Glossary Definition for I/Q

Glossary Term: I/Q 

Definition

1. I/Q modulation is a method for combining two channels of information into one signal so that they can be separated at a later stage. Two quadrature carriers, 90 degrees out of phase, are modulated, then combined.

Abbreviated from "in-phase/quadrature-phase" which refers to the two carrier signals' phase relationship.

2. IQ (Q should be subscripted but sometimes printed as "IQ" without subscripting): Quiescent current: The current consumed when a circuit is in a quiet state, driving no load and if appropriate, with its inputs not cycling.

3. Intelligence quotient, a measure in which electrical engineers invariably excel.

Synonyms
  • IQ

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