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    • 3. 发明授权
    • Squelch circuit and communication apparatus used with the same
    • 静噪电路和通讯装置一并使用
    • US07489915B2
    • 2009-02-10
    • US11290487
    • 2005-12-01
    • Tadaoki YamamotoAkira MatsuuraKoji Takayama
    • Tadaoki YamamotoAkira MatsuuraKoji Takayama
    • H04B1/10
    • H04B1/10H03G3/344
    • A squelch circuit and a communication apparatus used with the same that are able to generate a squelch signal even if a squelch period is short and an operation of a squelch detecting circuit is insufficient, the circuit having: a squelch detecting circuit detecting the existence of a signal on a communication line in response to a transmission signal or a received signal and generating a first squelch signal; and a squelch control circuit generating a squelch mask signal in response to the first squelch signal and a transmission control signal and generating a second squelch signal based on the squelch mask signal and the control signal. The first squelch signal is controlled by the transmission signal to generate the second squelch signal in which the lacked portion of the first squelch signal is temporally restructured.
    • 即使静噪时间短,静噪检测电路的动作不足也能够产生静噪信号的静噪电路和通信装置,具有:静噪检测电路,检测出 响应于传输信号或接收到的信号在通信线路上产生信号并产生第一静噪信号; 以及静噪控制电路,响应于所述第一静噪信号和发送控制信号产生静噪屏蔽信号,并且基于所述静噪屏蔽信号和所述控制信号产生第二静噪信号。 第一静噪信号由发送信号控制,以产生其中第一静噪信号的缺少部分在时间上重构的第二静噪信号。
    • 5. 发明申请
    • Squelch circuit and communication apparatus used with the same
    • 静噪电路和通讯装置一并使用
    • US20060121866A1
    • 2006-06-08
    • US11290487
    • 2005-12-01
    • Tadaoki YamamotoAkira MatsuuraKoji Takayama
    • Tadaoki YamamotoAkira MatsuuraKoji Takayama
    • H04B1/10
    • H04B1/10H03G3/344
    • A squelch circuit and a communication apparatus used with the same able to generate a squelch signal even if a squelch period is short and an operation of a squelch detecting circuit is insufficient, the circuit having: a squelch detecting circuit detecting an existence of a signal on a communication line in response to a transmission signal or a received signal, and generating a first squelch signal; and a squelch control circuit generating a squelch mask signal in response to the first squelch signal and a transmission control signal, and generating a second squelch signal based on the squelch mask signal and the control signal. The first squelch signal is controlled by the transmission signal to generate the second squelch signal in which the lacked portion of the first squelch signal is temporally restructured.
    • 静噪电路和通信装置能够产生静噪信号,即使静噪时间短,静噪检测电路的动作不充分,该电路具有:静噪检测电路检测信号的存在 响应于发送信号或接收信号的通信线路,并产生第一静噪信号; 以及静噪控制电路,响应于第一静噪信号和发送控制信号产生静噪屏蔽信号,并且基于静噪屏蔽信号和控制信号产生第二静噪信号。 第一静噪信号由发送信号控制,以产生其中第一静噪信号的缺少部分在时间上重构的第二静噪信号。