OSCILLATION CIRCUIT, CHIP, AND ELECTRONIC DEVICE

Title:

OSCILLATION CIRCUIT, CHIP, AND ELECTRONIC DEVICE

Document Type and Number:

WIPO Patent Application WO/2021/097673

Kind Code:

A1

Abstract:

Provided are an oscillation circuit, a chip, and an electronic device. An oscillation circuit, comprising: two charging and discharging circuits, a reference voltage switching module (2), two comparators, and a logic control module (4); when the output of any one comparator jumps, the logic control module (4) controls the charging and discharging circuit connected to said comparator to discharge, controls the other charging and discharging circuit to charge, and controls the reference voltage switching module (2) to switch the reference voltage of said comparator to a second voltage; when the output of said comparator jumps, the logic control module (4) controls a charging and discharging circuit to charge; and, when the output of said comparator jumps, the logic control module (4) controls the reference voltage switching module (2) to switch the reference voltage of said comparator to a first voltage, and controls a charging and discharging circuit to stop charging. The present oscillating circuit uses a method of subtracting the delay time of the comparator at different reference voltages to remove a delay time affecting precision in the oscillating circuit, and thereby increases the precision of the oscillation circuit.

Inventors:

CHEN JIANXING (CN)

Application Number:

PCT/CN2019/119486

Publication Date:

May 27, 2021

Filing Date:

November 19, 2019

Export Citation:

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Assignee:

SHENZHEN GOODIX TECH CO LTD (CN)

International Classes:

H03B5/30; G06F1/04

Foreign References:

CN111108684A	2020-05-05
CN108964610A	2018-12-07
CN105071786A	2015-11-18
US20130038364A1	2013-02-14
US20100007387A1	2010-01-14
CN102324912A	2012-01-18
CN102158203A	2011-08-17
JP2002140131A	2002-05-17

Other References: