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11. 发明申请

US20070123186A1 RADIO-FREQUENCY RECEIVER 失效
标题翻译：无线电频率接收机
公开(公告)号：US20070123186A1
公开(公告)日：2007-05-31
申请号：US11626904
申请日：2007-01-25
申请人： Sanae Asayama , Koji Nakatsuji , Masanori Suzuki , Atsuhito Terao
发明人： Sanae Asayama , Koji Nakatsuji , Masanori Suzuki , Atsuhito Terao
IPC分类号： H04B7/08 , H04B1/18
CPC分类号： H04B1/406 , H03J3/08 , H03J5/244 , H04B1/28
摘要： 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.
摘要翻译：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。

12. 发明授权

US07215938B2 Radio-frequency receiver and integrated circuit for use in receiver 失效
标题翻译：射频接收机和用于接收机的集成电路
公开(公告)号：US07215938B2
公开(公告)日：2007-05-08
申请号：US10962850
申请日：2004-10-12
申请人： Sanae Asayama , Koji Nakatsuji , Masanori Suzuki , Atsuhito Terao
发明人： Sanae Asayama , Koji Nakatsuji , Masanori Suzuki , Atsuhito Terao
IPC分类号： H04B1/18 , H04B7/00 , H04B1/28
CPC分类号： H04B1/406 , H03J3/08 , H03J5/244 , H04B1/28
摘要： 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.
摘要翻译：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。

13. 发明申请

US20060046678A1 High-frequency receiver and portable device using the same 失效
标题翻译：高频接收机和便携式设备使用相同
公开(公告)号：US20060046678A1
公开(公告)日：2006-03-02
申请号：US11203133
申请日：2005-08-15
申请人： Masaaki Noda , Atsuhito Terao , Sanae Asayama
发明人： Masaaki Noda , Atsuhito Terao , Sanae Asayama
IPC分类号： H04B1/18 , H04B1/10
CPC分类号： H03D7/18 , H03D7/14 , H04B1/109 , H04B1/28
摘要： A high-frequency receiver and a portable device using the same receiver are proposed for reducing power consumption. Image interference determiner (44) determines whether or not image interference exists at the present position in a desirable channel to be received, which channel is obtained by a receiving section (39) or a GPS receiver (43). Power supply control circuit (47) switches mixer (49) from an image rejection mixer to a double balance mixer when determiner (44) determines no image interference involves. This mechanism allows mixer (49) to work as the double balance mixer circuit during the reception of channels free from image interference, so that a mixer consuming less power is achievable. When mixer (49) works as the image rejection mixer circuit, image interference can be reduced.
摘要翻译：提出了一种高频接收机和使用相同接收机的便携式设备，用于降低功耗。图像干扰确定器（44）确定在要接收的期望信道中的当前位置是否存在图像干扰，哪个信道由接收部分（39）或GPS接收机（43）获得。当确定器（44）确定不涉及图像干扰时，电源控制电路（47）将混频器（49）从镜像抑制混频器切换到双重平衡混频器。这种机制允许混合器（49）在接收没有图像干扰的通道期间用作双重平衡混频器电路，使得可以实现消耗较少功率的混频器。当混频器（49）用作镜像抑制混频器电路时，可以降低图像干扰。

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