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1. 发明授权

US5008634A System for controlling the dynamic range of electric musical instruments 失效
标题翻译：用于控制电动乐器动态范围的系统
公开(公告)号：US5008634A
公开(公告)日：1991-04-16
申请号：US417789
申请日：1989-10-04
申请人： David E. Christian
发明人： David E. Christian
IPC分类号： H03G7/00 , H03G7/08
CPC分类号： H03G7/08 , H03G7/004
摘要： A system is provided for use with an electrical musical instrument for conditioning electrical signals generated by the instrument. The system includes an amplifier circuit having an input for responding to the signals and an output to provide a conditioned output signal. At least one compressor is operatively connected to the input for responding to the amplitude of the signals to provide a compressed signal to the amplifier circuit that is variable as a nonlinear function of the amplitude. Also provided are a pair of bandpass filters in parallel for frequency preemphasis of the compressed signal. Also provided is time modulation circuitry for permitted certain musical sound effects.
摘要翻译：提供了一种用于与用于调节由仪器产生的电信号的电气乐器一起使用的系统。该系统包括具有用于响应信号的输入的放大器电路和用于提供经调节的输出信号的输出。至少一个压缩器可操作地连接到输入端，以响应于信号的幅度，以将可压缩的信号提供给放大器电路，该放大器电路可以作为幅度的非线性函数而变化。还提供了一对并行的带通滤波器用于压缩信号的频率预加重。还提供了用于允许某些音乐声音效果的时间调制电路。

2. 发明授权

US5018204A Portable musical instrument amplifier 失效
标题翻译：便携式乐器放大器
公开(公告)号：US5018204A
公开(公告)日：1991-05-21
申请号：US505459
申请日：1990-04-06
申请人： David E. Christian
发明人： David E. Christian
IPC分类号： G10H1/32 , G10H3/18
CPC分类号： G10H1/32 , G10H3/18
摘要： The present invention relates to a musical instrument amplifier which is particularly useful for electric guitars. The amplifier has a rigid body for housing both the electronic system for amplifying and processing signals from the guitar and the system's power supply. An input plug connected to and projecting from the body is electrically coupled to the signal amplifying and processing system. When the plug is inserted into an output jack for an electric guitar, the body is rigidly carried by the guitar, and the guitar is operatively connected to the electrical amplifying and signal processing system without use of a loose interconnection cable. The amplifier is provided with an output jack, into which headphones are plugged to receive amplified signals from the guitar. By eliminating the conventional interconnection cable, the amplifier of the present invention can be used by musicians with increased flexibility and greater freedom of movement.
摘要翻译：本发明涉及一种对电吉他特别有用的乐器放大器。放大器具有用于容纳用于放大和处理来自吉他和系统电源的信号的电子系统的刚体。连接到主体并从主体突出的输入插头电耦合到信号放大和处理系统。当插头插入电吉他的输出插孔时，身体由吉他刚性地携带，吉他可操作地连接到电放大和信号处理系统，而不使用松散的互连电缆。该放大器配有一个输出插孔，耳机插入耳机以接收来自吉他的放大信号。通过消除常规互连电缆，本发明的放大器可以由具有更大灵活性和更大的移动自由度的音乐家使用。

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