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:
Jan. 14, 2020
Filed:
Nov. 28, 2018
Jacob Pike, Almonte, CA;
Mahdi Parvizi, Kanata, CA;
Naim Ben-hamida, Nepean, CA;
Sadok Aouini, Gatineau, CA;
Calvin Plett, Ottawa, CA;
Jacob Pike, Almonte, CA;
Mahdi Parvizi, Kanata, CA;
Naim Ben-Hamida, Nepean, CA;
Sadok Aouini, Gatineau, CA;
Calvin Plett, Ottawa, CA;
Ciena Corporation, Hanover, MD (US);
Abstract
A decision feedback equalizer (DFE) comprises two charge-steering (CS) input latches driven by complementary ½-rate clocks, two pairs of CS primary latches, and two pairs of taps. The primary latches are driven by ¼-rate clocks. In a first aspect, each one of the input latches and the primary latches includes a respective differential pair of n-channel output transistors, and each tap includes a respective differential pair of p-channel input transistors. In a second aspect, each one of the input latches and the primary latches includes a respective differential pair of p-channel input transistors, and each tap includes a respective differential pair of n-channel output transistors. In some implementations, no element of any one of the taps is driven by any ½-rate clock. In some implementations, every switch of at least one of the taps is driven by one of the ¼-rate clocks.