公开(公告)号：US07501888B2

公开(公告)日：2009-03-10

申请号：US11710473

申请日：2007-02-26

Applicant: Leonard Dauphinee ,  Lawrence M. Burns

Inventor： Leonard Dauphinee ,  Lawrence M. Burns

IPC: H03G3/20

CPC classification number: H01L22/20 ,  G01R31/2607 ,  G01R31/30 ,  G01R31/31723 ,  H01L2924/0002 ,  H03F3/211 ,  H03G3/3036 ,  H03G3/3052 ,  H03G2201/307 ,  H04N5/4446 ,  H04N5/52 ,  H04N7/102 ,  H01L2924/00

Abstract: A Variable Gain Amplifier (VGA) amplifies an input signal according to a gain, to produce an amplified signal. A detector module detects a power indicative of a power of the amplified signal. A comparator module compares the detected power to a high threshold, a low threshold and a target threshold intermediate the high and low thresholds. A controller module changes the gain of the VGA so as to drive the detected power in a direction toward the middle threshold when the comparator module indicates the detected power is not between the high and low thresholds.

Abstract translation: 可变增益放大器（VGA）根据增益放大输入信号，以产生放大信号。 检测器模块检测指示放大信号的功率的功率。 比较器模块将检测到的功率与高阈值和低阈值中间的高阈值，低阈值和目标阈值进行比较。 当比较器模块指示检测到的功率不在高阈值和低阈值之间时，控制器模块改变VGA的增益以驱动检测到的功率朝向中间阈值的方向。

公开(公告)号：US20070159244A1

公开(公告)日：2007-07-12

申请号：US11710473

申请日：2007-02-26

Applicant: Leonard Dauphinee ,  Lawrence Burns

Inventor： Leonard Dauphinee ,  Lawrence Burns

IPC: H03G3/20

CPC classification number: H01L22/20 ,  G01R31/2607 ,  G01R31/30 ,  G01R31/31723 ,  H01L2924/0002 ,  H03F3/211 ,  H03G3/3036 ,  H03G3/3052 ,  H03G2201/307 ,  H04N5/4446 ,  H04N5/52 ,  H04N7/102 ,  H01L2924/00

Abstract: A Variable Gain Amplifier (VGA) amplifies an input signal according to a gain, to produce an amplified signal. A detector module detects a power indicative of a power of the amplified signal. A comparator module compares the detected power to a high threshold, a low threshold and a target threshold intermediate the high and low thresholds. A controller module changes the gain of the VGA so as to drive the detected power in a direction toward the middle threshold when the comparator module indicates the detected power is not between the high and low thresholds.

Abstract translation: 可变增益放大器（VGA）根据增益放大输入信号，以产生放大信号。 检测器模块检测指示放大信号的功率的功率。 比较器模块将检测到的功率与高阈值和低阈值中间的高阈值，低阈值和目标阈值进行比较。 当比较器模块指示检测到的功率不在高阈值和低阈值之间时，控制器模块改变VGA的增益以驱动检测到的功率朝向中间阈值的方向。

公开(公告)号：US07212795B2

公开(公告)日：2007-05-01

申请号：US10864193

申请日：2004-06-09

Applicant: Der-Zheng Liu ,  Song-Nien Tang ,  Tai-Cheng Liu ,  Kuang-Yu Yen

Inventor： Der-Zheng Liu ,  Song-Nien Tang ,  Tai-Cheng Liu ,  Kuang-Yu Yen

IPC: H04B1/06

CPC classification number: H03G3/3052 ,  H03G2201/206 ,  H03G2201/302 ,  H03G2201/305 ,  H03G2201/307 ,  H03G2201/502 ,  H03G2201/508 ,  H03M1/185 ,  H04B7/0814

Abstract: The invention provides an automatic gain control and antenna selection method used in a receiver of a radio communication system. The received signal power is estimated by digital signal processing after analog-to-digital conversion in the system, in order to adjust the gain of the front end analog signal until the magnitude of the analog signal is adjusted to an optimum range of the digital signal processing. In addition, the ADC is utilized to estimate the signal power as the basis of the antenna selection.

Abstract translation: 本发明提供一种在无线电通信系统的接收机中使用的自动增益控制和天线选择方法。 接收到的信号功率通过系统中模数转换后的数字信号处理来估计，以便调整前端模拟信号的增益，直到模拟信号的幅度被调整到数字信号的最佳范围 处理。 此外，ADC用于估计信号功率作为天线选择的基础。

公开(公告)号：US20060205372A1

公开(公告)日：2006-09-14

申请号：US10542466

申请日：2004-01-20

Applicant: Aaron Bouillet ,  Matthew Mayer

Inventor： Aaron Bouillet ,  Matthew Mayer

IPC: H04B7/00 ,  H04B1/06

CPC classification number: H03G3/3068 ,  H03G2201/103 ,  H03G2201/204 ,  H03G2201/305 ,  H03G2201/307

Abstract: A method and apparatus for generating the adaptive gain control signals in a communications receiver is disclosed. The present invention can be used with existing two stage gain architectures, and overcomes many undesirable characteristics of the previous mechanism. An apparatus is presented wherein each of a plurality of RF AGC gain controllable amplifiers are individually controlled by individual AGC control signals generated by an AGC controller so that the level of the output signal from each of the RF AGC gain controllable amplifiers is individually optimized for tuner performance.

Abstract translation: 公开了一种在通信接收机中产生自适应增益控制信号的方法和装置。 本发明可以与现有的两级增益架构一起使用，并且克服了先前机制的许多不期望的特征。 提出了一种装置，其中多个RF AGC增益可控放大器中的每一个由AGC控制器产生的各个AGC控制信号分别控制，使得来自每个RF AGC增益可控放大器的输出信号的电平被单独优化用于调谐器 性能。

公开(公告)号：US06982594B2

公开(公告)日：2006-01-03

申请号：US10712136

申请日：2003-11-13

Applicant: James R. Snider ,  Jason D. Millard

Inventor： James R. Snider ,  Jason D. Millard

IPC: H03G3/20

CPC classification number: H03G3/3047 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40

Abstract: A power control loop for a power amplifier is disclosed. Embodiments of the power control loop include deriving a secondary control signal. The secondary control signal may be used to control a gain applied to the power signal in the power control loop and to control a supply current or voltage delivered to a power amplifier.

Abstract translation: 公开了一种用于功率放大器的功率控制回路。 功率控制回路的实施例包括导出辅助控制信号。 辅助控制信号可以用于控制施加到功率控制回路中的功率信号的增益，并且控制传递到功率放大器的电源电流或电压。

公开(公告)号：US20050242875A1

公开(公告)日：2005-11-03

申请号：US11081384

申请日：2005-03-16

Applicant: Mark Gurvich ,  Ahmad Khanifar ,  Nikolai Maslennikov ,  Alexander Rabinovich

Inventor： Mark Gurvich ,  Ahmad Khanifar ,  Nikolai Maslennikov ,  Alexander Rabinovich

IPC: H03F1/02 ,  H03F1/32 ,  H03G3/20 ,  H03G3/30

CPC classification number: H03F1/32 ,  H03F1/0211 ,  H03F1/0222 ,  H03F1/0244 ,  H03G3/3042 ,  H03G2201/106 ,  H03G2201/206 ,  H03G2201/307

Abstract: A high efficiency radio frequency (RF) power amplifier having dynamically controlled back off is disclosed. The RF input voltage is sampled by an adaptive analog signal processing circuit. The adaptive analog signal processing circuit controls the supply voltage to RF amplifier devices, such as LDMOS devices, which varies the efficiency or back off of the power amplifier. The variable supply voltage in turn varies peak power of the amplifier.

Abstract translation: 公开了具有动态控制的退避的高效率射频（RF）功率放大器。 RF输入电压由自适应模拟信号处理电路采样。 自适应模拟信号处理电路控制对诸如LDMOS器件的RF放大器器件的电源电压，这些器件改变功率放大器的效率或退避。 可变电源电压又会改变放大器的峰值功率。

公开(公告)号：US20050206456A1

公开(公告)日：2005-09-22

申请号：US11130120

申请日：2005-05-17

Applicant: Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

Inventor： Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

IPC: H01L27/04 ,  H01L21/822 ,  H01L27/06 ,  H03F1/30 ,  H03F3/193 ,  H03F3/20 ,  H03F3/213 ,  H03F3/24 ,  H03F3/68 ,  H03G3/30 ,  H04B1/03 ,  H04B1/04

CPC classification number: H01L27/0629 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/49111 ,  H01L2224/49175 ,  H01L2924/13091 ,  H03F1/301 ,  H03F3/193 ,  H03F2200/294 ,  H03F2200/372 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40 ,  H01L2924/00014 ,  H01L2924/00

Abstract: The number of components of a high frequency power amplifier is reduced. A bias resistance ratio is adjusted in accordance with a change in the threshold voltage Vth of a transistor. A high frequency power amplifier has a plurality of amplifying systems. Each of these systems has an input terminal to which a signal to be amplified is supplied, an output terminal, a bias terminal, a plurality of amplifying stages which are sequentially cascaded between the input and output terminals, and a bias circuit connected to the bias terminal and each of the amplifying stages to apply a bias potential to the amplifying stage. The amplifying stage includes a control terminal for receiving an input signal and the bias potential supplied to the stage and a first terminal for transmitting an output signal of the stage.

Abstract translation: 高频功率放大器的组件数量减少。 根据晶体管的阈值电压Vth的变化来调整偏置电阻比。 高频功率放大器具有多个放大系统。 这些系统中的每一个都具有供给要被放大的信号的输入端子，输出端子，偏置端子，在输入和输出端子之间顺序级联的多个放大级，以及连接到偏置电路的偏置电路 端子和每个放大级以向放大级施加偏置电位。 放大级包括用于接收输入信号和提供给级的偏置电位的控制端子和用于发送级的输出信号的第一端子。

公开(公告)号：US20050206447A1

公开(公告)日：2005-09-22

申请号：US10803771

申请日：2004-03-18

Applicant: Ryo Yamazaki ,  William Noellert

Inventor： Ryo Yamazaki ,  William Noellert

IPC: H03G3/00 ,  H03G3/20 ,  H03G3/30

CPC classification number: H03F1/52 ,  H03G3/004 ,  H03G3/3047 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/208 ,  H03G2201/307 ,  H03G2201/708

Abstract: When a power amplifier control loop operates near or in saturation, the quality of the output signal can be degraded and an over current condition can occur. To prevent this, the output signal of the power amplifier is detected, converted to digital, and then converted into the frequency spectrum by means of a Fast Fourier Transform. The spectral characteristics of the output signal are analyzed to determine if the power amplifier control loop is approaching or operating in saturation mode. This determination is made by looking at the power of the output signal at various frequencies. If the output at these frequencies exceeds a threshold value, the power amplifier control loop is approaching saturation. In this situation, the output of the power amplifier can be adjusted to prevent loop saturation. This can be accomplished by reducing the supply voltage to the power amplifier or adjusting the bias voltage.

Abstract translation: 当功率放大器控制回路在接近或饱和状态下工作时，输出信号的质量可能会下降，可能会出现过电流状态。 为了防止这种情况，功率放大器的输出信号被检测，转换为数字，然后通过快速傅里叶变换转换成频谱。 分析输出信号的频谱特性，以确定功率放大器控制环路是否接近或在饱和模式下工作。 通过查看各种频率的输出信号的功率来进行该确定。 如果这些频率的输出超过阈值，则功率放大器控制回路接近饱和。 在这种情况下，可以调节功率放大器的输出，以防止环路饱和。 这可以通过降低功率放大器的电源电压或调整偏置电压来实现。

公开(公告)号：US06900694B2

公开(公告)日：2005-05-31

申请号：US10799673

申请日：2004-03-15

Applicant: Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

Inventor： Masashi Suzuki ,  Hitoshi Akamine ,  Tetsuaki Adachi ,  Takahiro Sato ,  Masashi Maruyama ,  Susumu Takada

IPC: H01L27/04 ,  H01L21/822 ,  H01L27/06 ,  H03F1/30 ,  H03F3/193 ,  H03F3/20 ,  H03F3/213 ,  H03F3/24 ,  H03F3/68 ,  H03G3/30 ,  H04B1/03 ,  H04B1/04 ,  H03G5/16

CPC classification number: H01L27/0629 ,  H01L2224/48091 ,  H01L2224/48227 ,  H01L2224/49111 ,  H01L2224/49175 ,  H03F1/301 ,  H03F3/193 ,  H03F2200/294 ,  H03F2200/372 ,  H03G3/3042 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307 ,  H03G2201/40 ,  H01L2924/00014

Abstract: The number of components of a high frequency power amplifier is reduced. A bias resistance ratio is adjusted in accordance with a change in the threshold voltage Vth of a transistor. A high frequency power amplifier has a plurality of amplifying systems. Each of these systems has an input terminal to which a signal to be amplified is supplied, an output terminal, a bias terminal, a plurality of amplifying stages which are sequentially cascaded between the input and output terminals, and a bias circuit connected to the bias terminal and each of the amplifying stages to apply a bias potential to the amplifying stage. The amplifying stage includes a control terminal for receiving an input signal and the bias potential supplied to the stage and a first terminal for transmitting an output signal of the stage.

公开(公告)号：US20050064841A1

公开(公告)日：2005-03-24

申请号：US10942844

申请日：2004-09-17

Applicant: Naoki Okamoto ,  Junji Ito

Inventor： Naoki Okamoto ,  Junji Ito

IPC: H03G1/00 ,  H03G3/20 ,  H03G3/30 ,  H03G11/08 ,  H04B1/28

CPC classification number: H03G1/0023 ,  H03G3/3063 ,  H03G11/08 ,  H03G2201/103 ,  H03G2201/206 ,  H03G2201/307

Abstract: In a receiving circuit, an antenna 11 receives a high-frequency signal at a predetermined frequency band, a level changing section 13 changes a signal level of the high-frequency signal received by the antenna, a subsequent-stage circuit 14 performs predetermined signal processing for the high-frequency signal whose signal level is changed at the level changing section 13, a detecting section 32 detects a signal level of the high-frequency signal for which the signal processing is performed by the subsequent-stage circuit 14, and a control section 33 sets a rate of change of the high-frequency signal by the level changing section 13, based on the signal level of the high-frequency signal detected by the detecting section 32, so that the signal level of the high-frequency signal detected by the detecting section 32 does not exceed a predetermined value.

Abstract translation: 在接收电路中，天线11接收预定频带的高频信号，电平变更部13改变由天线接收的高频信号的信号电平，后级电路14进行规定的信号处理 对于在电平变化部13发生信号电平变化的高频信号，检测部32检测后级电路14进行信号处理的高频信号的信号电平， 部分33基于由检测部分32检测的高频信号的信号电平，通过电平改变部分13设置高频信号的变化率，从而检测到高频信号的信号电平 由检测部32不超过规定值。