-
公开(公告)号：US07528662B2
公开(公告)日：2009-05-05
申请号：US11490191
申请日：2006-07-21
IPC分类号： H03F3/04
CPC分类号： H03F3/2173 , H03F1/0211 , H03F1/30 , H03F3/181 , H03F3/68 , H03F2200/504
摘要： A signal amplification apparatus which supplies an input signal to a signal processing section to perform signal processing on the input signal, amplifies a power supply voltage supplied from a power source section in accordance with the processed signal, and outputs the amplified power supply voltage. The apparatus includes output decrease prediction means for predicting decrease of the output signal on the basis of an amplitude of the input signal; power supply voltage correction signal generation means for generating a power supply voltage correction signal for correcting the power supply voltage of the power source section on the basis of the predicted decrease of the output signal; and feedforward control means for performing feedforward control of the power supply voltage of the power source section by using the power supply voltage correction signal.
摘要翻译： 一种信号放大装置，其向信号处理部提供输入信号以对输入信号进行信号处理，根据处理的信号放大从电源部提供的电源电压，并输出放大的电源电压。 该装置包括：输出减少预测装置，用于根据输入信号的幅度预测输出信号的减小; 电源电压校正信号产生装置，用于根据预测的输出信号的减小产生用于校正电源部分的电源电压的电源电压校正信号; 以及前馈控制装置，用于通过使用电源电压校正信号来执行对电源部分的电源电压的前馈控制。
-
公开(公告)号：US07209002B2
公开(公告)日：2007-04-24
申请号：US10536999
申请日：2003-12-12
申请人： Kazunobu Ohkuri , Toshihiko Masuda
发明人： Kazunobu Ohkuri , Toshihiko Masuda
IPC分类号： H03F3/38
CPC分类号： H03F3/2175 , H03F3/181 , H03F2200/331 , H03G3/34 , H03M3/328 , H03M3/346 , H03M3/506
摘要： In an audio amplifier having a D-class power amplifier, a noise upon muting is suppressed. A sampling rate converter circuit for sampling rate converting a digital audio signal into a digital audio signal, and a ΔΣ modulation circuit for re-quantizing the digital audio signal into a bit-reduced digital audio signal are provided. Further, a PWM modulation circuit for converting the digital audio signal into a PWM signal, and a D-class power amplifier to which the PWM signal are supplied. Still further, a dither signal forming circuit for superimposing a dither signal SDI on the digital audio signal, and a forming circuit for forming a muting signal SDET are provided. Upon muting, an input side of the sampling rate converter circuit is stopped by the muting signal SDET.
摘要翻译： 在具有D级功率放大器的音频放大器中，抑制静音时的噪声。 提供了一种用于将数字音频信号转换为数字音频信号的采样率的采样率转换器电路和用于将数字音频信号重新量化为比特减小数字音频信号的DeltaSigma调制电路。 此外，用于将数字音频信号转换为PWM信号的PWM调制电路以及供给PWM信号的D级功率放大器。 此外，还提供了一种用于将抖动信号SDI叠加在数字音频信号上的抖动信号形成电路和用于形成静噪信号SDET的形成电路。 在静音时，采样率转换器电路的输入侧由静噪信号SDET停止。
-
公开(公告)号：US06812785B2
公开(公告)日：2004-11-02
申请号：US10210769
申请日：2002-08-01
申请人： Toshihiko Masuda , Takashi Shima
发明人： Toshihiko Masuda , Takashi Shima
IPC分类号： H03F338
CPC分类号： H03F3/2173 , H03F3/2171 , H03F2200/331
摘要： A digital power amplifier includes a pulse width modulator for converting an input signal into a pulse width modulated signal according to a signal level of the input signal; an output stage, switching thereof being controlled by the pulse width modulated signal generated by the pulse width modulator; a pulse width modulation ratio detector for detecting a pulse width modulation ratio of the pulse width modulated signal generated by the pulse width modulator; and a control unit for disabling the switching operation of the output stage. The control unit disables the switching operation of the output stage when the pulse width modulation ratio detector detects that the pulse width modulation ratio is 50%.
摘要翻译： 数字功率放大器包括：脉冲宽度调制器，用于根据输入信号的信号电平将输入信号转换成脉宽调制信号; 输出级，其开关由脉冲宽度调制器产生的脉宽调制信号控制; 脉冲宽度调制率检测器，用于检测由脉冲宽度调制器产生的脉宽调制信号的脉宽调制比; 以及用于禁止输出级的切换操作的控制单元。 当脉宽调制率检测器检测到脉宽调制率为50％时，控制单元禁止输出级的切换操作。
-
公开(公告)号：US5230636A
公开(公告)日：1993-07-27
申请号：US980337
申请日：1992-11-23
IPC分类号： H01R13/46 , H01R13/52 , H01R13/627 , H01R13/631
CPC分类号： H01R13/6272 , H01R13/631 , H01R12/79
摘要： In a terminal protection type connector in which a flexible locking arm for locking a female connector housing is provided on a male connector housing, and the elastic contacts of terminals accommodated in the male connector housing are exposed through openings formed in the latter, a terminal protecting member is slidably mounted on the male connector housing in such a manner that said terminal protecting member covers the openings and engages with the flexible locking arm.
