Patent ID: 6345178
Filing Date: 2002-02-05
Classification: H03D

Abstract:
An RF mixer, comprising:a first local oscillator differential transistor pair including first and second transistors and means for connecting a local oscillator as an input to said first local oscillator differential transistor pair; a second local oscillator differential transistor pair including third and fourth transistors and means for connecting a local oscillator as an input to said second local oscillator differential transistor pair; a first stage input frequency differential transistor pair including fifth and sixth transistors, said fifth transistor coupled to said first and second transistors and said sixth transistor coupled to said third and fourth transistors; a second stage input frequency differential transistor pair including seventh and eighth transistors, said seventh transistor coupled to said fifth transistor and said eighth transistor coupled to said sixth transistor; a bias voltage circuit connected to said first stage input frequency transistor pair; a bias current circuit connected to said second stage input frequency differential transistor pair; and means for connecting an input frequency signal to said first stage input frequency differential transistor pair and connecting an inverted input frequency signal to said second stage input frequency differential transistor pair.