公开(公告)号：US4700060A

公开(公告)日：1987-10-13

申请号：US843975

申请日：1986-03-25

申请人： Michael N. Laiacona ,  William Thompson ,  Carl L. Cornell

发明人： Michael N. Laiacona ,  William Thompson ,  Carl L. Cornell

IPC分类号： H01H9/54 ,  H03K17/78 ,  G02B27/00 ,  H01H35/00

CPC分类号： H01H9/547 ,  H03K17/78 ,  Y10T307/773

摘要： The device includes an audio signal circuit having two separate terminals that are connected through the photoresistor elements of two, separate, optical isolators with an audio signal input/output terminal, so that signals can be routed selectively and bidirectionally along separate signal paths to or from the input/output terminal to one or both of the two separate terminals. A separate control circuit supplies DC power selectively to the LED's which control the selective energization of the photoresistor elements of the optical isolators, the advantage being that the photoresistive devices permit selective blocking of the audio signal paths without physically opening or interrupting the paths and thus avoiding objectionable signal spikes and consequent loud popping sounds in associated loud speaker systems. The DC control circuit includes two, manually operable double pole, double throw switches for controlling the selective routing of signals between the audio signal terminals.

摘要翻译： 该装置包括具有两个独立端子的音频信号电路，两个独立的端子通过具有音频信号输入/输出端子的两个独立的光隔离器的光敏电阻元件连接，使得信号可以沿着分离的信号路径选择性地和双向地路由到或从 输入/输出端子连接到两个分离端子中的一个或两个。 单独的控制电路选择性地向控制光隔离器的光敏电阻元件的选择性激励的LED提供DC电力，其优点在于，光致抗蚀器件允许选择性地阻塞音频信号路径，而不会物理地打开或中断路径，从而避免 相关的扬声器系统中有令人反感的信号尖峰和随之而来的大声爆音。 直流控制电路包括两个可手动操作的双极双掷开关，用于控制音频信号端子之间信号的选择性路由选择。