专利名称：Down-converter using an on-chip bias circuit for enhancing symmetry and linearity and testing device thereof
专利国别：美国
专利号：US7049878 B2
法律状态：授权
发明人：Bingxue Shi, Baoyong Chi
申请人：Winbond Electronics Corp.
地址：
申请日期：2004-06-03
授权日期：2006-05-23
摘要：
A down-converter and a testing device for the down-converter are provided. The down-converter implements a Class-AB single-end input, differential output double balanced mixer structure. By introducing an on-chip bias loop, it significantly improves the symmetry and linearity of the mixer. The down-converter on-chip implements an input impedance match circuit and an open-drain output stage. By optimizing the circuit structure and each device, it achieves the objectives of a high conversion gain, high linearity, and low noise coefficient.
专利证书：
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