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    • 7. 发明专利
    • Variable gain amplifier
    • 可变增益放大器
    • JPS58200611A
    • 1983-11-22
    • JP8312682
    • 1982-05-19
    • Hitachi Ltd
    • KOBAYASHI TERUO
    • H03G3/02H03G3/04
    • H03G3/04
    • PURPOSE:To set the gain freely and simply, by providing plural operating circuits multiplying a certain coefficient with an output signal, synthesizing the outputs of a selected operating circuit and feeding back the synthesized result to an input. CONSTITUTION:An output VO of an operational amplifier 3 to which an input signal Vi is applied, is supplied to operating circuits K1-Kn multiplying coefficients k1-kn via switches S1-Sn. Further, the output of each operating circuit is summed at an adder M and applied to an input of the amplifier 3 as a feedback signal Vf. The gain G of this circuit is G=VO/vi=1/(k1+k2+...+kn). Thus, the setting of the gain G is done by selecting the coefficients k1-kn with the plural switches S1-Sn. The switches S1-Sn are switched with an external signal in this way, allowing to set the gain freely and simply.
    • 目的:通过提供将一定系数与输出信号相乘的多个操作电路,可以自由设置增益,合成所选择的操作电路的输出并将合成结果反馈给输入。 构成:施加有输入信号Vi的运算放大器3的输出VO经由开关S1-Sn向运算电路K1-Kn乘以系数k1-kn。 此外,每个操作电路的输出在加法器M相加,并作为反馈信号Vf加到放大器3的输入端。 该电路的增益G为G = VO / vi = 1 /(k1 + k2 + ... + kn)。 因此,通过用多个开关S1-Sn选择系数k1-kn来完成增益G的设定。 开关S1-Sn以这种方式用外部信号切换,允许自由地简单地设置增益。
    • 9. 发明专利
    • Volume control system
    • 体积控制系统
    • JP2011199826A
    • 2011-10-06
    • JP2010155141
    • 2010-07-07
    • Onkyo Corpオンキヨー株式会社
    • YAMADA TAKASHIOTSU KAZUSHIGE
    • H03G3/02H03G1/00H04R3/00
    • H03G3/04G06F3/165H03G3/002
    • PROBLEM TO BE SOLVED: To properly change the volume value of an amplifying apparatus in accordance with a variation in a controller side volume value when the controller side volume value is changed.SOLUTION: When an amplifier side volume value is input by a user's operation, an AV amplifier controls the volume value of an amplifying apparatus, converts the amplifier side volume value into a controller side volume value, and transmits the controller side volume value to a controller. The controller, on receiving the controller side volume value, moves a slide bar. Alternatively, the controller, when the controller side volume value is input by a user's operation, moves the slide bar, and transmits the controller side volume value to the AV amplifier. The AV amplifier, on receiving the controller side volume value, converts the controller side volume value into the amplifier side volume value, and controls the volume value of the amplifying apparatus on the basis of the amplifier side volume value.
    • 要解决的问题:当控制器侧体积值改变时,根据控制器侧体积值的变化来适当地改变放大装置的体积值。解决方案:当通过用户的操作输入放大器侧体积值时, AV放大器控制放大装置的体积值,将放大器侧体积值转换为控制器侧体积值,并将控制器侧体积值发送到控制器。 控制器在接收到控制器侧的音量值时,移动滑杆。 或者,当通过用户操作输入控制器侧体积值时,控制器移动滑杆,并将控制器侧体积值发送到AV放大器。 AV放大器在接收到控制器侧音量值时,将控制器侧的音量值转换为放大器侧的音量值,并根据放大器侧的音量值来控制放大装置的音量。