Patent ID: 8768283
Filing Date: 2014-07-01
Classification: H03D,H04B

Abstract:
1. A complex intermediate frequency (CIF) mixer stage for converting intermediate frequency (IF) signals to baseband frequency signals, the IF signals comprising a first phase signal and a second phase signal, the baseband frequency signals comprising a lower side band signal and an upper side band signal, the CIF mixer stage comprising: a first branch for receiving the first phase signal and comprising: a second branch for receiving the second phase signal and comprising: a first adder for combining the fourth and third output signals to form a first phase portion of the lower side band signal; a second adder for combining the second and sixth output signals to form a second phase portion of the lower side band signal; a third adder for combining the fourth and first output signals to form a first phase portion of the upper side band signal; a fourth adder for combining the second and fifth output signals to form a second phase portion of the upper side band signal; wherein the first, second, and third IF clock signals have a predefined phase relationship with respect to each other.