Patent ID: 7251466

Claim:
A tuner circuit receiving an input RF signal having a first transmission spectrum, the tuner circuit comprising: a band selection filter coupled to receive the input RF signal and provide a band selected output signal, wherein the band selection filter comprises a plurality of band pass filters, each band pass filter comprising an inductor and a variable capacitor forming an LC resonator, the inductor of the LC resonator being formed as an integrated planar spiral inductor; and a frequency conversion circuit coupled to receive an input signal corresponding to the band selected output signal of the band selection filter and provide a frequency converted output signal having a predetermined frequency, wherein the band selection filter comprises: a first variable amplifier having an input node coupled to receive the input RF signal and an output node providing a first output signal; a plurality of band pass filters connected in parallel between the output node of the first variable amplifier and a first node, the first node providing the band selected output signal of the band selection filter, each band pass filter being disposed to select a different portion of the first transmission spectrum so that the plurality of band pass filters is disposed to select the entire frequency range of the first transmission spectrum; and each band pass filter comprising: a first switch coupled between the output node of the first variable amplifier and a second node; a plurality of switchably connected capacitors connected in parallel between the second node and a first voltage, each switchably connected capacitor comprising a capacitor and a switch connected in series between the second node and the first voltage; an inductor coupled between the second node and a second voltage, the inductor being an integrated planar spiral inductor, wherein the inductance of the inductor and the capacitance provided by the plurality of switchably connected capacitors form an LC resonator; and a unity gain buffer having an input node coupled to the second node and an output node coupled to the first node providing the band selected output signal.