METHOD TO APPLY AND DISCONNECT A 16KHZ SIGNAL TO A TELEPHONE WITHOUT PRODUCING CLICKS,申请号CA19770272091-传众专利搜索

METHOD TO APPLY AND DISCONNECT A 16KHZ SIGNAL TO A TELEPHONE WITHOUT PRODUCING CLICKS

申请公布号：CA1056526(A)

申请号：CA19770272091

申请日期：1977.02.18

申请公布日期：1979.06.12

申请人：

GTE AUTOMATIC ELECTRIC LABORATORIES INCORPORATED

发明人：WEBER, VERNON F.

分类号：H04M15/00;(IPC1-7):04M3/22;04Q1/44;04M15/12

主分类号：H04M15/00

摘要：<p>A tone generator which is always connected across a line and which can gradually increase or decrease its output amplitude. This is accomplished by the use of a tickler winding type of oscillator with a resonant frequency determining network connected to one winding. The frequency determining network is arranged with a high resistance shunt that is further shunted when the tone is to be removed.</p>