公开(公告)号：US5257415A

公开(公告)日：1993-10-26

申请号：US851614

申请日：1992-03-16

申请人： Yoshiaki Kumagai ,  Eiji Itaya ,  Yoichi Endo

发明人： Yoshiaki Kumagai ,  Eiji Itaya ,  Yoichi Endo

IPC分类号： H03G3/20 ,  H04B1/04 ,  H04B7/005 ,  H04L27/26

CPC分类号： H04W52/52 ,  H03G3/3047 ,  H04L27/2608 ,  H04B2001/0416

摘要： An automatic transmission level control device used in a multi-carrier communication system includes a gain controller for controlling a level of a transmission signal, a transmitter for amplifying the transmission signal, and a hybrid circuit for extracting a part of power of the transmission signal from the transmitter. A level control circuit adjusts a gain of the gain controller on the basis of a magnitude of the transmission signal and data indicating a number of carriers included in the transmission signal. A carrier detection unit filters the transmission signal and generates the data indicating the number of carriers included therein.

摘要翻译： 在多载波通信系统中使用的自动发送电平控制装置包括用于控制发送信号的电平的增益控制器，用于放大发送信号的发送器，以及用于从发送信号的一部分提取发送信号的一部分电力的混合电路 发射机。 电平控制电路根据发送信号的大小和指示包含在发送信号中的载波数的数据来调整增益控制器的增益。 载波检测单元对发送信号进行滤波，并生成表示其中包含的载波数的数据。

公开(公告)号：US5235292A

公开(公告)日：1993-08-10

申请号：US892923

申请日：1992-06-03

申请人： Yoichi Endo ,  Eiji Itaya ,  Yoshiaki Kumagai

发明人： Yoichi Endo ,  Eiji Itaya ,  Yoshiaki Kumagai

IPC分类号： H03K17/00 ,  G06F7/68 ,  H03L7/00 ,  H03L7/08

CPC分类号： G06F7/68 ,  H03L7/0807

摘要： A signal generator having a switching function includes a first oscillation circuit, a second oscillation circuit, a frequency-division circuit and a combination circuit. The first oscillation circuit outputs a first frequency signal having a first frequency and a reset signal synchronized with the first frequency signal. The second oscillation circuit outputs a second frequency signal having a second frequency which is N times higher than the first frequency. The frequency-division circuit frequency-divides the second frequency signal by N, resets a value for frequency-division based on the reset signal and generates a divided second frequency signal. The combination circuit combines the first frequency signal and the divided second frequency signal and outputs a combined signal.

公开(公告)号：US06010578A

公开(公告)日：2000-01-04

申请号：US977228

申请日：1997-11-24

申请人： Makoto Ono ,  Masahiro Hattori ,  Eiji Itaya ,  Yutaka Yanagawa

发明人： Makoto Ono ,  Masahiro Hattori ,  Eiji Itaya ,  Yutaka Yanagawa

IPC分类号： B23K1/19 ,  B23K35/36 ,  B23K35/363

CPC分类号： B23K35/3605

摘要： A flux for brazing aluminum members comprising potassium tetrafluoroaluminate, potassium pentafluoroaluminate and oxyfluoroaluminum, accomplishing the brazing of aluminum members at temperatures 5.degree. C. to 20.degree. C. lower than the temperature of conventional brazing that uses fluoride fluxes. Thus, heating energy required for the brazing can thus be saved, and conventional brazing equipment can be used as it is, in principle, without any changes; and since no expensive elements are used in the fluxes, the cost of brazing aluminum members can be reduced.

摘要翻译： 用于钎焊铝构件的助熔剂包括四氟铝酸钾，五氟铝酸钾和氟氟铝，在比使用氟化物通量的常规钎焊的温度低5℃至20℃的温度下实现铝构件的钎焊。 因此，可以节省钎焊所需的加热能量，原则上可以直接使用常规的钎焊设备，没有任何变化; 并且由于在助熔剂中不使用昂贵的元素，所以可以降低铜构件的钎焊成本。

公开(公告)号：US5548811A

公开(公告)日：1996-08-20

申请号：US336205

申请日：1994-11-03

申请人： Yoshiaki Kumagai ,  Eiji Itaya ,  Yoichi Endo

发明人： Yoshiaki Kumagai ,  Eiji Itaya ,  Yoichi Endo

IPC分类号： H03J7/04 ,  H03J7/06 ,  H04B1/18

CPC分类号： H03J7/047 ,  H03J7/065

摘要： An automatic frequency control (AFC) circuit receives input signals and generates converted signals by mixing the input signals with a local oscillation signal. An extraction circuit extracts a pilot signal, if present, from the input signals and provides the pilot signal to a switch. A frequency divider divides a frequency of the local oscillation signal output from a voltage control oscillator, and provides the frequency-divided local oscillation signal to the switch. The output of the switch is compared with a reference frequency in a phase comparator which generates a comparison result which controls the voltage controlled oscillator. If the pilot signal is not present, the switch selects the frequency-divided oscillation signal, to construct a phase-locked loop to stabilize the frequency of the local oscillation signal. Alternatively, an AFC circuit includes a frequency divider for selectively dividing a frequency of a pilot signal included in the converted signal. Various frequencies of the pilot signal can be received by altering a division number in the frequency divider.

摘要翻译： 自动频率控制（AFC）电路接收输入信号并通过将输入信号与本地振荡信号混合来产生转换的信号。 提取电路从输入信号中提取导频信号（如果有的话），并向导频提供导频信号。 分频器分压从压控振荡器输出的本地振荡信号的频率，并向开关提供分频本机振荡信号。 将开关的输出与相位比较器中的参考频率进行比较，该相位比较器产生控制压控振荡器的比较结果。 如果导频信号不存在，则开关选择分频振荡信号，构成锁相环，以稳定本振信号的频率。 或者，AFC电路包括用于选择性地分频转换信号中包括的导频信号的频率的分频器。 可以通过改变分频器中的分频数来接收导频信号的各种频率。

公开(公告)号：US4906534A

公开(公告)日：1990-03-06

申请号：US283315

申请日：1988-12-09

申请人： Yoichiro Bekki ,  Shigenori Asami ,  Kazunori Ishikawa ,  Takeyoshi Doko ,  Eiji Itaya

发明人： Yoichiro Bekki ,  Shigenori Asami ,  Kazunori Ishikawa ,  Takeyoshi Doko ,  Eiji Itaya

IPC分类号： B23K35/02 ,  B23K35/28

CPC分类号： B23K35/286 ,  B23K35/0238 ,  Y10T428/12764

摘要： Aluminum thin plates which are used as fins of a heat exchanger can be manufactured, as described in the claims, by controlling the composition of an aluminum alloy, which is used as a core material, and controlling the cold rolling reduction ratio of a clad material composed of the core material and a skin material, after hot rolling. The thus manufactured aluminum thin plates for brazing are excellent in high-temperature sagging resistance and sacrificial anodic effect, whereby it is possible to make the fins thinner.

摘要翻译： 用作热交换器的翅片的铝薄板可以通过控制用作芯材的铝合金的组成并控制包覆材料的冷轧压下率来制造，如权利要求所述 由热轧后的核心材料和表皮材料组成。 如此制造的用于钎焊的铝薄板具有优异的高温下垂阻力和牺牲阳极效应，由此可以使翅片更薄。

公开(公告)号：US4625180A

公开(公告)日：1986-11-25

申请号：US813139

申请日：1985-12-24

申请人： Eiji Itaya ,  Takeshi Takano ,  Takaharu Nakamura

发明人： Eiji Itaya ,  Takeshi Takano ,  Takaharu Nakamura

IPC分类号： H03L7/18 ,  H03L7/08 ,  H03L7/081 ,  H03L7/087 ,  H03L7/199

CPC分类号： H03L7/081 ,  H03L7/0802 ,  H03L7/087 ,  H03L7/199

摘要： A frequency synthesizer having an intermittently operated PLL circuit in which power is intermittently applied to a prescaler to reduce power consumption. The PLL circuit is operated such that fluctuations in the frequency synthesizer output frequency do not occur. This stability in the output frequency results from selectively providing signals to the phase comparator within the PLL circuit only during a time period beginning after power is applied to the prescaler and ending before power is removed from the prescaler.

摘要翻译： 一种具有间歇操作的PLL电路的频率合成器，其中间歇地施加电力给预分频器以降低功耗。 操作PLL电路使得不会发生频率合成器输出频率的波动。 输出频率的这种稳定性是由于只有在向预分频器施加电源并在从预分频器断电之前结束的时间段内，才可以选择性地向PLL电路内的相位比较器提供信号。

公开(公告)号：US4394626A

公开(公告)日：1983-07-19

申请号：US211847

申请日：1980-12-01

申请人： Hiroshi Kurihara ,  Sadao Takenaka ,  Eiji Itaya

发明人： Hiroshi Kurihara ,  Sadao Takenaka ,  Eiji Itaya

IPC分类号： H03L7/10 ,  H03L7/087 ,  H04L7/027 ,  H04L27/00 ,  H04L27/227 ,  H03L7/08

CPC分类号： H04L27/2273 ,  H03L7/087 ,  H04L7/027 ,  H04L2027/003 ,  H04L2027/0057

摘要： A phase synchronizing circuit, wherein two phase detectors are used in quadrature to detect the phase of an input signal and to avoid hang-up when the phase of the input signal changes abruptly by 180.degree.. The two detected phase signals are then multiplied by a locally generated reference signal and re-combined, so that a synchronized output signal having reduced phase jitter results. This circuit is also incorporated in an N-phase PSK system, where it is used as a synchronizer and not as a demodulator. In a receiver for such a PSK system, the frequency of the received signal is multiplied by N, the phase synchronizer circuit of the invention is then used to extract the carrier (at a N times higher frequency), and a divider is then used to convert the synchronized carrier provided by the synchronizer circuit of the invention down to the original frequency.

摘要翻译： 相位同步电路，其中两相检测器用于正交检测输入信号的相位，并且当输入信号的相位突然变化180°时避免挂起。 然后将两个检测到的相位信号乘以本地产生的参考信号并重新组合，使得具有降低的相位抖动的同步输出信号结果。 该电路也被并入N相PSK系统中，其被用作同步器而不是解调器。 在这种PSK系统的接收机中，将接收信号的频率乘以N，然后使用本发明的相位同步器电路提取载波（频率为N倍），然后使用分频器 将由本发明的同步器电路提供的同步载波转换为原始频率。

公开(公告)号：US5903592A

公开(公告)日：1999-05-11

申请号：US723030

申请日：1996-09-30

申请人： Eiji Itaya

发明人： Eiji Itaya

IPC分类号： H04J13/00 ,  H04B1/707 ,  H04B7/26 ,  H04L12/28 ,  H04B1/69 ,  H04B3/36

CPC分类号： H04B7/2628

摘要： A radio transmission system is provided which includes a master station and a plurality of series connected substations connected to the master station via a radio channel. First receiving unit receives a plurality of modulated waves which have been modulated by means of spread spectrum. Accordingly, demodulating unit may only have a capability to process a baseband signal destined therefor, in order to demodulate the modulated wave destined therefor from among the modulated waves. On the other hand, the modulated waves received by the first receiving unit are transmitted by first transmitting unit in a first transmission direction to an adjacent substation, and thus are relayed as they are without being demodulated or modulated in the middle.

摘要翻译： 提供了一种无线电传输系统，其包括主站和经由无线电信道连接到主站的多个串联连接的分站。 第一接收单元接收已经通过扩频调制的多个调制波。 因此，解调单元只能具有处理其目的地的基带信号的能力，以便从调制波中解调其目的地的调制波。 另一方面，由第一接收单元接收的调制波由第一发送单元在第一发送方向发送到相邻的分站，因此按照它们中继而不在中间进行解调或调制。

公开(公告)号：US4968951A

公开(公告)日：1990-11-06

申请号：US443150

申请日：1989-11-30

申请人： Eiji Itaya ,  Yoshiaki Kumagai

发明人： Eiji Itaya ,  Yoshiaki Kumagai

IPC分类号： H03L7/10 ,  H03L7/18

CPC分类号： H03L7/18

摘要： A phase locked loop for extracting an output signal synchronized with an input signal. The present invention is structured so that a phase locked loop can prevent loss of control due to high frequency noise generated by a level conversion circuit in the feedback loop after oscillation of the VCO has stopped due to a failure. The phase locked loop includes an exchange circuit connected between an output of the phase detector and an input to the feedback loop. When the exchange circuit determines that the output of the phase detector is below a reference voltage, it applies a signal having a frequency which is lower than that of the input signal to the phase detector in place of a signal from a frequency divider in the feedback loop. In such a case, the phase detector outputs a pulse signal which restarts oscillation of the VCO and leads to normal phase control operation.

摘要翻译： 用于提取与输入信号同步的输出信号的锁相环。 本发明的结构使得由于失败导致VCO的振荡停止之后，锁相环可以防止由反馈环路中的电平转换电路产生的高频噪声导致的控制丢失。 锁相环包括连接在相位检测器的输出端和反馈回路的输入端之间的交换电路。 当交换电路确定相位检测器的输出低于参考电压时，它将具有低于输入信号的频率的信号施加到相位检测器，以代替来自反馈中的分频器的信号 循环。 在这种情况下，相位检测器输出重新启动VCO的振荡并导致正常相位控制操作的脉冲信号。

公开(公告)号：US4114710A

公开(公告)日：1978-09-19

申请号：US716183

申请日：1976-08-20

申请人： Tadayoshi Katoh ,  Eiji Itaya

发明人： Tadayoshi Katoh ,  Eiji Itaya

IPC分类号： H04L27/04 ,  H04J99/00 ,  H04L25/497 ,  H04L27/38 ,  H04L27/24

CPC分类号： H04L27/3836

摘要： A carrier regeneration circuit regenerates the carrier from the QAM (Quadrature Amplitude Modulated) received signal, as produced and transmitted by a quadrature partial response modulation system wherein quadrature-related carriers (i.e., having a phase difference of 90.degree.) of the same frequency are amplitude modulated with two parallel signals which have been subject to partial response conversion. The carrier regeneration circuit comprises a probability decision circuit which decides the probability of generation of particular demodulated data code combinations, and a carrier regeneration control circuit which maintains the phase ambiguity of the regenerated carrier within an integer multiple of 90.degree.. The control circuit responds to the output of the probability decision circuit for selectively shifting the phase of the regenerated carrier by 45.degree..

摘要翻译： 载波再生电路从由相同频率的正交相关载波（即，具有90°的相位差）的正交部分响应调制系统产生和发送的QAM（正交幅度调制）接收信号再生载波， 使用已经进行部分响应转换的两个并行信号进行幅度调制。 载波再生电路包括决定特定解调数据代码组合的生成概率的概率判定电路以及将再生载波的相位模糊度维持在90度的整数倍的载波再生控制电路。 控制电路响应于概率判定电路的输出，以选择性地将再生载波的相位移位45度。