-
公开(公告)号：US07424276B2
公开(公告)日：2008-09-09
申请号：US10509753
申请日：2003-02-18
IPC分类号： H04B1/04
CPC分类号： H03G3/3042 , H03F1/34 , H03F3/24 , H04B1/0475 , H04B2001/0433 , H04L27/361
摘要： In a transmitter of polar-loop architecture having a phase control loop and an amplitude control loop, as loop filters for controlling a loop band of the amplitude control loop, a first filter with lag-lead characteristics (secondary or more filter including a capacitor and a resistor) and a second filter of a perfect integrator type (filter including only a capacitor) are employed, and current-output type circuits are connected to respective front stages of the first and second filters.
摘要翻译： 在具有相位控制环路和幅度控制环路的极性环路架构的发射机中，作为用于控制振幅控制环路的环路频带的环路滤波器，具有滞后引线特性的第一滤波器（包括电容器和 电阻器）和完美积分器型（仅包括电容器的滤波器）的第二滤波器，并且电流输出型电路连接到第一和第二滤波器的各个前级。
-
公开(公告)号：US20050176388A1
公开(公告)日：2005-08-11
申请号：US10509753
申请日：2003-02-18
CPC分类号： H03G3/3042 , H03F1/34 , H03F3/24 , H04B1/0475 , H04B2001/0433 , H04L27/361
摘要： In a transmitter of polar-loop architecture having a phase control loop and an amplitude control loop, as loop filters for controlling a loop band of the amplitude control loop, a first filter with lag-lead characteristics (secondary or more filter including a capacitor and a resistor) and a second filter of a perfect integrator type (filter including only a capacitor) are employed, and current-output type circuits are connected to respective front stages of the first and second filters.
摘要翻译： 在具有相位控制环路和幅度控制环路的极性环路架构的发射机中，作为用于控制振幅控制环路的环路频带的环路滤波器，具有滞后引线特性的第一滤波器（包括电容器和 电阻器）和完美积分器型（仅包括电容器的滤波器）的第二滤波器，并且电流输出型电路连接到第一和第二滤波器的各个前级。
-
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：US06930549B2
公开(公告)日：2005-08-16
申请号：US10446859
申请日：2003-05-29
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.
摘要翻译： 提供了具有较大可变范围的低振幅失真和低噪声的可变增益放大器。 使用通过使用偏置电流来控制增益的可变增益差分放大器被用作构成可变增益放大器的单位放大器（VGA）中的每一个。 通过串联连接多个可变增益差分放大器来获得大的可变增益范围。 至少在初始阶段，衰减器安装在单元放大器（VGA）的输入侧。 通过这样做，可以防止对各个VGA产生振幅失真。 使用由电容器分压而不产生噪声的衰减器用于降低噪声。 此外，可变增益放大器设置有必要时安装在最后级的固定增益放大器，以便根据需要获得总增益。 通过使用可变增益放大器作为用于极性环路发送器的输出功率控制的可变增益放大器，可以实现输出功率控制的优异功能，而不会引起失真特性和噪声特性的显着劣化。
-
公开(公告)号：US20100085322A1
公开(公告)日：2010-04-08
申请号：US12573955
申请日：2009-10-06
申请人： Norio MAMBA , Koji Nagata , Koji Hayakawa , Kouichi Anno , Toshiyuki Kumagai , Tsutomu Furuhashi , Hisayoshi Kajiwara
发明人： Norio MAMBA , Koji Nagata , Koji Hayakawa , Kouichi Anno , Toshiyuki Kumagai , Tsutomu Furuhashi , Hisayoshi Kajiwara
CPC分类号： G06F3/0418 , G06F1/3262 , G06F3/0412 , G06F3/044
摘要： A capacitance detection device of a capacitance system includes: a capacitance sensor electrode for detecting a capacitance; a power source for supplying charges to be charged in the capacitance sensor electrode; an electric charge storage capacitor in which an amount of charges to be charged therein changes according to the electric charges charged in the capacitance sensor electrode; and a switch for changing a reference potential of the electric charge storage capacitor. The reference potential of the electric charge storage capacitor is changed in a period of measuring the capacitance.
摘要翻译： 电容系统的电容检测装置包括：用于检测电容的电容传感器电极; 用于提供要在电容传感器电极中充电的电荷的电源; 电荷存储电容器，其中要充电的电荷量根据在电容传感器电极中充电的电荷而改变; 以及用于改变电荷存储电容器的参考电位的开关。 电容存储电容器的参考电位在测量电容的时段内改变。
-
公开(公告)号：US20080054992A1
公开(公告)日：2008-03-06
申请号：US11830027
申请日：2007-07-30
申请人： Hisayoshi Kajiwara , Norio Mamba , Toshio Miyazawa
发明人： Hisayoshi Kajiwara , Norio Mamba , Toshio Miyazawa
IPC分类号： G05F1/10
CPC分类号： G09G3/3696 , G09G2330/021 , H02M2001/007
摘要： A booster circuit of a two-step booster structure is manufactured by NMOS single channel processes and has two basic booster circuits to raise a gate voltage of a charge transfer transistor. The gate voltage of the transistor is first raised at one basic booster circuit, and this raised voltage is further raised at the other basic booster circuit.
