Patent ID: 7818635

Claim:
A digital broadcast receiver for receiving an orthogonal frequency division multiplex (OFDM) digital signal, comprising: a first antenna and a second antenna, for receiving the OFDM digital signal in a reception channel having a reception frequency; a first tuner and a second tuner operating at the reception frequency and coupled to the first antenna and the second antenna, respectively, for converting the OFDM digital signal at the reception frequency into an intermediate-frequency (IF) signal; a first digital demodulator and a second digital demodulator coupled to an output of the first tuner and an output of the second tuner, respectively, for converting the IF signal into a digital signal and demodulating the digital signal into a demodulated signal for output; a diversity part coupled to the first digital demodulator and the second digital demodulator, for selecting or synthesizing the two demodulated signals for output; and a diversity controller for starting a power supply to the first tuner and the second tuner for diversity reception and for stopping the power supply to one of the first tuner and the second tuner for single reception; wherein, before the first tuner and the second tuner switch operating from the reception channel to another reception channel having another reception frequency, the diversity controller starts the power supply to the first tuner and the second tuner.