公开(公告)号：AT521133T

公开(公告)日：2011-09-15

申请号：AT06020327

申请日：2006-09-27

Applicant: YAMAHA CORP

Inventor： MAEJIMA TOSHIO ,  IWAMATSU MASAYUKI

IPC: H03F3/217

Abstract: A class D amplifier includes: an amplifier that generates a digital signal for driving a load based on an input signal; an attenuator that attenuates the input signal according to an attenuation command signal; and a clip prevention controller that outputs the attenuation command signal to intermittently attenuate the input signal when the digital signal is brought into a clip state or a near-clip state.

公开(公告)号：CA2053101C

公开(公告)日：1995-04-18

申请号：CA2053101

申请日：1991-10-09

Applicant: YAMAHA CORP

Inventor： IWAMATSU MASAYUKI

IPC: H04S5/02 ,  G10K15/12 ,  H04S5/00 ,  H04S7/00 ,  H04S3/00

Abstract: In the sound field control device of this invention, main signals and a surround signal are generated on the basis of input left and right 2-channel signals, and 4-channel main sound field signals and 4-channel surround sound field signals, which are respectively aggregations of reflected sound signals of various directions in the respective sound fields, are generated on the basis of reflected sound fields established with respect to the main signals and the surround signal. The 4-channel main sound field signals and the 4channel surround sound field signals of each corresponding channel are combined together and provided as 4-channel sound field signals to be produced as sound. Reflected sounds are created on the basis of reflected sound parameters of a certain established sound field, regardless of sound field components contained in a source signal and output as a sound field signal. By reproducing the sound field signals by sound field control loudspeakers arranged about a listener, an effect that gives to the listener the impression that he is surrounded by the sound can be created.

公开(公告)号：DE3886229T2

公开(公告)日：1994-05-05

申请号：DE3886229

申请日：1988-01-20

Applicant: YAMAHA CORP

Inventor： IWAMATSU MASAYUKI

IPC: G10K15/00 ,  G10K15/12 ,  H04B1/20 ,  H04S1/00 ,  H04S5/02 ,  H04S7/00

Abstract: A sound field control device is capable of producing a sound field effect tone which has a tonal effect providing a listener with a feeling of presence and comprises a sound field effect tone generation circuit (36) for generating a sound field effect tone on the basis of sound field information supplied from a source and a source signal. The sound field effect tone is sounded simultaneously with reproduction of the source signal and a reproduced sound field produced on the basis of the source signal is controlled by this sound field effect tone. In one aspect of the invention, the sound field effect tone generation circuit comprises a convolution operation circuit (39) which subjects a signal derived from left and right signals from the source signal to convolution operation with sound field data derived on the basis of the sound field information from the source signal.

公开(公告)号：DE3886229D1

公开(公告)日：1994-01-27

申请号：DE3886229

申请日：1988-01-20

Applicant: YAMAHA CORP

Inventor： IWAMATSU MASAYUKI

IPC: G10K15/00 ,  G10K15/12 ,  H04B1/20 ,  H04S1/00 ,  H04S5/02 ,  H04S7/00

Abstract: A sound field control device is capable of producing a sound field effect tone which has a tonal effect providing a listener with a feeling of presence and comprises a sound field effect tone generation circuit (36) for generating a sound field effect tone on the basis of sound field information supplied from a source and a source signal. The sound field effect tone is sounded simultaneously with reproduction of the source signal and a reproduced sound field produced on the basis of the source signal is controlled by this sound field effect tone. In one aspect of the invention, the sound field effect tone generation circuit comprises a convolution operation circuit (39) which subjects a signal derived from left and right signals from the source signal to convolution operation with sound field data derived on the basis of the sound field information from the source signal.

公开(公告)号：JP2011138983A

公开(公告)日：2011-07-14

申请号：JP2009299160

申请日：2009-12-29

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H01L21/822 ,  H01L27/04

Abstract: PROBLEM TO BE SOLVED: To provide an integrated circuit which improves a sound quality compared with a conventional product, and incorporates a circuit for analog sound signal processing. SOLUTION: In the integrated circuit 10, analog sound signals input from input terminals 12, 14 are voltage-divided by a resistor network 20 composed of resistance elements R1, R2 and input to a non-inverting input terminal of an operational amplifier 22. An output signal from the operational amplifier 22 is voltage-divided by a resistor network 24 composed of resistance elements R3, R4 and fed back to an inverting input terminal of the operational amplifier 22. Signals from both the ends of the resistance elements R3, R4 are output from output terminals 16, 18. Each of the resistance elements R1 to R4 composing respective resistor networks 20, 24 is composed of a two-layer lamination structure of a tantalum nitride layer 30 and a tantalum layer 28. COPYRIGHT: (C)2011,JPO&INPIT

