Patent ID: 6184739
Filing Date: 2001-02-06
Classification: H03D

Abstract:
An apparatus comprising:a first transformer for receiving a first signal;a second transformer for receiving a second signal;a multiplier circuit coupled to said first transformer for receiving said first signal and further coupled to said second transformer for receiving said second signal, whereinsaid multiplier circuit comprises:a first differential pair having a first drain lead, a second drain lead, a first gate lead, and a second gate lead, wherein said first and said second drain leads are coupled to said first and said second gate leads respectively;a second differential pair having a third drain lead, a fourth drain lead, a third gate lead, a fourth gate lead and a first base lead, wherein said third and said fourth gate leads are coupled to said second and said first gate leads of said first differential pair respectively; anda third differential pair having a fifth drain lead, a sixth drain lead, a fifth gate lead, a sixth gate lead and a second base lead, wherein said fifth and said sixth gate leads are coupled to said first and said second gate leads of said first differential pair respectively wherein said apparatus is in a down converter mode, said fifth and said sixth gate leads are coupled to said first gate lead wherein said apparatus is in an up converter mode, said fifth and said sixth drain leads are coupled to said third and said fourth drain leads of said second differential pair respectively.