US Patent 7508244 Tuning of a phase-locked loop, and an electronic device

There is provided an electronic device comprising: a control block for providing a control signal; a voltage-controlled oscillator; a divider block; a detector block for receiving a frequency-divided output signal from the divider block, for receiving a reference frequency signal and for providing a feedback control signal to the voltage-controlled oscillator. The voltage-controlled oscillator is further configured to include a frequency offset to the voltage-controlled oscillator output signal; and the control block is further configured to control the frequency offset included in the voltage-controlled oscillator output signal on the basis of fractional division ratio information and actual division state information received from the phase-locked loop.