Patent ID: 7043221
Filing Date: 2006-05-09
Classification: H03B,H03D

Abstract:
1. A mixer circuit with image frequency rejection, the mixer circuit comprising a quadrature phase divider ( 30 , 30 ′) presenting an input connected to the input (F i ) of the mixer circuit, and two outputs respectively delivering two signals in phase quadrature which are applied respectively to two simple mixers ( 31 , 32 ; 31 ′, 32 ′), the circuit being characterized in that it comprises a quadrature phase and frequency divider ( 33 , 33 ′) having a frequency division ratio and presenting two inputs respectively connected to the respective outputs of the two simple mixers ( 31 , 32 ; 31 ′, 32 ′) and a first output delivering a first output signal (F o ) of the mixer circuit, which signal is applied to the inputs of the two simple mixers.