Patent ID: 7734259
Filing Date: 2010-06-08
Classification: H04B

Abstract:
1. A method for processing signals, the method comprising: adjusting, in a transmitter, a current supplied to a fully differential mixer for an I channel and a current supplied to a fully differential mixer for a Q channel, thereby reducing local oscillator feed through without introducing a difference in DC common mode level between said I channel and said Q channel; adjusting said current supplied to said fully differential mixer for said I channel and said current supplied to said fully differential mixer for said Q channel by one or both of a first common amount and a second common amount, wherein said second common amount is less than said first common amount; increasing said current supplied to said fully differential mixer for said I channel and said current supplied to said fully differential mixer for said Q channel by said first common amount; increasing said current supplied to a first differential input of said fully differential mixer for said I channel by said second common amount and decreasing said current supplied to a second differential input of said fully differential mixer for said I channel by said second common amount; and independently adjusting said current supplied to said fully differential mixer for said I channel and said current supplied to said fully differential mixer for said Q channel.