Patent ID: 7266350
Filing Date: 2007-09-04
Classification: H04B

Abstract:
1. A radio frequency tuner for analogically and digitally modulated signals, comprising a tuner arrangement for converting any selected one of analog and digital channels to one of baseband and zero intermediate frequency analog quadrature signals, a low pass filter for filtering out the selected channel from said analog quadrature signals, the low pass filer attenuating a first channel adjacent to the selected channel, the low pass filter attenuating a second channel at an aliasing frequency of the selected channel, the low pass filter correcting imbalances based on a feedback signal, and the low pass filter being a quadrature anti-alias filter, a dual analog-digital converter for converting said analog quadrature signals to digital quadrature signals, and a digital signal processor coupled with the low pass filter for processing said digital quadrature signals, said processing including performing channel filtering to pass said selected channel and substantially to reject other channel signals, said processor providing the feedback signal to the low pass filter.