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1.发明授权Signal processing semiconductor integrated circuit device and wireless communication system 有权信号处理半导体集成电路器件和无线通信系统公开(公告)号：US07359678B2
公开(公告)日：2008-04-15
申请号：US11111934
申请日：2005-04-22
IPC分类号： H04B1/40
CPC分类号： H04B1/30 , H03D7/1433 , H03D7/1458 , H03D2200/0033 , H03D2200/0047 , H03D2200/009
摘要： The invention provides a signal processing semiconductor integrated circuit of the direct conversion system, which includes a dummy amplifier having the same circuit configuration as a low noise amplifier being the first stage amplifier, in which the DC offset calibrations on the subsequent stage amplifiers are carried out during shifting into the reception mode in a state that the low noise amplifier is deactivated and the dummy amplifier is activated. Thereby, the invention achieves to suppress generation of the DC offsets resulting from the leakage noises of the local oscillator during shifting into the reception mode, and to enhance the reception sensitivity.
摘要翻译： 本发明提供一种直接转换系统的信号处理半导体集成电路，其包括具有与作为第一级放大器的低噪声放大器相同的电路结构的虚拟放大器，其中在后级放大器上进行DC偏移校准 在低噪声放大器被去激活并且虚拟放大器被激活的状态下转换到接收模式期间。 由此，本发明实现了抑制在变换为接收模式时本地振荡器的泄漏噪声产生的DC偏移的产生，并提高了接收灵敏度。
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2.发明申请Signal processing semiconductor integrated circuit device and wireless communication system 有权信号处理半导体集成电路器件和无线通信系统公开(公告)号：US20050186927A1
公开(公告)日：2005-08-25
申请号：US11111934
申请日：2005-04-22
CPC分类号： H04B1/30 , H03D7/1433 , H03D7/1458 , H03D2200/0033 , H03D2200/0047 , H03D2200/009
摘要： The invention provides a signal processing semiconductor integrated circuit of the direct conversion system, which includes a dummy amplifier having the same circuit configuration as a low noise amplifier being the first stage amplifier, in which the DC offset calibrations on the subsequent stage amplifiers are carried out during shifting into the reception mode in a state that the low noise amplifier is deactivated and the dummy amplifier is activated. Thereby, the invention achieves to suppress generation of the DC offsets resulting from the leakage noises of the local oscillator during shifting into the reception mode, and to enhance the reception sensitivity.
摘要翻译： 本发明提供一种直接转换系统的信号处理半导体集成电路，其包括具有与作为第一级放大器的低噪声放大器相同的电路结构的虚拟放大器，其中在后级放大器上进行DC偏移校准 在低噪声放大器被去激活并且虚拟放大器被激活的状态下转换到接收模式期间。 由此，本发明实现了抑制在变换为接收模式时本地振荡器的泄漏噪声产生的DC偏移的产生，并提高了接收灵敏度。
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3.发明授权公开(公告)号：US06909882B2
公开(公告)日：2005-06-21
申请号：US10033793
申请日：2002-01-03
IPC分类号： H03D7/14 , H04B1/30 , H04B1/3822 , H04B1/40
CPC分类号： H04B1/30 , H03D7/1433 , H03D7/1458 , H03D2200/0033 , H03D2200/0047 , H03D2200/009
摘要： The invention provides a signal processing semiconductor integrated circuit of the direct conversion system, which includes a dummy amplifier having the same circuit configuration as a low noise amplifier being the first stage amplifier, in which the DC offset calibrations on the subsequent stage amplifiers are carried out during shifting into the reception mode in a state that the low noise amplifier is deactivated and the dummy amplifier is activated. Thereby, the invention achieves to suppress generation of the DC offsets resulting from the leakage noises of the local oscillator during shifting into the reception mode, and to enhance the reception sensitivity.
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