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    • 2. 发明授权
    • Intermediate frequency filter having variable pass band
    • 具有可变通带的中频滤波器
    • US08358183B2
    • 2013-01-22
    • US12622381
    • 2009-11-19
    • Kyo Sang LeeEun Young Shin
    • Kyo Sang LeeEun Young Shin
    • H03H7/00
    • H04N5/455H03J5/244H04B1/1027
    • Disclosed herein is an intermediate frequency filter having a variable pass band, which is capable of varying a pass band to minimize loss at a plurality of intermediate frequencies? The intermediate frequency (IF) includes a band pass filter unit arranged between a frequency conversion IC and a demodulation unit and configured to filter an IF signal output from the frequency conversion IC and output a resulting signal. A band varying unit is connected to the band pass filter unit and is configured to vary a pass band of the band pass filter unit. A switching unit connects or disconnects the band varying unit to or from the band pass filter unit. A control unit detects the IF signal and controls the switching unit in response to the IF signal so that the band varying unit is connected to or disconnected from the band pass filter unit.
    • 这里公开了一种具有可变通带的中频滤波器,其能够改变通带以最小化多个中间频率处的损耗? 中频(IF)包括频带滤波器单元,其布置在频率转换IC和解调单元之间,并且被配置为对从频率转换IC输出的IF信号进行滤波并输出结果信号。 频带改变单元连接到带通滤波器单元,并且被配置为改变带通滤波器单元的通带。 开关单元将频带改变单元连接到带通滤波器单元或从带通滤波器单元断开。 控制单元检测IF信号并且响应于IF信号控制开关单元,使得频带改变单元连接到带通滤波器单元或从带通滤波器单元断开。
    • 3. 发明申请
    • Intermediate Frequency Filter having Variable Pass Band
    • 具有可变通带的中频滤波器
    • US20110074522A1
    • 2011-03-31
    • US12622381
    • 2009-11-19
    • Kyo Sang LEEEun Young Shin
    • Kyo Sang LEEEun Young Shin
    • H03H7/12
    • H04N5/455H03J5/244H04B1/1027
    • Disclosed herein is an intermediate frequency filter having a variable pass band, which is capable of varying a pass band to minimize loss at a plurality of intermediate frequencies.The intermediate frequency (IF) includes a band pass filter unit arranged between a frequency conversion IC and a demodulation unit and configured to filter an IF signal output from the frequency conversion IC and output a resulting signal. A band varying unit is connected to the band pass filter unit and is configured to vary a pass band of the band pass filter unit. A switching unit connects or disconnects the band varying unit to or from the band pass filter unit. A control unit detects the IF signal and controls the switching unit in response to the IF signal so that the band varying unit is connected to or disconnected from the band pass filter unit.
    • 这里公开了具有可变通带的中频滤波器,其能够改变通带以使多个中间频率处的损耗最小化。 中频(IF)包括频带滤波器单元,其布置在频率转换IC和解调单元之间,并且被配置为对从频率转换IC输出的IF信号进行滤波并输出结果信号。 频带改变单元连接到带通滤波器单元,并且被配置为改变带通滤波器单元的通带。 开关单元将频带改变单元连接到带通滤波器单元或从带通滤波器单元断开。 控制单元检测IF信号并且响应于IF信号控制开关单元,使得频带改变单元连接到带通滤波器单元或从带通滤波器单元断开。