专利名称：Direct conversion receiver发明人：Sachiko Tanaka申请号：US10921523申请日：20040819
公开号：US20050020230A1公开日：20050127
专利附图：
摘要：A direct conversion receiver is disclosed wherein a received RF signal is mixed ina mixer with a local oscillation signal having a frequency the same as a desired centralfrequency, and is down-converted to a base band signal. The receiver comprises a dividerfor dividing the received RF signal; an adder provided at a received RF signal input side of
the mixer; a phase shifter provided before the input of the mixer, for shifting a phase ofthe divided signal of the received RF signal; and a gain adjustable amplifier provided afterthe divider, and before or after the phase shifter, for amplifying the divided signal tosupply the phase-shifted and amplified signal to the adder. Accordingly a DC offset dueto the direct conversion can be removed and an adverse effect due to transient responsewhen the DC offset changes can be prevented.
申请人：Sachiko Tanaka
地址：Kawasaki JP
国籍：JP
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