Title:
DUTY CYCLE CALIBRATION CIRCUIT, ELECTRONIC DEVICE AND METHOD
Document Type and Number:
WIPO Patent Application WO/2020/077557
Kind Code:
A1
Abstract:
Provided in the present application are a duty cycle calibration circuit, an electronic device and a method, used to implement real time, bi-directional and highly accurate calibration of a duty cycle. The circuit comprises: a pre-processing circuit, used to generate a first clock signal and a second clock signal having opposite high and low levels according to an input clock signal; a delay circuit, used to delay the first clock signal so as to obtain a a first delayed signal, and to delay the second clock signal so as to obtain a second delayed signal; an edge-triggered pulse generator, used to generate an output clock signal according to a rising/falling edge of the first delayed signal and a rising/falling edge of the second delayed signal; and a duty cycle regulator, used to detect a duty cycle of the output clock signal and generate a control signal according to said duty cycle, so as to regulate the delay of the first clock signal and/or the delay of the second clock signal.
Inventors:
TAO TINGTING (CN)
MAO YIHONG (CN)
HUANG CHONG (CN)
MAO YIHONG (CN)
HUANG CHONG (CN)
Application Number:
PCT/CN2018/110617
Publication Date:
April 23, 2020
Filing Date:
October 17, 2018
Export Citation:
Assignee:
HUAWEI TECH CO LTD (CN)
International Classes:
H03K3/017
Foreign References:
| CN101303887A | 2008-11-12 | |||
| CN101303887A | 2008-11-12 | |||
| CN103795375A | 2014-05-14 | |||
| CN105577142A | 2016-05-11 | |||
| CN103248343A | 2013-08-14 | |||
| CN102361453A | 2012-02-22 | |||
| US6642760B1 | 2003-11-04 |
Attorney, Agent or Firm:
BEIJING ZBSD PATENT & TRADEMARK AGENT LTD. (CN)
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