Patent ID: 8155609

Claim:
An RF tuner for receiving reception signals of a first type and a second type, the tuner comprising: a switch-able tuned input filter that can be switched in response to input of a first reception signal of the first type and to input of a second reception signal of the second type, wherein the input filter comprises: an RF signal input terminal configured to receive the first reception signal or the second reception signal; an RF signal output terminal; a switch; a first tune-able part that includes a first capacitor in series with a variable capacitor, wherein the first capacitor is connected to the RF signal input terminal through the variable capacitor; and a second part that includes a first coil and an inductive element, wherein the first leg of the first coil is connected to the first leg of the inductive element, wherein the switch can substantially RF shortcut the inductive element by switching a substantially large second capacitor in parallel with the inductive element, wherein the inductive element comprises a second coil, and wherein the first leg of the second capacitor is connected to the connection of the first leg of the first coil and the first leg of the inductive element and wherein the switch comprises: a diode connected by the anode of the diode to the second leg of the second capacitor and with the cathode of the diode connected to the second leg of the inductive element; and an FM switch input connector connected to the anode of the diode and wherein the second leg of the first coil is connected to a low potential, wherein the FM switch input connector is connected to the RF signal input terminal through the diode.