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. 14, 2008
Filed:
Apr. 18, 2007
Ols Hidri, Munich, DE;
Robert Callaghan Taft, Munich, DE;
Ols Hidri, Munich, DE;
Robert Callaghan Taft, Munich, DE;
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
An integrated circuit requires on-chip termination resistor for minimizing reflections from input signals supplied by an external signal source. The input signal is applied across two bonding pads which serve as input terminals for the integrated circuit. The first bonding pad is coupled to a first on-chip terminating resistor through a first on-chip inductor. The second bonding pad is coupled to a second on-chip terminating resistor though a second on-chip inductor. The two on-chip inductors are arranged in a transformer configuration where the mutual inductance relative to the applied input signal is negative. During operation, the on-chip transformer arrangement effectively shorts common-mode signals to the on-chip terminating resistors and effectively blocks differential-mode signals from the on-chip terminating resistors. Effective bandwidth and common-mode rejection performance is improved with the described on-chip transformer arrangement.