公开(公告)号：US06229399B1

公开(公告)日：2001-05-08

申请号：US09060145

申请日：1998-04-15

申请人： Daisuke Tobise ,  Hisashi Adachi ,  Hidenobu Kato

发明人： Daisuke Tobise ,  Hisashi Adachi ,  Hidenobu Kato

IPC分类号： H03L708

CPC分类号： H03L7/1976 ,  H03L7/093 ,  H03L7/099 ,  H03L7/18 ,  H03L2207/06

摘要： A multiband PLL frequency synthesizer is disclosed which includes: a reference signal generation circuit for generating a reference signal of which frequency is controlled; a phase comparator for generating a phase difference signal; a low-pass filter circuit for low-pass-filtering the phase difference signal with one of a plurality of cutoff frequencies selected; a VCO for generating and outputting a LO signal according to an output of the low-pass filter; a frequency dividing circuit having an integer frequency dividing mode and a fraction frequency dividing mode to supply the frequency-divided signal to the phase comparator; and a control circuit for supplying the reference frequency control signal to the reference signal generation circuit, a filter control signal to the low-pass filter circuit, and frequency dividing control signal (data) to the frequency dividing circuit in accordance with a frequency command signal. The cutoff frequencies and the frequency dividing mode are selected to control the loop condition in accordance with the frequency command signal.

摘要翻译： 公开了一种多频带PLL频率合成器，其包括：用于产生控制频率的参考信号的参考信号产生电路; 用于产生相位差信号的相位比较器; 低通滤波器电路，用于对选择的多个截止频率之一进行低通滤波所述相位差信号; 用于根据低通滤波器的输出产生和输出LO信号的VCO; 具有整数分频模式和分频分频模式的分频电路，用于将分频信号提供给相位比较器; 以及用于将参考频率控制信号提供给参考信号产生电路的控制电路，到低通滤波器电路的滤波器控制信号和根据频率指令信号的分频电路的分频控制信号（数据） 。 选择截止频率和分频模式以根据频率指令信号来控制环路状况。

公开(公告)号：US07973609B2

公开(公告)日：2011-07-05

申请号：US12536120

申请日：2009-08-05

申请人： Atsushi Ohara ,  Shinichiro Uemura ,  Hisashi Adachi

发明人： Atsushi Ohara ,  Shinichiro Uemura ,  Hisashi Adachi

IPC分类号： H03B27/00

CPC分类号： H03L7/18 ,  H03L7/085 ,  H03L7/093 ,  H03L7/099 ,  H03L7/0995 ,  H03L7/10 ,  H03L2207/06 ,  H03L2207/50

摘要： A frequency synthesizer includes a digitally-controlled oscillator and an oscillation frequency control unit. The digitally-controlled oscillator includes a loop-shaped transmission line path having an odd number of parallel portions in each of which two conductors are arranged in parallel to each other with a space therebetween, and an odd number of intersection portions in each of which two conductors intersect spatially, an active circuit coupled between the two conductors, and a first variable capacitance unit and a second variable capacitance unit. The oscillation frequency control unit includes a ΣΔ modulation circuit for subjecting to ΣΔ modulation a first control signal for switching a high capacitance state and a low capacitance state of a first variable capacitance element included in the first variable capacitance unit.

摘要翻译： 频率合成器包括数字控制振荡器和振荡频率控制单元。 数字控制振荡器包括具有奇数个并行部分的环形传输线路径，其中每个平行部分中的两个导体彼此平行布置，并且其间具有空格，奇数个交点部分 导体在空间上相交，耦合在两个导体之间的有源电路，以及第一可变电容单元和第二可变电容单元。 振荡频率控制单元包括＆Sgr＆amp; Dgr; 调制电路用于＆Sgr＆amp; Dgr; 调制用于切换包括在第一可变电容单元中的第一可变电容元件的高电容状态和低电容状态的第一控制信号。

公开(公告)号：US07817725B2

公开(公告)日：2010-10-19

申请号：US11074677

申请日：2005-03-09

申请人： Toru Matsuura ,  Hisashi Adachi

发明人： Toru Matsuura ,  Hisashi Adachi

IPC分类号： H04B14/06

CPC分类号： H03M3/368 ,  H03M3/458

摘要： The present invention aims to provide a transmitter circuit that is capable of suppressing quantization noise and operating with a high efficiency, a data converter section 13 and a data conversion method for use therein, and a communications device using the same. The data converter section 13 of the present invention performs a predetermined data conversion operation on an input signal. The data converter section 13 includes: a signal processing section 133 for discretizing the input signal to produce a signal having a lower resolution magnitude-wise than that of the input signal; a subtractor section 134 for subtracting the input signal from the signal having a lower resolution to extract quantization noise; a filter 135 for extracting quantization noise near an intended wave frequency; and a subtractor section 136 for removing the quantization noise near the intended wave frequency from the signal having a lower resolution.

摘要翻译： 本发明旨在提供一种能够抑制量化噪声和高效率操作的发射机电路，数据转换器部分13及其中使用的数据转换方法，以及使用该发射机电路的通信装置。 本发明的数据转换器部分13对输入信号执行预定的数据转换操作。 数据转换器部分13包括：信号处理部分133，用于离散输入信号以产生具有比输入信号幅度更小的分辨率的信号; 减法器部分134，用于从具有较低分辨率的信号中减去输入信号以提取量化噪声; 用于提取预期波频附近的量化噪声的滤波器135; 以及用于从具有较低分辨率的信号中去除预期波频率附近的量化噪声的减法器部分136。

公开(公告)号：US07725082B2

公开(公告)日：2010-05-25

申请号：US11766389

申请日：2007-06-21

申请人： Toshifumi Nakatani ,  Atsushi Yamamoto ,  Hisashi Adachi

发明人： Toshifumi Nakatani ,  Atsushi Yamamoto ,  Hisashi Adachi

IPC分类号： H04B1/44 ,  H04B1/46

CPC分类号： H04B1/525

摘要： Radio communication apparatus comprising an antenna, a transmitting circuit of outputting a transmitting signal in a first frequency band. A duplexer connected to the antenna and having a single-phase input terminal and a balanced output terminal, conveying the transmitting signal inputted to the single-phase input terminal to the antenna. The duplexer outputs a receiving signal in a second frequency band different from the first frequency band received from the antenna substantially as a differential signal from the balanced output terminal. A receiving circuit connected to the balanced output terminal and having a circuit in which a gain of a signal of a differential component is higher than that of a signal of an in-phase component, or a loss of the signal of the differential component is lower than that of the signal of the in-phase component.

摘要翻译： 无线通信装置，包括：天线，输出第一频带的发送信号的发送电路。 连接到天线并具有单相输入端子和平衡输出端子的双工器，将输入到单相输入端子的发送信号传送到天线。 双工器基本上作为来自平衡输出端子的差分信号，输出与从天线接收的第一频带不同的第二频带中的接收信号。 连接到平衡输出端子并具有差分分量的信号的增益高于同相分量的信号的增益或差分分量的信号的损失的电路的接收电路较低 比同相成分的信号。

公开(公告)号：US20090302918A1

公开(公告)日：2009-12-10

申请号：US12471757

申请日：2009-05-26

申请人： Masahiko Sagisaka ,  Hisashi Adachi ,  Taiji Akizuki

发明人： Masahiko Sagisaka ,  Hisashi Adachi ,  Taiji Akizuki

IPC分类号： H03K3/00 ,  H03H11/26

CPC分类号： H03H11/265 ,  H03K5/1515 ,  H03K2005/00026 ,  H03K2005/00097

摘要： A clock signal generation apparatus containing variable delay devices for varying the delay time of two-phase clock signals used in a load circuit that uses non-overlap clock signals; a non-overlap detector for detecting a non-overlap time in the H-level zones of the two-phase clock signals and outputting a detection signal corresponding to the non-overlap time; and a control signal generation section for generating a control signal that is used to control the variable delay devices on the basis of the detection signal from the non-overlap detector, and capable of securely generating the two-phase clock signals having an optimal non-overlap time while absorbing fluctuations due to temperature characteristics, power supply voltage characteristics and individual differences in components.

摘要翻译： 一种时钟信号发生装置，包括用于改变在使用非重叠时钟信号的负载电路中使用的两相时钟信号的延迟时间的可变延迟装置; 一个非重叠检测器，用于检测两相时钟信号的H电平区中的非重叠时间，并输出与非重叠时间对应的检测信号; 以及控制信号生成部，其根据来自所述非重叠检测器的检测信号生成用于控制所述可变延迟器件的控制信号，并能够可靠地生成具有最优非可变延迟器件的两相时钟信号， 重叠时间，同时吸收由于温度特性，电源电压特性和组件个体差异引起的波动。

公开(公告)号：US07619550B2

公开(公告)日：2009-11-17

申请号：US12100236

申请日：2008-04-09

申请人： Tomoaki Maeda ,  Taiji Akizuki ,  Hisashi Adachi

发明人： Tomoaki Maeda ,  Taiji Akizuki ,  Hisashi Adachi

IPC分类号： H03M3/00

CPC分类号： H03M3/364 ,  H03M3/424

摘要： In a delta-sigma modulator circuit, an integrator integrates an input signal, and a quantization circuit quantizes the integrated signal with a predetermined quantization number, and outputs a quantization result signal. A DA converter circuit outputs an analog signal indicating a DA conversion result based on the quantization result signal. An oscillation detector circuit detects that the integrator is in an oscillation state based on the integrated signal, and outputting an oscillation detection signal. A reset circuit resets the integrator based on the oscillation detection signal.

摘要翻译： 在Δ-Σ调制器电路中，积分器对输入信号进行积分，并且量化电路以预定量化数量化积分信号，并输出量化结果信号。 DA转换器电路基于量化结果信号输出表示DA转换结果的模拟信号。 振荡检测器电路基于积分信号检测积分器处于振荡状态，并输出振荡检测信号。 复位电路基于振荡检测信号复位积分器。

公开(公告)号：US20090002088A1

公开(公告)日：2009-01-01

申请号：US11968909

申请日：2008-01-03

申请人： Atsushi Ohara ,  Hisashi Adachi

发明人： Atsushi Ohara ,  Hisashi Adachi

IPC分类号： H03L7/00

CPC分类号： H03L7/0991 ,  H03B5/1215 ,  H03B5/1228 ,  H03B5/1243 ,  H03B5/1265 ,  H03C3/20

摘要： The digital controlled oscillator includes a variable capacitance section having a first capacitor array of a plurality of first variable capacitors and a second capacitor array of a plurality of second variable capacitors, and generates a signal having an oscillation frequency corresponding to the capacitance value of the variable capacitance section. The first capacitance change amount in the individual first variable capacitors is a value obtained by multiplying the second capacitance change amount in the individual second variable capacitors by an integer equal to or more than 2, and the number of second variable capacitors is equal to or more than a value obtained by subtracting 1 from the integer equal to or more than 2.

摘要翻译： 数字控制振荡器包括具有多个第一可变电容器的第一电容器阵列和多个第二可变电容器的第二电容器阵列的可变电容部分，并且产生具有与变量的电容值相对应的振荡频率的信号 电容部分。 各个第一可变电容器中的第一电容变化量是通过将各个第二可变电容器中的第二电容变化量乘以等于或大于2的整数而获得的值，并且第二可变电容器的数量等于或等于 比从等于或大于2的整数减去1得到的值。

公开(公告)号：US20080062024A1

公开(公告)日：2008-03-13

申请号：US11896816

申请日：2007-09-06

申请人： Tomoaki Maeda ,  Hisashi Adachi ,  Taiji Akizuki

发明人： Tomoaki Maeda ,  Hisashi Adachi ,  Taiji Akizuki

IPC分类号： H03M3/02

CPC分类号： H03M3/374 ,  H03M3/43 ,  H03M3/448 ,  H03M3/454

摘要： To provide a method of controlling a delta-sigma modulator and a delta-sigma modulator capable of suppressing a consumption power and also improving a signal-to-noise ratio by implementing both the zero-point shifting technology and the double sampling technology simultaneously, a delta-sigma modulator includes a first integrator (1), a second integrator (2), a third integrator (3), a local feedback (4), delay units (5), a quantizer (6), a DA converter (7), gains (8a to 8c) of the DA converter, gains (9a to 9c) of the integrators, adders (10), no-delay integrators (11) each having a gain “1”, a gain (12) of the local feedback, a DAC (13) of a gain “1”, a delay unit (5) for delaying output signals of the DA converter (7), and a delay unit (5) for delaying an output signal of the local feedback (4).

