所需功率电平信号（DESPWR）指示的功率电平。 由肖特基二极管（60F，60R）检测的功率被施加到求和加法器（65），导出控制信号（VAPC）并用于控制功率放大器（50）的输出。 可控偏置电流（I1，I2）允许根据要施加的功率电平以高动态范围或高灵敏度可选择地感测功率输出。

公开(公告)号：US06477358B1

公开(公告)日：2002-11-05

申请号：US09355136

申请日：1999-11-04

Applicant: Thomas Mader ,  Gerhard Kottschlag ,  Gerhard Pitz

Inventor： Thomas Mader ,  Gerhard Kottschlag ,  Gerhard Pitz

IPC: H03G320

CPC classification number: H04W52/04 ,  H03G3/3047 ,  H04W52/52

Abstract: Method for controlling the power gain for outputting a transmitted signal from a radio device. At the beginning of the transmitted signal, the output power is increased to a preset power level along a preset characteristic curve. At the end of the transmitted signal, the preset power is decreased along the preset characteristic curve. The power gain is controlled accordingly by a control signal (8, 9). A reference control signal (5) is used for the rising and falling edges of the control signal (8, 9). The control signal (8, 9) is limited to a preset maximum control signal value (6, 7).

Abstract translation: 用于控制从无线电设备输出发送信号的功率增益的方法。 在发送信号的开始，输出功率沿着预设的特性曲线增加到预设的功率电平。 在发送信号结束时，预设功率沿着预设的特性曲线减小。 通过控制信号（8,9）相应地控制功率增益。 参考控制信号（5）用于控制信号（8,9）的上升沿和下降沿。 控制信号（8,9）被限制为预设的最大控制信号值（6,7）。

公开(公告)号：US06310518B1

公开(公告)日：2001-10-30

申请号：US09429002

申请日：1999-10-29

Applicant: Eric J. Swanson

Inventor： Eric J. Swanson

IPC: H03G320

CPC classification number: H03M1/765 ,  H03M1/185 ,  H03M1/187 ,  H03M1/208

Abstract: A programmable gain preamplifier is provided which has a low temperature drift and good dynamic range characteristics. The programmable gain preamplifier provides a programmable gain of the difference between two input signals (Ain and Ain′ for example). One of the input signals (Ain′) may be an estimation of the other input signal (Ain). The estimation input signal (or a signal related to the estimated input) may be generated by the use of a reference voltage and a first resistor string. More particularly, the reference voltage and the first resistor string may operate as a digital to analog converter (DAC) that converts a digital estimation signal to an analog estimation voltage. The analog estimation voltage operates as an analog voltage that is a function of (or the same as) the analog Ain′ estimation signal. The first resistor string may provide the estimation voltage without loading the resistor string. Thus, the first resistor string may be simultaneously utilized by other circuitry, such as for example, a downstream ADC. The programmable preamplifier gain may be set by the use of a second resistor string and digitally programmable switches. Contacts to the resistors strings may be placed outside of the current path of each resistor string to provide highly stable resistor strings having a very low temperature drift. In one preamplifier embodiment, some or all of the opamps may chopper stabilized opamps, at least one opamp may be a current feedback opamp, the resistor strings may be at least 64 resistors long and programmable gains from 1 to 32 may be provided.

Abstract translation: 提供了一种可编程增益前置放大器，具有低温度漂移和良好的动态范围特性。 可编程增益前置放大器提供两个输入信号（例如Ain和Ain'）之间差异的可编程增益。 输入信号（Ain'）中的一个可以是另一个输入信号（Ain）的估计。 可以通过使用参考电压和第一电阻串来产生估计输入信号（或与估计输入相关的信号）。 更具体地，参考电压和第一电阻器串可以作为将数字估计信号转换为模拟估计电压的数模转换器（DAC）来操作。 模拟估计电压作为模拟电压作为模拟电压估计信号的（或相同）的函数。 第一电阻器串可以提供估计电压而不加载电阻器串。 因此，第一电阻器串可以被其他电路同时使用，例如下游ADC。 可编程前置放大器增益可以通过使用第二电阻器串和数字可编程开关来设定。 与电阻器串的接触可以放置在每个电阻器串的电流路径之外，以提供具有非常低的温度漂移的高度稳定的电阻器串。 在一个前置放大器实施例中，一些或所有运算放大器可以斩波稳定的运算放大器，至少一个运算放大器可以是电流反馈运算放大器，电阻器串可以是至少64个电阻器长，并且可以提供从1到32的可编程增益。