专利名称：Switching signal generator发明人：Masaki Akiyama,Okie Tani申请号：US05/751332申请日：19761216公开号：US04103105A公开日：19780725
摘要：In a press-to-talk system of radio telephone communication, the operator'sparticular voice signal actuates a switching signal generator to generate a transmit-receive circuit changing signal which connects the circuit of the radio telephone
equipment for transmission or for standby. A characteristic tone signal is also generatedfor each switching changeover of the radio equipment to inform the operator of theswitching changeover of the equipment. The press-to-talk manual switch and the pilotlamp for indicating the state of the circuit connection are eliminated, and the operatorcan use his hands and eyes for other operations while he is using his radio telephoneequipment. A feature of the invention is the use of two different frequency tones toindicate equipment mode or logic status by indicating the direction of logic-state change.
申请人：TANI DENKI KOGYO KABUSHIKI KAISHA
代理机构：Haseltine, Lake & Waters
更多信息请下载全文后查看
因篇幅问题不能全部显示，请点此查看更多更全内容