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:
Dec. 16, 2008
Filed:
Mar. 25, 2004
Joseph O. Marsh, Poughkeepsie, NY (US);
Jeremy Stephens, Seattle, WA (US);
Charlie C. Hwang, Wappingers Falls, NY (US);
James S. Mason, Eastleigh, GB;
Huihao Xu, Brooklyn, NY (US);
Matthew B. Baecher, Newburgh, NY (US);
Thomas J. Bardsley, Poughkeepsie, NY (US);
Mark R. Taylor, Essex Junction, VT (US);
Joseph O. Marsh, Poughkeepsie, NY (US);
Jeremy Stephens, Seattle, WA (US);
Charlie C. Hwang, Wappingers Falls, NY (US);
James S. Mason, Eastleigh, GB;
Huihao Xu, Brooklyn, NY (US);
Matthew B. Baecher, Newburgh, NY (US);
Thomas J. Bardsley, Poughkeepsie, NY (US);
Mark R. Taylor, Essex Junction, VT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A circuit of testing an analog driver circuit using digital scan-based test methodologies. The circuit of the present invention includes a control circuit for generating signals in response to a test enable signal, a differential driver circuit for receiving a differential input signal, amplifying the differential input signal and transmitting a differential output signal in response to the differential input signal and the signals generated by the control circuit, a programmable termination impedance circuit for generating a differential termination impedance at the output node of the differential driver circuit in response the signals generated by the control circuit, and a differential receiver circuit for receiving the differential output from the differential driver circuit, convert the differential output signal to a single ended signal and transmitting the single ended signal, all in response to the test enable signal.