-
公开(公告)号：US07082290B2
公开(公告)日：2006-07-25
申请号：US10372981
申请日：2003-02-26
IPC分类号： H04B1/02
CPC分类号： H03G3/3047 , H04L27/368
摘要： A polar-loop wireless communication apparatus includes, on a forward path between an amplitude detector and a power amplifier which constitute an amplitude control loop, a variable gain amplifier and a switch to change characteristics of a loop filter to output a frequency bandwidth of the amplitude control loop to an order less than an order for normal operation. The system is operated with the characteristics set to the lower order to measure outputs from the power amplifier to calibrate the output power of the power transmitter, and the register is operated with the characteristics set to the higher order to measure the open loop gain of the amplitude control. According to results of the calculation, data to correct gain characteristics of the variable gain amplifier with respect to an output control signal is stored in a nonvolatile memory of a baseband circuit.
-
2.发明申请Communication semiconductor integrated circuit, a wireless communication apparatus, and a loop gain calibration method 审中-公开通信半导体集成电路，无线通信装置和环路增益校准方法公开(公告)号：US20060189285A1
公开(公告)日：2006-08-24
申请号：US11407977
申请日：2006-04-21
CPC分类号： H03G3/3047 , H04L27/368
摘要： A polar-loop wireless communication apparatus includes, on a forward path between an amplitude detector and a power amplifier which constitute an amplitude control loop, a variable gain amplifier and a switch to change characteristics of a loop filter to output a frequency bandwidth of the amplitude control loop to an order less than an order for normal operation. The system is operated with the characteristics set to the lower order to measure outputs from the power amplifier to calibrate the output power of the power transmitter, and the register is operated with the characteristics set to the higher order to measure the open loop gain of the amplitude control. According to results of the calculation, data to correct gain characteristics of the variable gain amplifier with respect to an output control signal is stored in a nonvolatile memory of a baseband circuit.
摘要翻译： 极地回路无线通信装置在振幅检测器和构成振幅控制环路的功率放大器之间的前向路径上包括可变增益放大器和开关，以改变环路滤波器的特性，以输出振幅的频率带宽 控制循环到小于正常操作的顺序的顺序。 该系统的运行特性设置为较低阶，以测量功率放大器的输出，以校准功率发射器的输出功率，并且寄存器的运行特性设置为较高阶，以测量开环增益的开环增益 幅度控制。 根据计算结果，将可变增益放大器相对于输出控制信号的增益特性校正的数据存储在基带电路的非易失性存储器中。
-
3.发明授权Wireless communication system and communication semiconductor integrated circuit device 有权无线通信系统和通信半导体集成电路器件公开(公告)号：US07356092B2
公开(公告)日：2008-04-08
申请号：US10808318
申请日：2004-03-25
申请人： Ryoichi Takano , Kazuhiko Hikasa , Kenji Toyota , Kazuhisa Okada
发明人： Ryoichi Takano , Kazuhiko Hikasa , Kenji Toyota , Kazuhisa Okada
IPC分类号： H04L27/36
CPC分类号： H03J7/02 , H03G3/3047 , H04B1/0483 , H04B2001/0416
摘要： When a transmitting oscillator is built in a communication semiconductor integrated circuit device like a high-frequency IC constituting a wireless communication system, the system prevents degradation of the accuracy of control on the output power of a power amplifier due to noise jumped from an output pin of the transmitting oscillator to an input pin for a detected signal (feedback signal) of an output level of the power amplifier. The transmitting oscillator is built in the high-frequency IC. The detected signal of the output level of the power amplifier, which is detected by a coupler, is attenuated to a level slightly higher than the level of noise jumped from the output pin of the transmitting oscillator to the input pin for a feedback signal of an amplitude control loop, which in turn is inputted to the feedback signal input pin of the high-frequency IC.
