Merged variable gain mixers

专利名称：Merged variable gain mixers发明人：Madhu Avasarala申请号：US09092808申请日：19980605公开号：US06212369B1公开日：20010403

专利附图：

摘要：The present invention teaches parallel coupling what are herein termed a“switching stage” and a “steering stage,” thereby arranging the mixer and variablegain amplifier circuitry as a single merged circuit. The merged variable gain mixers of thepresent invention provide mixing and gain functionality utilizing only that power needed

for a basic mixer function and only the transconductance of the basic mixer function(thereby eliminating non-linearities introduced by additional transconductance stages ofprior art circuitry). Further, in the merged variable gain mixers described herein, noadditional headroom is needed other than what is required by the basic mixer function.The present invention contemplates a variety of merged variable gain mixers including ACand DC coupled merged variable gain mixer of both single and double balancedconfiguration.

申请人：MAXIM INTEGRATED PRODUCTS, INC.

代理机构：Hickman Coleman & Hughes, LLP

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