Patent ID: 7945228

Claim:
A receiver comprising: a first semiconductor chip and a second semiconductor chip for receiving a signal in a first radio frequency band; and a communication unit for performing communication using a signal in a second radio frequency band, the first semiconductor chip including: a first local oscillator for oscillating a first local signal; a first mixing unit for frequency-converting the signal of the first radio frequency band using the first local signal supplied from the first local oscillator; and a first-local-signal-output terminal for outputting the first local signal supplied from the first local oscillator to the second semiconductor chip, the second semiconductor chip including: a second local oscillator for oscillating a second local signal; a first-local-signal-input terminal for inputting the first local signal supplied from the first-local-signal-output terminal into the second semiconductor chip; and a second mixing unit for frequency-converting the signal of the first radio frequency band using one of the second local signal supplied from the second local oscillator and the first local signal supplied from the first-local-signal-input terminal, wherein, when frequency of the first local signal is determined to be in a predetermined frequency range of the second frequency band, the first semiconductor chip does not output the first local signal to the second semiconductor chip, and the second mixing unit frequency-converts the signal of the first radio frequency band using the second local signal, wherein, when frequency of the first local signal is determined to be out of the predetermined frequency range of the second frequency band, the first semiconductor chip outputs the first local signal to the second semiconductor chip, and the second mixing unit frequency-converts the signal of the first radio frequency band using the first local signal.