摘要翻译： 当发送振荡器构建在诸如构成无线通信系统的高频IC的通信半导体集成电路装置中时，该系统防止由于从输出引脚跳出的噪声对功率放大器的输出功率的控制精度的降低 发送振荡器到功率放大器的输出电平的检测信号（反馈信号）的输入引脚。 发射振荡器内置在高频IC中。 由耦合器检测到的功率放大器的输出电平的检测信号被衰减到略高于从发送振荡器的输出引脚跳到输入引脚的噪声电平的电平，用于反馈信号 幅度控制环路，进而输入到高频IC的反馈信号输入引脚。
-
4.发明申请Semiconductor integrated circuit for communication and portable communication terminal 审中-公开用于通信和便携式通信终端的半导体集成电路公开(公告)号：US20060234661A1
公开(公告)日：2006-10-19
申请号：US11404818
申请日：2006-04-17
申请人： Kenji Toyota , Ryoichi Takano , Noriyuki Kurakami
发明人： Kenji Toyota , Ryoichi Takano , Noriyuki Kurakami
CPC分类号： H03G1/04
摘要： The present invention provides a semiconductor integrated circuit for communication (radio frequency IC) capable of detecting and correcting variations in an amplitude loop band of a transmission circuit having a phase control loop and an amplitude control loop without using an external measuring apparatus. In a semiconductor integrated circuit for communication (radio frequency IC) including a transmission circuit having a phase control loop for controlling the phase of a carrier wave and an amplitude control loop for controlling the amplitude of a transmission output signal, a calibration circuit for detecting variations in a loop gain of the amplitude control loop and correcting the loop band is provided. The calibration circuit detects variations in a loop gain by comparing a feedback signal with an output signal of a modulation circuit while changing electric parameters of any of circuits on the amplitude control loop step by step, and corrects the loop band by changing characteristics of any of the circuits on the amplitude control loop in accordance with the detected variations.
摘要翻译： 本发明提供一种用于通信（射频IC）的半导体集成电路，其能够检测和校正具有相位控制环路和幅度控制环路的发送电路的振幅环带的变化，而不使用外部测量装置。 在包括具有用于控制载波相位的相位控制环路的发送电路和用于控制发送输出信号的振幅的幅度控制环路的通信用半导体集成电路（射频IC）中， 提供了幅度控制环路的环路增益和校正环路带。 校准电路通过将调节电路的输出信号与反馈信号与调制电路的输出信号进行比较，同时逐步改变振幅控制环路中的任何电路的电参数，来检测环路增益的变化，并通过改变环路频带的任何特性 根据检测到的变化，振幅控制回路上的电路。
-
公开(公告)号：US20050233714A1
公开(公告)日：2005-10-20
申请号：US11149546
申请日：2005-06-10
CPC分类号： H03G3/3042 , H03G1/0052
摘要： A variable gain amplifier of low amplitude distortion, and low noise, having a large variable range, is provided. A variable gain differential amplifier that controls a gain by use of bias current is used as each of unit amplifiers (VGAs) making up the variable gain amplifier. A large variable gain range is obtained by series-connecting a plurality of the variable gain differential amplifiers. An attenuator is installed on the input side of the unit amplifier (VGA) at least in the initial stage. By doing so, it becomes possible to prevent amplitude distortion from occurring to the respective VGAs. An attenuator utilizing voltage division by capacitors, generating no noise, is used for lowering noise. Further, the variable gain amplifier is provided with a fixed gain amplifier installed in the final stage as necessary in order to obtain a total gain as desired. With the use of the variable gain amplifier as a variable gain amplifier for output power control of a polar loop transmitter, an excellent function for output power control can be achieved without causing significant deterioration in distortion characteristic and noise characteristic thereof.
-
公开(公告)号：US07463091B2
公开(公告)日：2008-12-09
申请号：US11902968
申请日：2007-09-27
申请人： Kenji Toyota , Kazuaki Hori , Kazuhiko Hikasa
发明人： Kenji Toyota , Kazuaki Hori , Kazuhiko Hikasa
IPC分类号： H03G3/20
CPC分类号： H03F1/0261 , H03F3/245 , H03F3/45085 , H03G1/00 , H03G1/0023 , H03G3/3042 , H03G2201/40
摘要： The present invention provides a communication semiconductor integrated circuit device equipped with a high-frequency power amplifier circuit including a gain control amplifier and a bias circuit which supplies such a bias current as to linearly change the gain of the gain control amplifier, and a wireless communication system using the same. A bias current generating circuit which supplies a bias current to a linear amplifier that constitutes the communication high-frequency power amplifier circuit, comprises a plurality of variable current sources respectively different in current value and start level. These variable current sources are controlled according to an input control voltage and thereby combine their currents into a bias current. The combined bias current changes exponentially with respect to the input control voltage.
-
7.发明授权Communication semiconductor integrated circuit device and wireless communication system 失效通信半导体集成电路器件和无线通信系统公开(公告)号：US06750719B2
公开(公告)日：2004-06-15
申请号：US10323819
申请日：2002-12-20
申请人： Kenji Toyota , Kazuaki Hori , Kazuhiko Hikasa
发明人： Kenji Toyota , Kazuaki Hori , Kazuhiko Hikasa
IPC分类号： H03G310
CPC分类号： H03F1/0261 , H03F3/245 , H03F3/45085 , H03G1/00 , H03G1/0023 , H03G3/3042 , H03G2201/40
摘要： The present invention provides a communication semiconductor integrated circuit device equipped with a high-frequency power amplifier circuit including a gain control amplifier and a bias circuit which supplies such a bias current as to linearly change the gain of the gain control amplifier, and a wireless communication system using the same. A bias current generating circuit which supplies a bias current to a linear amplifier that constitutes the communication high-frequency power amplifier circuit, comprises a plurality of variable current sources respectively different in current value and start level. These variable current sources are controlled according to an input control voltage and thereby combine their currents into a bias current. The combined bias current changes exponentially with respect to the input control voltage.
摘要翻译： 本发明提供了一种配备有包括增益控制放大器和偏置电路的高频功率放大器电路的通信半导体集成电路装置，该偏置电路提供这样的偏置电流以线性地改变增益控制放大器的增益，以及无线通信 系统使用相同。 向构成通信高频功率放大器电路的线性放大器提供偏置电流的偏置电流产生电路包括分别与电流值和起始电平不同的多个可变电流源。 这些可变电流源根据输入控制电压进行控制，从而将它们的电流组合成偏置电流。 组合的偏置电流相对于输入控制电压呈指数变化。
-
8.发明授权Communication semiconductor integrated circuit device and wireless communication system 有权通信半导体集成电路器件和无线通信系统公开(公告)号：US07288986B2
公开(公告)日：2007-10-30
申请号：US10836197
申请日：2004-05-03
申请人： Kenji Toyota , Kazuaki Hori , Kazuhiko Hikasa
发明人： Kenji Toyota , Kazuaki Hori , Kazuhiko Hikasa
IPC分类号： H03G3/20
CPC分类号： H03F1/0261 , H03F3/245 , H03F3/45085 , H03G1/00 , H03G1/0023 , H03G3/3042 , H03G2201/40
摘要： The present invention provides a communication semiconductor integrated circuit device equipped with a high-frequency power amplifier circuit including a gain control amplifier and a bias circuit which supplies such a bias current as to linearly change the gain of the gain control amplifier, and a wireless communication system using the same. A bias current generating circuit which supplies a bias current to a linear amplifier that constitutes the communication high-frequency power amplifier circuit, comprises a plurality of variable current sources respectively different in current value and start level. These variable current sources are controlled according to an input control voltage and thereby combine their currents into a bias current. The combined bias current changes exponentially with respect to the input control voltage.
