PLL CIRCUIT

摘要

A PLL circuit (1) comprising a series coupling of a charge pump (10), a loop filter (20) and a voltage-controlled oscillator (30) generating an output frequency (f), said voltage-controlled oscillator (30) comprising tunable devices (C1, C2, C1', C2, C3) controlled by a first control signal (Vtl) generated by the loop filter (20), the PLL circuit (1)being characterized in that it further comprises a leakage compensation circuit (40) for generating a leakage compensation signal (IL, ) to modify a control of the voltage-controlled oscillator (30), the leakage compensation signal (IL) being indicative for a leakage current in the tunable devices of the voltage-controlled oscillator (30).