Patent ID: 7884684

Claim:
A multiplexer circuit for coupling at least one antenna to a CB receiving apparatus operative in a CB frequency range, to an FM receiving apparatus, and to a television receiving apparatus, the multiplexer circuit comprising: an input conductor adapted to connect to at least one antenna; a first output conductor adapted to connect to a CB radio apparatus; a second output conductor adapted to connect to a television receiving apparatus; a third output conductor adapted to connect to an FM receiving apparatus; a first inductor and a first capacitor connected in series to form a series LC circuit between the input conductor and the first output conductor configured to provide low impedance to signals inside the CB frequency range and high impedance to signals outside the CB frequency range; a second inductor and a second capacitor connected in parallel to form a parallel LC circuit between the input conductor and a line extending to the second and third output conductors configured to provide high impedance to signals inside the CB frequency range; and a node in the line where the line is split into the second and third conductors.