摘要翻译： 本发明提供了一种配备有包括增益控制放大器和偏置电路的高频功率放大器电路的通信半导体集成电路装置，该偏置电路提供这样的偏置电流以线性地改变增益控制放大器的增益，以及无线通信 系统使用相同。 向构成通信高频功率放大器电路的线性放大器提供偏置电流的偏置电流产生电路包括分别与电流值和起始电平不同的多个可变电流源。 这些可变电流源根据输入控制电压进行控制，从而将它们的电流组合成偏置电流。 组合的偏置电流相对于输入控制电压呈指数变化。
-
公开(公告)号：US5963064A
公开(公告)日：1999-10-05
申请号：US8424
申请日：1998-01-16
申请人： Kenji Toyota , Tatsuji Matsuura , Kenichi Hase
发明人： Kenji Toyota , Tatsuji Matsuura , Kenichi Hase
CPC分类号： G05F1/561 , H03F1/3211 , H03F3/45179
摘要： A differential circuit having a relatively simple structure capable of delivering a linear transfer characteristic and expanding an input dynamic range. An increase in magnitude of differential input voltage V.sub.in applied to each gate of differential-pair MOSFETs M1 and M2 in the differential circuit decreases control voltage V.sub.CONT in a control circuit. On the other hand, since a current fed to MOSFETs M3 and M4 in the differential circuit decreases simultaneously, a current supplied to the differential-pair MOSFETs M1 and M2 in the differential circuit increases. Thus, the present invention makes it possible to effectively expand the input dynamic range with respect to differential input voltage V.sub.in.
摘要翻译： 一种具有相对简单结构的差分电路，能够传递线性传递特性并扩大输入动态范围。 施加到差分电路中的差分对MOSFET M1和M2的每个栅极的差分输入电压Vin的幅度的增加降低了控制电路中的控制电压VCONT。 另一方面，由于馈入差分电路中的MOSFET M3和M4的电流同时减小，所以提供给差分电路中的差分对MOSFET M1和M2的电流增加。 因此，本发明使得可以相对于差分输入电压Vin有效地扩展输入动态范围。
-
公开(公告)号：US08160178B2
公开(公告)日：2012-04-17
申请号：US12396580
申请日：2009-03-03
申请人： Kenji Toyota , Kazuhiko Hikasa
发明人： Kenji Toyota , Kazuhiko Hikasa
IPC分类号： H04L27/20
CPC分类号： H04B1/0475 , H03D7/1433 , H03D7/145 , H03D7/1458 , H03D2200/0043 , H03D2200/009 , H04B2001/0491 , H04L27/0014 , H04L27/34 , H04L27/362 , H04L2027/0018
摘要： A transmitter has a transmission modulator including first and second modulators, a phase comparator and a controller. First and second non-inverted local signals supplied to the modulators are set to have a predetermined phase difference. In a calibration action for reducing carrier leakage, the phase comparator is supplied with the first or second local signals, and carrier signals leaking at an output of the transmission modulator. The controller keeps changing the ratio of DC biasing currents to paired transistors of each modulator until the predetermined phase difference is detected with the phase comparator. When the predetermined phase difference is detected, the controller stops changing the ratio of DC biasing currents. The chip footprint of a transmitter on the direct up-conversion (DUC) architecture is reduced, and carrier leakage owing to local signals supplied to the transmission modulator are decreased.
摘要翻译： 发射机具有包括第一和第二调制器的传输调制器，相位比较器和控制器。 提供给调制器的第一和第二非反相本地信号被设置为具有预定的相位差。 在用于减少载波泄漏的校准动作中，相位比较器被提供有第一或第二本地信号，并且载波信号在传输调制器的输出处泄漏。 控制器不断改变直流偏置电流与每个调制器的成对晶体管的比例，直到相位比较器检测到预定的相位差。 当检测到预定的相位差时，控制器停止改变直流偏置电流的比率。 直接上变频（DUC）架构上的发射机的芯片尺寸减小，并且由于提供给传输调制器的本地信号导致的载波泄漏减少。
-
-
-
-
-
-
-
-
-
搜索结果
14 条记录 (耗时 0.025 秒)
