Author - J.G. Gardiner

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J.G. Gardiner	Write for Microwaves & RF

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March 2010 [Components]
Image-Reject Mixer Arms Direct-Conversion Receivers
Mixer linearity is critical to the performance of direct-conversion receivers with low intermediate frequencies (IFs). By biasing a low-IF image-reject mixer designed for a fully duplex system, such as UMTS, it is possible to achieve outstanding linearity even in the presence of large blocking (interference) signals, and even in a UMTS system, where the transmit signal is often the largest blocking signal for the receiver. The mixer is designed for...