Patent ID: 8903102

Claim:
An adapter, removably coupleable to an electronic device having a device processor to receive a radio frequency (RF) frequency television signal within a first legacy band or a second legacy band, the adapter comprising: a headset, having: a first earbud for producing audio according to a first input signal; a second earbud for producing audio according to a second input signal; a first signal conductor communicatively coupled to a first earbud input and the first input signal; a second signal conductor communicatively coupled to a second earbud first input and the second input signal; a common conductor communicatively coupled to a first earbud ground and a second earbud common; an isolation circuit, coupled between an audio amplifier output and the first earbud input and the second earbud input, the isolation circuit for blocking the RF frequency signals from the audio amplifier while passing audio frequency signals from the audio amplifier; a switch, having a signal input, a control input, a first signal output and a second signal output, wherein: the signal input is coupled to one of the first signal conductor and the common conductor; and the switch communicatively couples the signal input to either the first signal output or the second signal output according to the control input; a first legacy frequency band matching network communicatively coupled between the first signal output and a first input of a tuner; a second legacy frequency band matching network communicatively coupled to the second signal output and a second input of the tuner; and an adapter processor, communicatively coupled to the switch control input, for generating a switch command according to a channel command received from the device processor; wherein the first legacy frequency band matching network matches an input impedance of the first tuner input with an output impedance of the switch; and wherein the second legacy frequency band matching network matches an input impedance of the second tuner input with the output impedance of the switch.