The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 29, 2024
Filed:
May. 27, 2021
Ntt Electronics Corporation, Yokohama, JP;
NTT ELECTRONICS CORPORATION, Yokohama, JP;
Abstract
A data transfer circuit according to the invention includes a memory configured to write data in accordance with a write pointer in synchronization with a first clock, and read out the data in accordance with a readout pointer in synchronization with a second clock, a clock generation circuit configured to generate the second clock by multiplying a reference clock by a rational number N, a frequency error estimation circuit configured to estimate a frequency error between the first clock and the second clock based on a change amount of a pointer difference between the write pointer and the readout pointer, and an adjustment circuit configured to output, as an adjustment multiple ΔN, a value obtained by dividing the estimated frequency error by a frequency of the reference clock. The clock generation circuit generates the second clock by multiplying the reference clock by a rational number (N+ΔN).