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:
Nov. 03, 2026
Filed:
May. 07, 2025
Anritsu Corporation, Kanagawa, JP;
Masashi Takiguchi, Kanagawa, JP;
Takaki Fujiwara, Kanagawa, JP;
ANRITSU CORPORATION, Kanagawa, JP;
Abstract
An error rate measurement apparatus includes: a symbol count unit that counts decision results as PAM symbols, and calculates a ratio of a determination frequency of a symbol level of 3 to a determination frequency of a symbol level of 2, and a ratio of a determination frequency of a symbol level of 1 to a determination frequency of a symbol level of 0; and a control unit that adjusts and controls Vth_Middle such that Vth_Middle has the voltage value of the average DC value voltage of the PAM4 signal measured, adjusts and controls Vth_Upper such that the determination frequency of the symbol level of 3 and the determination frequency of the symbol level of 2 have a desired ratio, and adjusts and controls Vth_Lower such that the determination frequency of the symbol level of 1 and the determination frequency of the symbol level of 0 have a desired ratio.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile