Charge pump and phase-detecting apparatus, phase-locked loop and delay-locked loop using the same

摘要

A charge pump including a first current source, a second current source, a first switch, a second switch, a third switch, a fourth switch, and a reset switch is provided. First terminals of the first and the third switch are coupled to the first current source. First terminals of the second and the fourth switch are coupled to the second current source. Second terminals of the first, the second, and the reset switch are coupled to an output terminal of the charge pump. A first terminal of the reset switch is coupled to the second terminals of the third and the fourth switch. Control terminals of the first, the second, the third, and the fourth switch respectively receive a first control signal, a second control signal, an inverted signal of the first control signal, and an inverted signal of the second control signal.