Patent ID: 6807407
Filing Date: 2004-10-19
Classification: H03D

Abstract:
A double balanced mixer for mixing an RF input signal with a local oscillator signal to provide at an output an intermediate frequency signal with a high third order intercept point, comprising:(a) a first double balanced mixer having a first and second input port for receiving the local oscillator signal, the first mixer having a third and a fourth input port for receiving the RF signal, the first mixer further having a first and second output port for providing the intermediate frequency signal; and (b) a second double balanced mixer connected in parallel with the first double balanced mixer, the second double balanced mixer having a fifth and sixth input port for receiving the local oscillator signal, the second mixer having a seventh and eighth input port for receiving the RF signal, the second mixer further having a third and fourth output port for providing the intermediate frequency signal, the parallel connected first and second double balanced mixers reducing third order products and increasing the third order intercept point.