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公开(公告)号：EP2782361A4
公开(公告)日：2015-07-08
申请号：EP12843176
申请日：2012-10-25
发明人： YASUDA AKIRA , OKAMURA JUN-ICHI
CPC分类号： H03F3/2175 , G06F17/3074 , H03F2200/331 , H04H20/88 , H04R1/005 , H04R3/00 , H04R9/063 , H04R27/00 , H04R2209/026 , H04R2209/041 , H04R2460/03
摘要： Provided is a digital acoustic system comprising: a ”£ modulator that modulates a digital input signal and outputs a digital signal; a post-filter that is connected to the ”£ modulator and which performs mismatch shaping to convert the digital signal; a parallel-serial converter that converts the digital signal converted by the post-filter into a digital signal which is serially transmitted; a serial-parallel converter that restores the digital signal converted by the parallel-serial converter; and a drive circuit which receives the digital signal restored by the serial-parallel converter, and drives drive elements to convert the signal into an analog audio signal.
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公开(公告)号：EP2744223A4
公开(公告)日：2015-05-13
申请号：EP12824145
申请日：2012-08-09
发明人： YASUDA AKIRA , OKAMURA JUN-ICHI
IPC分类号： H04R3/00 , H03K17/695 , H03M3/02 , H04R1/00
摘要： As one embodiment of the present invention, provided is a drive circuit to which a three-value signal including a value representing zero is input, and that outputs two two-value signals that drive two drive elements such that the difference between values representing the two two-value signals corresponds to a value representing the input three-value signal, the drive circuit being characterized by the combination of the output two two-value signals when the value of the input three-value signal represents zero being determined in accordance with the input history of the three-value signal. The drive circuit may also be provided with a memory that records a flag value that is reversed in accordance with the input history of the input three-value signal, and the combination of the output two two-value signals being determined in accordance with the flag.
摘要翻译： 作为本发明的一个实施例，提供了一种驱动电路，其中输入了包括代表零的值的三值信号，并且输出驱动两个驱动元件的两个二值信号，使得表示两个值的值之间的差异 两值信号对应于表示输入三值信号的值，当输入三值信号的值表示零时，驱动电路的特征在于输出两个两值信号的组合，根据 输入三值信号的历史记录。 驱动电路还可以设置有存储器，其根据输入三值信号的输入历史记录反转的标志值，并且输出的两个两值信号的组合根据标志确定 。
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公开(公告)号：EP2515555A4
公开(公告)日：2013-08-28
申请号：EP10788219
申请日：2010-11-02
发明人： YASUDA AKIRA , OKAMURA JUN-ICHI
CPC分类号： H04R3/14 , G06F17/3074 , H04R3/12 , H04R2420/00 , H04R2420/03 , H04R2420/05 , H04R2430/01 , H04R2430/03 , H04R2499/13
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公开(公告)号：EP2391014A4
公开(公告)日：2014-01-08
申请号：EP10835733
申请日：2010-05-31
发明人： YASUDA AKIRA , OKAMURA JUN-ICHI
CPC分类号： H03M1/066 , H03M1/74 , H03M3/502 , H04R3/00 , H04R2420/03
摘要： Provided is a selection device including an acquisition section for acquiring digital selection signals, and an output section for outputting selection signals to respective unit cells, each unit cell capable of being commanded to output the value zero. The selection device is characterized in that : each selection signal is for commanding the unit cell to output a value corresponding to that selection signal; the sum of the values to be output as commanded by the respective selection signals, which are output to the respective unit cells, is a value determined in association with the digital selection signal; and if the output corresponding to the digital selection signal is the value zero, then selection signals each commanding to output a non-zero value (N) are output to some of the unit cells.
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公开(公告)号：EP2913931A4
公开(公告)日：2016-08-03
申请号：EP13848684
申请日：2013-10-25
发明人： YASUDA AKIRA , OKAMURA JUN-ICHI
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公开(公告)号：EP2693626A4
公开(公告)日：2015-11-25
申请号：EP12765494
申请日：2012-03-23
发明人： YASUDA AKIRA , OKAMURA JUN-ICHI
CPC分类号： H02P6/005 , H02M7/53875 , H02P27/06
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公开(公告)号：EP2187657A4
公开(公告)日：2014-12-03
申请号：EP09766515
申请日：2009-05-29
发明人： OKAMURA JUN-ICHI , YASUDA AKIRA
IPC分类号： H04R3/00 , G10K11/178 , H04R15/00 , H04R19/02
CPC分类号： H04R3/00 , H03F3/211 , H03F3/217 , H04R1/005 , H04R1/1008 , H04R3/12 , H04R15/00 , H04R27/00 , H04R2227/003 , H04R2499/13 , H04R2499/15
摘要： Proposed is a digital sound system most suitable for a digital speaker device for directly converting analog sound by a circuit using a ”£ modulator and a mismatch shaping filter circuit to output a plurality of digital signals and a plurality of speakers driven by the plurality of digital signals. Provided is a digital speaker driving device characterized in that the device is constituted of a ”£ modulator, a post filter, s driving circuits, and a power supply circuit for supplying power to the ”£ modulator, the post filter and the s driving elements and that the s driving circuits are adapted to s digital signal terminals.
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