Title:
DUTY CYCLE CALIBRATION CIRCUIT AND METHOD, CHIP, AND ELECTRONIC DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/184851
Kind Code:
A1
Abstract:
A duty cycle calibration circuit and method, a chip, and an electronic device. In the duty cycle calibration circuit, a counting unit uses a counting clock signal having a clock signal frequency higher than that of a correction clock signal to obtain the quantity of counting pulses generated in a high-level state and a low-level state of the correction clock signal within a preset counting period, so as to obtain an actual duty cycle of the correction clock signal. Compared with the manner of comparing a correction clock signal with a reference clock signal to obtain a duty cycle of the correction clock signal, the problem that duty cycle detection of the correction clock signal is inaccurate due to the fact that the reference clock signal is affected can be solved. Thus, the accuracy of the duty cycle detection can be improved, and the accuracy of the duty cycle calibration can be improved.
Inventors:
DING JIANYU (CN)
LI YUETING (CN)
YANG YANG (CN)
GUO XU (CN)
LIU YANG (CN)
LI YUETING (CN)
YANG YANG (CN)
GUO XU (CN)
LIU YANG (CN)
Application Number:
PCT/CN2022/115949
Publication Date:
October 05, 2023
Filing Date:
August 30, 2022
Export Citation:
Assignee:
AMLOGIC SHANGHAI CO LTD (CN)
International Classes:
H03K5/156
Foreign References:
| CN114665848A | 2022-06-24 | |||
| CN104428994A | 2015-03-18 | |||
| CN104753499A | 2015-07-01 | |||
| CN108566183A | 2018-09-21 | |||
| JP2002005973A | 2002-01-09 |
Attorney, Agent or Firm:
INTEBRIGHT LLP (CN)
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