摘要翻译： 在一个端子保护型连接器中，其中用于锁定阴连接器壳体的柔性锁定臂设置在阳连接器壳体上，并且容纳在阳连接器壳体中的端子的弹性触点通过在其中形成的开口露出，端子保护 构件以这样的方式可滑动地安装在阳连接器壳体上，使得所述端子保护构件覆盖开口并与柔性锁定臂接合。
-
5.发明申请Digital amplifier apparatus and method of resetting a digital amplifier apparatus 有权数字放大器装置和数字放大器装置的复位方法公开(公告)号：US20070188221A1
公开(公告)日：2007-08-16
申请号：US11645208
申请日：2006-12-22
IPC分类号： H03F3/38
CPC分类号： H03F3/2173
摘要： A digital amplifier apparatus includes a gain-adjusting section operable to adjust a gain of a digital audio signal; a dither-superposing section operable to superpose a predetermined dither on the digital audio signal; a pulse-width-modulated signal generating section operable to generate a pulse-width-modulated signal corresponding to the digital audio signal; an amplifying section operable to cause a switching element to perform a switching operation in accordance with the pulse-width-modulated signal; a pulse-width changing section operable to change a ratio between a “high” state and a “low” state of the pulse-width modulated signal; a synchronizing section operable to synchronize the pulse-width modulated signal with a reset signal that resets the digital audio signal; and a control section operable to perform a resetting operation by setting the gain of the digital audio signal to a zero level upon receiving the reset signal, stopping the superposing of the dither to thereby generate the pulse-width modulated signal, and setting the pulse-width modulated signal to the “low” state by using the pulse-width modulated signal synchronized with the reset signal, thereby causing the switching element to stop performing the switching operation.
摘要翻译： 数字放大器装置包括可调节数字音频信号增益的增益调整部分; 抖动叠加部分，可操作以在数字音频信号上叠加预定的抖动; 脉冲宽度调制信号产生部分，用于产生对应于数字音频信号的脉冲宽度调制信号; 放大部分，其可操作以使开关元件根据所述脉冲宽度调制信号执行切换操作; 脉冲宽度改变部分，用于改变所述脉冲宽度调制信号的“高”状态和“低”状态之间的比率; 同步部分，其可操作以使所述脉冲宽度调制信号与复位所述数字音频信号的复位信号同步; 以及控制部，其可操作以通过在接收到所述复位信号时将所述数字音频信号的增益设定为零电平来执行复位操作，停止叠加所述抖动，从而生成所述脉冲宽度调制信号， 通过使用与复位信号同步的脉冲宽度调制信号将宽度调制信号变为“低”状态，从而使开关元件停止执行开关操作。
-
公开(公告)号：US20070133810A1
公开(公告)日：2007-06-14
申请号：US11557650
申请日：2006-11-08
申请人： Katsuhiro KISHI , Toshihiko Masuda
发明人： Katsuhiro KISHI , Toshihiko Masuda
IPC分类号： H04R5/00
CPC分类号： H04S7/301
摘要： A sound field correction apparatus that corrects a sound field characteristic by supplying a measurement signal used for measurement purposes to drive a plurality of speakers arranged at arbitrary positions to reproduce the measurement signal and receiving a collected sound signal obtained by collecting the sound reproduced from the plurality of speakers with a sound collector disposed at an arbitrary listening point is disclosed. The sound field correction apparatus includes: a measurement signal supplier, a receiver, a delay calculator, a sound pressure level difference calculator, a delay correction value calculator, and a gain correction value calculator.
摘要翻译： 一种声场校正装置，其通过提供用于测量目的的测量信号来校正声场特性，以驱动布置在任意位置的多个扬声器，以再现测量信号，并接收通过收集从多个再现的声音获得的收集的声音信号 具有设置在任意收听点处的收音机的扬声器被公开。 声场校正装置包括：测量信号提供器，接收器，延迟计算器，声压级差计算器，延迟校正值计算器和增益校正值计算器。
-
公开(公告)号：US06917242B2
公开(公告)日：2005-07-12
申请号：US10466927
申请日：2002-11-07
申请人： Toshihiko Masuda , Kazunobu Ohkuri
发明人： Toshihiko Masuda , Kazunobu Ohkuri
CPC分类号： H03F1/26 , H03F3/217 , H03F3/2173 , H03F3/3027 , H03F2200/331
摘要： A power amplifier for reducing emission generated at the edges of output voltages. A pair of PWM modulation circuits (11) and (12) to which an input signal is sent; a pair of push-pull circuits (15) and (16); and drive circuits (13) and (14) for sending the outputs of the PWM modulation circuits (11) and (12) as drive signals to the push-pull circuits (15) and (16) are provided. A speaker (19) is connected between the output end of the push-pull circuit (15) and the output end of the push-pull circuit (16). The drive circuits (13) and (14) are switched at intervals equal to the cycle period of pulse modulation signals such that the drive signals sent to the push-pull circuits (15) and (16) are not changed at the end points of each cycle period of the pulse modulation signals.
摘要翻译： 一种功率放大器，用于减少在输出电压边缘产生的发射。 一对输入信号被发送到的PWM调制电路（11）和（12） 一对推挽电路（15）和（16）; 并且提供用于将PWM调制电路（11）和（12）的输出作为驱动信号发送到推挽电路（15）和（16）的驱动电路（13）和（14）。 扬声器（19）连接在推挽电路（15）的输出端与推挽电路（16）的输出端之间。 驱动电路（13）和（14）以等于脉冲调制信号的周期的间隔进行切换，使得发送到推挽电路（15）和（16）的驱动信号在端点 每个周期的脉冲调制信号。
-
公开(公告)号：US06734725B2
公开(公告)日：2004-05-11
申请号：US10299580
申请日：2002-11-19
申请人： Toshihiko Masuda , Kazunobu Ohkuri
发明人： Toshihiko Masuda , Kazunobu Ohkuri
IPC分类号： H03F338
CPC分类号： H03F3/2173 , H03F3/3027 , H03F2200/331
摘要： A power amplifier circuit includes a pair of PWM circuits, to which an input signal is supplied, a pair of push-pull circuits, and drive circuits for supplying the outputs of the PWM circuits to the push-pull circuits as drive signals. A speaker is arranged between the output end of one push-pull circuit and the output end of the other push-pull circuit. The drive circuits alternately drive the respective push-pull circuits every cycle time of a PWM signal. The circuit can suppress radiation caused by the variation in output voltages.
摘要翻译： 功率放大器电路包括供给输入信号的一对PWM电路，一对推挽电路和用于将PWM电路的输出作为驱动信号提供给推挽电路的驱动电路。 扬声器布置在一个推挽电路的输出端和另一个推挽电路的输出端之间。 驱动电路在PWM信号的每周期时间交替地驱动相应的推挽电路。 电路可以抑制由输出电压变化引起的辐射。
-
公开(公告)号：US06388598B2
公开(公告)日：2002-05-14
申请号：US09911908
申请日：2001-07-24
申请人： Toshihiko Masuda
发明人： Toshihiko Masuda
IPC分类号： H03M106
CPC分类号： H03M1/0872 , H03K17/04113 , H03K17/6264 , H03M1/747
摘要： An object of this invention is to provide a D/A converter of a multibit type for improving its performance by reducing dispersion of the electric currents of plural electric current sources as much as possible. To achieve this object, the D/A converter has a constant electric current source (10) constructed by 2N (N=2, 3, - - - and here, N=16) constant electric current sources having constant electric current values equal to each other; selecting means (7, 8) for selecting Di constant electric current sources according to input data Di {here, Di=0, 1, 2, 3, - - - (2N−1)} having N-bits in input word length so as to use these 2N constant electric current sources one by one until a sum of values of one input data or continuous plural input data among these 2N constant electric current sources exceeds 2N; and electric current adding means (9) for adding each of the constant electric currents from the Di constant electric current sources selected by the selecting means to each other.
摘要翻译： 本发明的目的是提供一种用于通过尽可能减少多个电流源的电流的散射来提高其性能的多位型D / A转换器。 为了实现该目的，D / A转换器具有恒定的电流源（10），其由具有恒定电流值的2N（N = 2,3， - 和 - 这里为N = 16）恒定电流源构成， 彼此; 根据输入字长为N位的输入数据Di {这里，Di = 0,1,2,3， - - （2N-1）），选择Di恒定电流源的选择装置（7,8） 一直使用这2N个恒定电流源，直到这2N个恒定电流源中的一个输入数据或连续的多个输入数据的值的和超过2N; 以及用于将由选择装置选择的Di恒定电流源中的每个恒定电流彼此相加的电流添加装置（9）。
-
公开(公告)号：US5174785A
公开(公告)日：1992-12-29
申请号：US728504
申请日：1991-07-11
IPC分类号： H01R13/62 , H01R13/629
CPC分类号： H01R13/62955 , H01R12/724 , H01R13/62
摘要： A low insertion-withdrawal force electric connector is disclosed wherein a pin is mounted on one side wall of a male housing; a groove into and out of which said pin is movable is provided in a hood of a female housing; a cam lever is pivotally mounted on said hood; and the cam lever has at its front end an eccentric cam groove which is engageable with the pin so as to cause said two housings to be fitted and disengaged relative to each other in response to the pivotal movement of said lever. A fitting-side acting surface of the eccentric cam groove against the pin is disposed generally perpendicular to the direction of advance of said pin when the two housings are completely fitted together.
摘要翻译： 公开了一种低插拔力电连接器，其中销安装在阳壳体的一个侧壁上; 所述销可移动的凹槽设置在阴壳体的罩中; 枢轴安装在所述罩上的凸轮杆; 并且所述凸轮杆在其前端具有与所述销接合的偏心凸轮槽，以便响应于所述杆的枢转运动而使所述两个壳体相对于彼此装配和分离。 当两个壳体完全装配在一起时，偏心凸轮槽的装配侧作用表面大致垂直于所述销的前进方向。
-
-
-
-
-
-
-
-
-
搜索结果
36 条记录 (耗时 0.018 秒)