Television receiver including an integrated band selection filter

A band pass filter bank for a television tuner for tuning an input RF signal having a first transmission spectrum, the band pass filter bank comprising:

• 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 pass filter bank, 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.

A band pass filter for filtering an input RF signal, comprising:

• 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 band pass filter connected between the output node of the first variable amplifier and a first node providing the filtered output signal, the 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 filtered output signal.