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This paper describes a new Darlington AC-coupled mixer operating at 8 GHz with improved figure-of-merits. This Darlington AC-coupled mixer along with a simple AC- coupling mixer used for reference are implemented in a 0.35 mum SiGe bipolar process. The supply voltage and current consumption are 3.2 V and 28 mA. In the Darlington AC-coupling mixer, the conversion gain, the operating bandwidth, and...
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