阅读说明：本技术 一种锁相环 (Phase-locked loop ) 是由 李炜 周唯祎 周盛华 于 2019-05-23 设计创作，主要内容包括：本申请公开了一种锁相环,涉及芯片技术领域,能够解决电荷泵的非理想特性时功耗大、噪声大以及电荷泵电路结构复杂的问题。锁相环包括电荷泵,电荷泵包括一对电流源,两条差分路径,电荷泵还包括第一开关管和第二开关管,第一开关管和第二开关管分别被设置在两条差分路径上,电荷泵还包括第一辅助管和第二辅助管,第一辅助管的栅极被耦合至第一开关管的栅极,第二辅助管的栅极被耦合至第二开关管的栅极,第一辅助管的第一端被耦合至第一电流源,第一辅助管的第二端被耦合至第二开关管的第二端,第二辅助管的第一端被耦合至第一电流源,第一辅助管的第二端被耦合至第一开关管的第二端。本申请实施例用于抑制电荷泵的非理想因素。(The application discloses phase-locked loop relates to chip technical field, and the problem that the power consumption is big, the noise is big and charge pump circuit structure is complicated when the nonideal characteristic of charge pump can be solved. The phase-locked loop comprises a charge pump, the charge pump comprises a pair of current sources, two differential paths, the charge pump further comprises a first switch tube and a second switch tube, the first switch tube and the second switch tube are respectively arranged on the two differential paths, the charge pump further comprises a first auxiliary tube and a second auxiliary tube, a grid electrode of the first auxiliary tube is coupled to a grid electrode of the first switch tube, a grid electrode of the second auxiliary tube is coupled to a grid electrode of the second switch tube, a first end of the first auxiliary tube is coupled to the first current source, a second end of the first auxiliary tube is coupled to a second end of the second switch tube, a first end of the second auxiliary tube is coupled to the first current source, and a second end of the first auxiliary tube is coupled to a second end of the first switch tube. The embodiment of the application is used for suppressing non-ideal factors of the charge pump.)