摘要翻译： 为了提供一种通过同时实现零点移位技术和双重采样技术来控制能够抑制消耗功率并且还提高信噪比的Δ-Σ调制器和Δ-Σ调制器的方法， Δ-Σ调制器包括第一积分器（1），第二积分器（2），第三积分器（3），局部反馈（4），延迟单元（5），量化器（6），DA转换器 ），DA转换器的增益（8 a至8 c），积分器，加法器（10），每个均具有增益“1”的无延迟积分器（11）的增益（9 a至9 c），增益（ 12），增益“1”的DAC（13），用于延迟DA转换器（7）的输出信号的延迟单元（5），以及延迟单元（5），用于将输出信号 当地的反馈（4）。

公开(公告)号：US07321271B2

公开(公告)日：2008-01-22

申请号：US10676654

申请日：2003-10-01

申请人： Koji Takinami ,  Hisashi Adachi ,  Tokio Endoh

发明人： Koji Takinami ,  Hisashi Adachi ,  Tokio Endoh

IPC分类号： H03B5/18

CPC分类号： H03B5/1215 ,  H03B5/1228 ,  H03B5/1253 ,  H03B5/1265 ,  H03B5/1293 ,  H03B2201/025 ,  H03L7/099

摘要： A voltage-controlled oscillator having an inductor circuit, n pieces (n is two or more) of variable capacitance circuit having variable capacitance elements, negative resistance circuits, and reference voltage generation means of generating a reference voltage from a power supply voltage, and wherein a predetermined reference voltage is inputted to some terminals of the variable capacitance elements of the n pieces of variable capacitance circuit, a control voltage is inputted to the other terminals thereof, and of the variable capacitance elements of the n pieces of variable capacitance circuits, the predetermined reference voltage inputted to some terminals of the variable capacitance elements of at least two pieces of the variable capacitance circuit is different.

摘要翻译： 一种具有电感电路的压控振荡器，具有可变电容元件的可变电容电路的n个（n为2个以上），负电阻电路和从电源电压生成基准电压的基准电压生成单元，其中， 将预定的参考电压输入到n个可变电容电路的可变电容元件的一些端子，将一个控制电压输入到其它端子，以及n个可变电容电路的可变电容元件， 输入至少两个可变电容电路的可变电容元件的一些端子的预定参考电压是不同的。

公开(公告)号：US07251462B2

公开(公告)日：2007-07-31

申请号：US10886371

申请日：2004-07-07

申请人： Toru Matsuura ,  Hisashi Adachi ,  Masaharu Udagawa

发明人： Toru Matsuura ,  Hisashi Adachi ,  Masaharu Udagawa

IPC分类号： H04B1/02 ,  H03F3/38 ,  H03F1/26

CPC分类号： H03F1/0222 ,  H03C5/00 ,  H03F1/025 ,  H03F1/0277 ,  H03F2200/372 ,  H03F2203/7239 ,  H04L27/361

摘要： The amplitude modulator comprises: an angle modulator for angle-modulating a phase signal to be inputted; a waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of the amplitude signal is shaped so that the magnitude of the amplitude signal of the portion which becomes small becomes the first prescribed value; and/or (2) the waveform shaping means in which, when the magnitude of the amplitude signal to be inputted becomes larger than the second prescribed value which is larger than the first prescribed value, the waveform of the amplitude signal is shaped so that the magnitude of the amplitude signal of the portion which becomes larger becomes the second prescribed value; and an amplitude modulator for amplitude modulating the signal of the output of the angle modulator by the signal of the output of the waveform shaping means.

摘要翻译： 幅度调制器包括：角度调制器，用于对要输入的相位信号进行角度调制; 波形整形装置，其中（1）当要输入的振幅信号的幅度变得小于第一规定值时，振幅信号的波形被成形为使得变小的部分的振幅信号的幅度 成为第一个规定值; 和/或（2）波形整形装置，其中当要输入的幅度信号的幅度变得大于大于第一规定值的第二规定值时，振幅信号的波形被成形为使得 变大的部分的幅度信号的大小成为第二规定值; 以及幅度调制器，用于通过波形整形装置的输出的信号对角度调制器的输出的信号进行幅度调制。