| 摘要 |
A phase-locked loop circuit includes a first circuit, a second circuit, and a voltage down converter. The first circuit uses a first power voltage and generates a first signal based on a reference signal and a feedback signal. The second circuit uses a second power voltage which is lower than the first power voltage, generates an oscillation signal based on the second signal, and divides the oscillation signal to generate a feedback signal. The voltage down converter is combined between the first circuit and the second circuit, drops the activation voltage level of the first signal, converts it into a second signal, and is a passive device. |
