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    • 4. 发明申请
    • SWITCH CIRCUIT AND METHOD THEREFOR
    • 切换电路及其方法
    • WO1994022531A1
    • 1994-10-13
    • PCT/US1994002896
    • 1994-03-18
    • MOTOROLA INC.
    • MOTOROLA INC.AGAHI-KESHEH, DarioushHUANG, Rong-FongKOMMRUSCH, Richard, Stephen
    • A61N01/36
    • H04B1/48
    • A switch circuit for a cellular radiotelephone operable in a TDMA communication scheme. The switch circuit (206) is disposed upon a plurality of tandemly-positioned ceramic substrates having transmission lines (250) disposed upon one of the ceramic substrates. The switch circuit alternately connects transmitter circuitry (212) to an antenna (218) or receiver circuitry (224) to the antenna (218), thereby alternately to permit transmission or reception of signals generated by, or received by the radiotelephone. Because circuits disposed upon ceramic materials are of low insertion losses, the switch circuit (206) is advantageously utilized to form a portion of the radiotelephone.
    • 一种用于以TDMA通信方式工作的蜂窝无线电话机的开关电路。 开关电路(206)设置在具有设置在陶瓷基板之一上的传输线(250)的多个串联定位的陶瓷基板上。 开关电路将发射机电路(212)交替地连接到天线(218)或接收机电路(224)到天线(218),从而交替地允许发射或接收由无线电话机产生或由无线电话机接收的信号。 由于设置在陶瓷材料上的电路具有低插入损耗,所以开关电路(206)有利地用于形成无线电话机的一部分。