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:
Feb. 03, 2015
Filed:
Jan. 20, 2011
Luiz Felipe Fuks, Fremont, CA (US);
Elango Pakriswamy, San Jose, CA (US);
Nicolas Monier, San Francisco, CA (US);
Chun-sup Kim, San Jose, CA (US);
Luiz Felipe Fuks, Fremont, CA (US);
Elango Pakriswamy, San Jose, CA (US);
Nicolas Monier, San Francisco, CA (US);
Chun-Sup Kim, San Jose, CA (US);
Ikanos Communications, Inc., Fremont, CA (US);
Abstract
A current controller includes impedance elements coupled to form at least one impedance ladder circuit which exhibits a fixed impedance at an input and current divider steps each differing in a current magnitude by a multiple of three with respect to the current magnitude in an adjacent less significant step. Single pole triple throw (SPTT) switchably couple an associated step in the impedance ladder circuit to one of three outputs. Three discrete current sources or sinks are each coupled to a corresponding one of the outputs of each of the SPTT switches. The digital driver is coupled to each control input of each SPTT switch to additively deliver selected ones of the stepped currents from each step of the impedance ladder circuit to a corresponding selected one of the current sources or sinks.