| 摘要 |
The loop filter in the PLL includes: a filter circuit (first partial circuit) including a capacitive element, one end of the first partial circuit being connected to an output terminal of a charge pump circuit, a voltage for controlling a voltage-controlled oscillator being output from the other end of the first partial circuit; a voltage buffer circuit to which a voltage at a predetermined node in the filter circuit is input; and a filter circuit (second partial circuit), one end of the second partial circuit being connected to the output terminal of the charge pump circuit, the other end being connected to an output terminal of the voltage buffer circuit.
|
