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    • 5. 发明授权
    • Radio-frequency receiver
    • 射频接收机
    • US07418247B2
    • 2008-08-26
    • US11626904
    • 2007-01-25
    • Sanae AsayamaKoji NakatsujiMasanori SuzukiAtsuhito Terao
    • Sanae AsayamaKoji NakatsujiMasanori SuzukiAtsuhito Terao
    • H04B7/00H04B1/18
    • H04B1/406H03J3/08H03J5/244H04B1/28
    • A radio-frequency (RF) receiver includes an input terminal for receiving RF signals in a first frequency band and a second frequency band lower than the first frequency band, a first tuned filter allowing a signal of a passing frequency in the RF signal in the first frequency band to pass through the filter, a local oscillator, a frequency divider for frequency-dividing a signal output from the local oscillator, a first mixer operable to convert the signal output from the first tuned filter into a signal of an intermediate frequency, a second tuned filter allowing a signal of a passing frequency of the RF signal in the second frequency band to pass through the filter, a second mixer operable to convert the signal output from the second tuned filter into a signal of the intermediate frequency, and a phase-locked-loop (PLL) circuit operable to control an oscillation frequency of the local oscillator and the passing frequencies of the first tuned filter and the second tuned filter.
    • 射频(RF)接收机包括用于接收第一频带中的RF信号的输入端和低于第一频带的第二频带的第一调谐滤波器,其允许RF信号中的通过频率的信号 第一频带通过滤波器,本地振荡器,用于对从本地振荡器输出的信号进行分频的分频器,可操作以将从第一调谐滤波器输出的信号转换为中频信号的第一混频器, 允许第二频带中的RF信号的通过频率的信号通过滤波器的第二调谐滤波器,可操作以将从第二调谐滤波器输出的信号转换成中频信号的第二混频器,以及 锁相环(PLL)电路,其可操作以控制本地振荡器的振荡频率和第一调谐滤波器和第二调谐滤波器的通过频率。
    • 6. 发明申请
    • RADIO-FREQUENCY RECEIVER
    • 无线电频率接收机
    • US20070123186A1
    • 2007-05-31
    • US11626904
    • 2007-01-25
    • Sanae AsayamaKoji NakatsujiMasanori SuzukiAtsuhito Terao
    • Sanae AsayamaKoji NakatsujiMasanori SuzukiAtsuhito Terao
    • H04B7/08H04B1/18
    • H04B1/406H03J3/08H03J5/244H04B1/28
    • A radio-frequency (RF) receiver includes an input terminal for receiving RF signals in a first frequency band and a second frequency band lower than the first frequency band, a first tuned filter allowing a signal of a passing frequency in the RF signal in the first frequency band to pass through the filter, a local oscillator, a frequency divider for frequency-dividing a signal output from the local oscillator, a first mixer operable to convert the signal output from the first tuned filter into a signal of an intermediate frequency, a second tuned filter allowing a signal of a passing frequency of the RF signal in the second frequency band to pass through the filter, a second mixer operable to convert the signal output from the second tuned filter into a signal of the intermediate frequency, and a phase-locked-loop (PLL) circuit operable to control an oscillation frequency of the local oscillator and the passing frequencies of the first tuned filter and the second tuned filter.
    • 射频(RF)接收机包括用于接收第一频带中的RF信号的输入端和低于第一频带的第二频带的第一调谐滤波器,其允许RF信号中的通过频率的信号 第一频带通过滤波器,本地振荡器,用于对从本地振荡器输出的信号进行分频的分频器,可操作以将从第一调谐滤波器输出的信号转换为中频信号的第一混频器, 允许第二频带中的RF信号的通过频率的信号通过滤波器的第二调谐滤波器,可操作以将从第二调谐滤波器输出的信号转换成中频信号的第二混频器,以及 锁相环(PLL)电路,其可操作以控制本地振荡器的振荡频率和第一调谐滤波器和第二调谐滤波器的通过频率。
    • 7. 发明授权
    • Radio-frequency receiver and integrated circuit for use in receiver
    • 射频接收机和用于接收机的集成电路
    • US07215938B2
    • 2007-05-08
    • US10962850
    • 2004-10-12
    • Sanae AsayamaKoji NakatsujiMasanori SuzukiAtsuhito Terao
    • Sanae AsayamaKoji NakatsujiMasanori SuzukiAtsuhito Terao
    • H04B1/18H04B7/00H04B1/28
    • H04B1/406H03J3/08H03J5/244H04B1/28
    • A radio-frequency (RF) receiver includes an input terminal for receiving RF signals in a first frequency band and a second frequency band lower than the first frequency band, a first tuned filter allowing a signal of a passing frequency in the RF signal in the first frequency band to pass through the filter, a local oscillator, a frequency divider for frequency-dividing a signal output from the local oscillator, a first mixer operable to convert the signal output from the first tuned filter into a signal of an intermediate frequency, a second tuned filter allowing a signal of a passing frequency of the RF signal in the second frequency band to pass through the filter, a second mixer operable to convert the signal output from the second tuned filter into a signal of the intermediate frequency, and a phase-locked-loop (PLL) circuit operable to control an oscillation frequency of the local oscillator and the passing frequencies of the first tuned filter and the second tuned filter.
    • 射频(RF)接收机包括用于接收第一频带中的RF信号的输入端和低于第一频带的第二频带的第一调谐滤波器,其允许RF信号中的通过频率的信号 第一频带通过滤波器,本地振荡器,用于对从本地振荡器输出的信号进行分频的分频器,可操作以将从第一调谐滤波器输出的信号转换为中频信号的第一混频器, 允许第二频带中的RF信号的通过频率的信号通过滤波器的第二调谐滤波器,可操作以将从第二调谐滤波器输出的信号转换成中频信号的第二混频器,以及 锁相环(PLL)电路,其可操作以控制本地振荡器的振荡频率和第一调谐滤波器和第二调谐滤波器的通过频率。