PLL CIRCUIT

摘要

A PLL comprises a current control oscillator (18), a current source (28), and an initialization switch (26). The current control oscillator (18) generates an output clock signal according to a current signal generated based on the phase difference between a reference clock signal and a feedback clock signal. The initialization switch (26) is inserted in series to the input terminal of the current control oscillator (18) and the current source (28), and performs a switching operation according to an initialization signal.