Switching signal generator

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

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