摘要翻译： 两级升压器结构的升压电路由NMOS单通道工艺制造，并具有两个基极升压电路，以提高电荷转移晶体管的栅极电压。 晶体管的栅极电压首先在一个基本升压电路上升高，另一个基本升压电路的升高电压进一步升高。
-
公开(公告)号：US20070091053A1
公开(公告)日：2007-04-26
申请号：US11545686
申请日：2006-10-11
IPC分类号： G09G3/36
CPC分类号： G09G3/3688 , G09G3/2003 , G09G3/3291 , G09G2310/027 , G09G2310/0297 , G09G2320/0276 , G09G2330/021 , H03M1/785
摘要： Output voltages of R-2R ladder resistor type digital-to-analog conversion circuits are once stored in sample and hold capacitors through sample and hold charging amplifiers and the voltages stored in the capacitors are then supplied to a liquid crystal panel through panel drive amplifiers and multiplexers simultaneously. Power supplies to the digital-to-analog conversion circuits and the charging amplifiers are turned on by means of switches only during the period that the voltages are written in the capacitors and turned off during other periods. Two systems of the capacitors and the panel drive amplifiers are provided in order to make the operation of charging the analog voltages to the capacitors and the operation of taking out the analog voltages stored in the capacitors to supply the voltages to the liquid crystal panel in parallel.
摘要翻译： R-2R梯形电阻器型数模转换电路的输出电压通过采样和保持充电放大器一次存储在采样和保持电容器中，然后通过面板驱动放大器将存储在电容器中的电压提供给液晶面板， 多路复用器同时。 数字到模拟转换电路和充电放大器的电源只有在电压写入电容器并在其他时间段关闭的时间内才通过开关导通。 提供电容器和面板驱动放大器的两个系统，以便对模拟电压充电到电容器的操作和取出存储在电容器中的模拟电压的操作以将电压并行地提供给液晶面板 。
-
公开(公告)号：US20070142012A1
公开(公告)日：2007-06-21
申请号：US11702493
申请日：2007-02-06
申请人： Yukinori Akamine , Hisayoshi Kajiwara , Satoshi Tanaka , Takashi Yano , Hirotake Ishii , Akio Yamamoto , Kazuaki Hori , Kazuhiko Hikasa
发明人： Yukinori Akamine , Hisayoshi Kajiwara , Satoshi Tanaka , Takashi Yano , Hirotake Ishii , Akio Yamamoto , Kazuaki Hori , Kazuhiko Hikasa
CPC分类号： H03G3/3078 , H03G3/3052 , H04B1/707
摘要： A wireless communication receiver that is able to lessen the effect of noise that accompanies gain change by programmable gain amplifiers. The receiver includes an AGC controller which controls the timing at which the programmable gain amplifiers make gain change, using a terminal counter and a sequencer. The receiver prevents gain change noise signals during the reception of control signals and other signals that are susceptible to noise. By the timing control feature, the programmable gain amplifiers make gain change while reducing noise impact.
摘要翻译： 一种无线通信接收机，能够通过可编程增益放大器减轻伴随增益变化的噪声影响。 接收机包括AGC控制器，其使用终端计数器和定序器来控制可编程增益放大器使增益改变的定时。 接收器在接收到易受噪声的控制信号和其它信号期间防止增益变化噪声信号。 通过定时控制功能，可编程增益放大器可实现增益改变，同时降低噪声影响。
-
公开(公告)号：US07194244B2
公开(公告)日：2007-03-20
申请号：US10253648
申请日：2002-09-25
申请人： Yukinori Akamine , Hisayoshi Kajiwara , Satoshi Tanaka , Takashi Yano , Hirotake Ishii , Akio Yamamoto , Kazuaki Hori , Kazuhiko Hikasa
发明人： Yukinori Akamine , Hisayoshi Kajiwara , Satoshi Tanaka , Takashi Yano , Hirotake Ishii , Akio Yamamoto , Kazuaki Hori , Kazuhiko Hikasa
IPC分类号： H04B1/06
CPC分类号： H03G3/3078 , H03G3/3052 , H04B1/707
摘要： A wireless communication receiver that is able to lessen the effect of noise that accompanies gain change by programmable gain amplifiers. The receiver includes an AGC controller which controls the timing at which the programmable gain amplifiers make gain change, using a terminal counter and a sequencer. The receiver prevents gain change noise signals during the reception of control signals and other signals that are susceptible to noise. By the timing control feature, the programmable gain amplifiers make gain change while reducing noise impact.
-
公开(公告)号：US09395850B2
公开(公告)日：2016-07-19
申请号：US12573955
申请日：2009-10-06
申请人： Norio Mamba , Koji Nagata , Koji Hayakawa , Kouichi Anno , Toshiyuki Kumagai , Tsutomu Furuhashi , Hisayoshi Kajiwara
发明人： Norio Mamba , Koji Nagata , Koji Hayakawa , Kouichi Anno , Toshiyuki Kumagai , Tsutomu Furuhashi , Hisayoshi Kajiwara
IPC分类号： G06F3/044
CPC分类号： G06F3/0418 , G06F1/3262 , G06F3/0412 , G06F3/044
摘要： A capacitance detection device of a capacitance system includes: a capacitance sensor electrode for detecting a capacitance; a power source for supplying charges to be charged in the capacitance sensor electrode; an electric charge storage capacitor in which an amount of charges to be charged therein changes according to the electric charges charged in the capacitance sensor electrode; and a switch for changing a reference potential of the electric charge storage capacitor. The reference potential of the electric charge storage capacitor is changed in a period of measuring the capacitance.
摘要翻译： 电容系统的电容检测装置包括：用于检测电容的电容传感器电极; 用于提供要在电容传感器电极中充电的电荷的电源; 电荷存储电容器，其中要充电的电荷量根据在电容传感器电极中充电的电荷而改变; 以及用于改变电荷存储电容器的参考电位的开关。 电容存储电容器的参考电位在测量电容的时段内改变。
-
-
-
-
-
-
-
-
-
搜索结果
12 条记录 (耗时 0.022 秒)