Abstract translation: 要解决的问题：提供一种与常规产品相比提高声音质量的集成电路，并且包括用于模拟声音信号处理的电路。 解决方案：在集成电路10中，从输入端子12,14输入的模拟声音信号由电阻元件R1，R2组成的电阻网络20进行分压，并输入到运算放大器的非反相输入端 来自运算放大器22的输出信号被由电阻元件R3，R4组成的电阻网络24分压，并被反馈到运算放大器22的反相输入端。信号从电阻元件R3的两端 R4由输出端子16,18输出。构成各个电阻网络20,24的各电阻元件R1〜R4由氮化钽层30和钽层28的双层叠层结构构成。 版权所有（C）2011，JPO＆INPIT

公开(公告)号：JP2009284233A

公开(公告)日：2009-12-03

申请号：JP2008134380

申请日：2008-05-22

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: G10K15/04 ,  H04N5/44

Abstract: PROBLEM TO BE SOLVED: To provide a display device capable of confirming that it is under activation processing after power activation, and to provide a control method.
SOLUTION: When a user performs an operation so as to turn on the power, the display device 1 relating to this embodiment can reproduce and emit musical sound data stored in a musical sound data storage part 104 beforehand until activation processing in a signal reproduction part 102 is ended and video images and sound relating to reception signals are output. Thus, since the user can listen to the emitted musical sound from the display device 1 after the operation of turning the power ON, he/she can recognize that it is under the activation processing even when the video images and the sound relating to the reception signals are not output.
COPYRIGHT: (C)2010,JPO&INPIT

Abstract translation: 要解决的问题：提供能够确认其在动力激活之后处于激活处理的显示装置，并提供控制方法。 解决方案：当用户执行操作以打开电源时，与本实施例相关的显示装置1可以预先存储和发出存储在音乐声音数据存储部分104中的音乐声音数据，直到信号中的激活处理 再现部分102结束，并且输出与接收信号有关的视频图像和声音。 因此，由于用户能够在打开电源的操作之后听取来自显示装置1的发出的音乐声音，所以即使当视频图像和与接收相关的声音时，他/她也可以识别它处于激活处理 信号不输出。 版权所有（C）2010，JPO＆INPIT

公开(公告)号：JP2009130642A

公开(公告)日：2009-06-11

申请号：JP2007303725

申请日：2007-11-22

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H04R3/12 ,  H04N5/60 ,  H04R1/02

Abstract: PROBLEM TO BE SOLVED: To provide a television set capable of providing an external speaker device to be externally connected at a low cost and by free design, an AV system, an audio signal supplying apparatus and an audio signal processing method. SOLUTION: The television set 1 relating to this embodiment stores a plurality of parameters for an external speaker corresponding to the kinds of the external speaker device 100 in a storage part 25 separately from the parameters for an internal speaker for the parameters when adjusting the frequency characteristics of audio signals set to a sound quality adjustment part 22. By selecting the parameter for the external speaker corresponding to the kind of the external speaker device 100 connected to a connection terminal 29 and setting it to the sound quality adjustment part 22, the sound of similar frequency characteristics can be emitted even when the kind of the external speaker device 100 is changed. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：提供一种能够以低成本提供外部扬声器装置并通过免费设计，AV系统，音频信号提供装置和音频信号处理方法的电视机。 ＆lt;解决方案＆gt;本实施例的电视机1在与调整用的参数的内部扬声器的参数分开地存储与存储部25中的外部扬声器装置100的种类相对应的外部扬声器的多个参数 通过选择与连接到连接端子29的外部扬声器装置100的种类相对应的外部扬声器的参数并将其设置到声音质量调节部分22， 即使外部扬声器装置100的种类发生变化，也能够发出类似频率特性的声音。 版权所有（C）2009，JPO＆INPIT

公开(公告)号：JP2008306269A

公开(公告)日：2008-12-18

申请号：JP2007149201

申请日：2007-06-05

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H03F1/02 ,  H03F3/21

Abstract: PROBLEM TO BE SOLVED: To reduce loss in a power amplifying circuit which drives a capacitive load.
SOLUTION: The power amplifying circuit comprises a pre-amplifying circuit 110 and a BTL-connected amplifying circuit 140 for amplifying input signals Vin and Vip, generating output signals, and driving a piezoelectric loudspeaker 120 as a capacitive load, a current measuring section 131 for detecting a consumption current of the BTL-connected amplifying circuit 140, and a control section 130 for controlling a voltage supplied to the BTL-connected amplifying circuit 140 according to the result of detection by the current measuring section 131 and the output signal of the comparator 132.
COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：减少驱动电容性负载的功率放大电路的损耗。 解决方案：功率放大电路包括预放大电路110和用于放大输入信号Vin和Vip的BTL连接的放大电路140，产生输出信号，并驱动压电扬声器120作为电容性负载，电流测量 用于检测BTL连接的放大电路140的消耗电流的部分131;以及控制部分130，用于根据电流测量部分131的检测结果和输出信号控制提供给BTL连接的放大电路140的电压 比较方案132.（C）2009，JPO＆INPIT

公开(公告)号：JP2008283071A

公开(公告)日：2008-11-20

申请号：JP2007127106

申请日：2007-05-11

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H01L21/822 ,  H01L21/8234 ,  H01L21/8238 ,  H01L27/04 ,  H01L27/088 ,  H01L27/092 ,  H03K5/02

Abstract: PROBLEM TO BE SOLVED: To form, on the same semiconductor substrate, a plurality of circuits that operate at different power supply voltages. SOLUTION: A P-type semiconductor substrate 10 includes a first region AA and a second region BB. In the first region AA, a P-type MOS 22, an N-type MOS 32 and a P-type MOS 42 are formed, and in the second region BB, an N-type MOS 52 is formed. The P-type MOS 22 and the N-type MOS 32 constitute a circuit A, and the P-type MOS 42 and the N-type MOS 52 constitute a circuit B. A P well 60 of the N-type MOS 52 is electrically disconnected from the semiconductor substrate 10 by the N well 60. Thus a power supply voltage of 5.5 V-GND is supplied to the circuit A, and a power supply voltage of ±2.75 V can be supplied to the circuit B. COPYRIGHT: (C)2009,JPO&INPIT

Abstract translation: 要解决的问题：在相同的半导体衬底上形成在不同电源电压下工作的多个电路。 解决方案：P型半导体衬底10包括第一区域AA和第二区域BB。 在第一区域AA中，形成P型MOS22，N型MOS32和P型MOS42，在第二区域BB中形成N型MOS 52。 P型MOS22和N型MOS32构成电路A，P型MOS42和N型MOS52构成电路B.N型MOS52的AP阱60电断开 由半导体衬底10通过N阱60.因此，5.5V-GND的电源电压被提供给电路A，并且可以向电路B提供±2.75V的电源电压。版权所有： （C）2009，JPO＆INPIT

公开(公告)号：JP2004140650A

公开(公告)日：2004-05-13

申请号：JP2002304156

申请日：2002-10-18

Applicant: Yamaha Corp ,  ヤマハ株式会社

Inventor： IWAMATSU MASAYUKI

IPC: H03F1/26 ,  H03G3/02

Abstract: PROBLEM TO BE SOLVED: To provide a sound volume control circuit which can minimize residual noise of a DAC and also minimize an increase in cost due to use of a multistage volume for an analog signal.
SOLUTION: A 1st variable gain part 2 controls the sound volume of digital musical sound data outputted from a decoder 1. A 2nd variable gain part 5 controls the sound volume of the output of the DAC. A microcomputer 11 makes the gain of the 2nd variable gain part 5 constant and sets the gain of the 1st variable gain part 2 to a value corresponding to a set value of a knob 7 when the set value of the knob 7 is ≥0 dB, makes the gain of the 1st variable gain part 2 constant and sets the gain of the 2nd variable gain part 5 to a value corresponding to the set value of the knob 7 when the set value of the knob 7 is

Abstract translation: 要解决的问题：提供可以最小化DAC的残余噪声的音量控制电路，并且还由于对模拟信号使用多级音量而使成本增加最小化。 解决方案：第一可变增益部分2控制从解码器1输出的数字音乐数据的音量。第二可变增益部分5控制DAC的输出的音量。 当旋钮7的设定值≥0dB时，微型计算机11使第二可变增益部分5的增益恒定，并将第一可变增益部分2的增益设置为与旋钮7的设定值对应的值， 使得第一可变增益部分2的增益恒定，并且当旋钮7的设定值<0dB和≥-36时，将第二可变增益部分5的增益设置为对应于旋钮7的设定值的值 ，并且当旋钮7的设定值<-36dB时，使第二可变增益部分5的增益恒定，并将第一可变增益部分2的增益设置为旋钮7的设定值。 版权所有（C）2004，JPO