Zero Intermediate Frequency is a radio demodulation technique that does not use an intermediate frequency, but utilizes only one mixer stage to convert the desired signal directly to and from the baseband without any IF stages and without the need for external SAW filters.
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Zero if — refers to the nonstandard deletion of if where standard English has it, leading to sentences like this:* You ll get there on time you hurry up (you ll get there on time if you hurry up)Zero IF can also be short for Zero Intermediate Frequency.ee… … Wikipedia
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