Title:
BAUD RATE CALIBRATION CIRCUIT AND SERIAL CHIP
Document Type and Number:
WIPO Patent Application WO/2020/029023
Kind Code:
A1
Abstract:
A baud rate calibration circuit and a serial chip. The calibration circuit comprises: a first counter (101) connected with a receiving module (20) of a serial chip, wherein the first counter is used for recording a first low-level duration of a data frame received by the receiving module; a second counter (102) connected with the receiving module, wherein the second counter is used for receiving a bit sampling pulse and recording the number of bit sampling pulses within the first low-level duration, and the bit sampling pulse is generated by the receiving module sampling the data frame according to the current baud rate of the receiving module; a divider (103) connected with the first counter and the second counter, wherein the divider is used for calculating a calibration baud rate according to the first low-level duration and the number of bit sampling pulses within the first low-level duration; and a selector (104) connected with the receiving module and the divider, wherein the selector is used for outputting the calibration baud rate to the receiving module. The present solution may realize the dynamic real-time calibration of the baud rate and improve the reliability of data reception.
Inventors:
WANG HUIZHAO (CN)
Application Number:
PCT/CN2018/099008
Publication Date:
February 13, 2020
Filing Date:
August 06, 2018
Export Citation:
Assignee:
SHENZHEN GOODIX TECH CO LTD (CN)
International Classes:
H03B5/04
Foreign References:
| CN109075742A | 2018-12-21 | |||
| CN101431389A | 2009-05-13 | |||
| US20160127109A1 | 2016-05-05 |
Other References:
See also references of EP 3637271A4
Attorney, Agent or Firm:
SHANGHAI CHENHAO INTELLECTUAL PROPERTY LAW FIRM GENERAL PARTNERSHIP (CN)
Download PDF: