| 摘要 |
A single conversion tuner comprises an image reject downconverter and a plurality of tracking RF bandpass filters ahead of the downconverter for providing image rejection. The downconverter comprises first and second mixers which mix the signal from the filters with quadrature commutating signals from a commutating signal generator. The mixer outputs are filtered by first and second roofing filters and the filtered signals are summed in a summer amplifier. The roofing filters may be off-chip inductance/capacitance filters. |
