公开(公告)号：US4115739A

公开(公告)日：1978-09-19

申请号：US788324

申请日：1977-04-18

申请人： Nobuya Sano ,  Hiroshi Goto ,  Yutaka Hirota

发明人： Nobuya Sano ,  Hiroshi Goto ,  Yutaka Hirota

IPC分类号： H03F1/02 ,  H03F1/32 ,  H03F3/18 ,  H03F3/20 ,  H03F3/26 ,  H03F3/30 ,  H03F3/68 ,  H03F3/183

CPC分类号： H03F1/0222 ,  H03F1/0233 ,  H03F1/0261 ,  H03F1/32 ,  H03F3/20 ,  H03F3/26 ,  H03F3/3076 ,  H03F3/68

摘要： In order to eliminate distortion a power amplifier is biased to Class-A or Class-B operation and in order to minimize the power loss the supply voltage of a power source is decreased as much as possible and the power source is driven by another highly efficient power amplifier so as to follow an output voltage.

摘要翻译： 为了消除失真，功率放大器被偏置到A类或B类操作，并且为了最小化功率损耗，电源的电源电压尽可能地减小，并且电源由另一种高效率驱动 功率放大器，以便跟随输出电压。

公开(公告)号：US4105945A

公开(公告)日：1978-08-08

申请号：US778148

申请日：1977-03-16

申请人： Nobuya Sano ,  Hiroshi Goto ,  Yutaka Hirota

发明人： Nobuya Sano ,  Hiroshi Goto ,  Yutaka Hirota

IPC分类号： G11B23/00 ,  H03F1/34 ,  H03G5/00 ,  H03H11/28 ,  H04R3/08

CPC分类号： G11B23/0007 ,  H03F1/34 ,  H03G5/00 ,  H03H11/28 ,  H04R3/08

摘要： An active load circuit is interconnected between a signal source such as a pickup cartridge and an amplifier which acts as an impedance matching resistor. An equivalent resistance provided by the amplifier as viewed from the signal source equals a required resistance for impedance matching, and the noise voltage is considerably reduced as compared with that produced by a conventional matching resistor.

摘要翻译： 有源负载电路在诸如拾取盒的信号源和用作阻抗匹配电阻器的放大器之间互连。 从信号源观察放大器提供的等效电阻等于阻抗匹配所需的电阻，并且与常规匹配电阻器相比，噪声电压显着降低。

公开(公告)号：US06445872B1

公开(公告)日：2002-09-03

申请号：US09194232

申请日：1998-11-23

申请人： Nobuya Sano ,  Makoto Iida

发明人： Nobuya Sano ,  Makoto Iida

IPC分类号： H04N591

CPC分类号： H04N21/4147 ,  G11B20/10 ,  H04N5/4401 ,  H04N5/775 ,  H04N9/8042 ,  H04N9/8227 ,  H04N21/4263 ,  H04N21/4325 ,  H04N21/4334 ,  H04N21/4583 ,  H04N21/47214 ,  H04N21/4882

摘要： A bit stream which is a data string including coded data of a multiplicity of channels is output from a tuner section 22, and a recording channel selection section 23 selects coded data of a desired channel from the bit stream and output by configuring the data string. The data string output from the recording channel selection section 23 is recorded to and reproduced from a magnetic tape of a recording and reproducing section 24 by a rotary head. The coded data of the data string reproduced from the recording and reproducing section 24 is discompression-encoded by an MPEG2 decoder 25 and a video signal is output.

摘要翻译： 作为包含多个通道的编码数据的数据串的比特流是从调谐器部分22输出的，记录频道选择部分23从位流中选择所需频道的编码数据并通过配置数据串来输出。 从记录通道选择部分23输出的数据串通过旋转磁头记录到记录和再现部分24的磁带并从其再现。 从记录和再现部分24再现的数据串的编码数据由MPEG2解码器25进行解压缩编码，并输出视频信号。

公开(公告)号：US4105935A

公开(公告)日：1978-08-08

申请号：US733023

申请日：1976-10-15

申请人： Kazuo Arai ,  Yoshiaki Igarashi ,  Masaki Suzuki ,  Nobuya Sano ,  Toshikazu Yosumi

发明人： Kazuo Arai ,  Yoshiaki Igarashi ,  Masaki Suzuki ,  Nobuya Sano ,  Toshikazu Yosumi

IPC分类号： H02P23/00 ,  H02P5/10

CPC分类号： H02P23/22 ,  Y10S388/915 ,  Y10S388/916

摘要： A motor speed control apparatus has a frequency generator for generating a frequency signal the frequency of which is proportional to the motor speed; a first pulse generator for producing a first pulse train having the same period as that of the frequency signal, each pulse of the first pulse train having a pulse width which is shorter than the period of the frequency signal and decreases as the frequency of the frequency signal increases; a second pulse generator for producing a second pulse train, the leading edges of the pulses of the second pulse train coinciding in timing with those of the first pulse train, each pulse of the second pulse train having a constant pulse width nearly the same as that of each pulse of the first pulse train obtained by the motor rotation at a predetermined speed; and a subtractor for producing a third pulse train by the subtraction of the pulses of the first pulse train and the corresponding pulses of the second pulse train, whereby there is produced a motor torque in correspondence with the third pulse train, and the motor speed can be controlled with suppressed motor vibration and excellent torque-speed characteristics of the motor.

摘要翻译： 电动机速度控制装置具有用于产生其频率与电动机速度成比例的频率信号的频率发生器; 用于产生与频率信号具有相同周期的第一脉冲串的第一脉冲发生器，第一脉冲串的每个脉冲具有比频率信号的周期短的脉冲宽度，并且随着频率的频率而减小 信号增加; 用于产生第二脉冲串的第二脉冲发生器，第二脉冲序列的脉冲的前沿与第一脉冲序列的脉冲的时序重合，第二脉冲序列的每个脉冲具有与之相同的恒定脉冲宽度 通过电机以预定速度旋转获得的第一脉冲串的每个脉冲; 以及用于通过减去第一脉冲序列的脉冲和第二脉冲串的相应脉冲来产生第三脉冲串的减法器，由此产生与第三脉冲串对应的电动机转矩，并且电动机速度可以 受电机振动抑制和电动机转矩特性优异的控制。