PHASE LOCKED LOOP - HUAWEI TECH CO LTD

Title:

PHASE LOCKED LOOP

Document Type and Number:

WIPO Patent Application WO/2020/232726

Kind Code:

A1

Abstract:

The present application relates to the technical field of chips, and provides a phase locked loop, capable of solving the problems of high power consumption and high noise when a charge pump has non-ideal characteristics and complicated circuit structure of the charge pump. The phase locked loop comprises a charge pump. The charge pump comprises a pair of current sources and two differential paths. The charge pump further comprises a first switch tube and a second switch tube which are respectively provided on the two differential paths. The charge pump further comprises a first auxiliary tube and a second auxiliary tube. A gate of the first auxiliary tube is coupled to a gate of the first switch tube, and a gate of the second auxiliary tube is coupled to a gate of the second switch tube. A first end of the first 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 second switch tube. A first end of the second auxiliary tube is coupled to the first current source, and the second end of the first auxiliary tube is coupled to a second end of the first switch tube. Embodiments of the present application are used for inhibiting non-ideal factors of the charge pump.

Inventors:

LI WEI (CN)
ZHOU WEIYI (CN)
ZHOU SHENGHUA (CN)

Application Number:

PCT/CN2019/088214

Publication Date:

November 26, 2020

Filing Date:

May 23, 2019

Export Citation:

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Assignee:

HUAWEI TECH CO LTD (CN)

International Classes:

H03L7/08; H03L7/089; H03L7/18

Foreign References:

CN109167599A	2019-01-08
CN102347760A	2012-02-08
CN102075183A	2011-05-25
CN102130681A	2011-07-20
US8461886B1	2013-06-11
US20150200676A1	2015-07-16

Other References: