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:
Aug. 25, 2015
Filed:
Oct. 09, 2013
Pmc-sierra Us, Inc., Sunnyvale, CA (US);
Johannes G. Ransijn, Wyomissing Hills, PA (US);
PMC-Sierra US, Inc., Sunnyvale, CA (US);
Abstract
A distributed Analog Finite Impulse Response (AFIR) filter circuit with n physical taps provides an output equivalent to an AFIR filter circuit with 2n−1 taps by emulating n−1 taps. An impedance mismatch, with respect to the characteristic impedance of the input and output transmission lines, is imposed at the input and output terminals to take advantage of the resulting reflective signal paths, which emulate the additional taps. This implementation results in space-savings and power-savings for on-chip implementations of the circuit. Implementations disclosed herein are advantageous in telecommunication applications that rely heavily on copper/FR4 backplanes in serial data links.