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. 17, 2006
Filed:
Jun. 15, 2001
Yiu Lam Chan, Raleigh, NC (US);
Michael R. Sollins, Raleigh, NC (US);
Ronald R. Munoz, Raleigh, NC (US);
Yiu Lam Chan, Raleigh, NC (US);
Michael R. Sollins, Raleigh, NC (US);
Ronald R. Munoz, Raleigh, NC (US);
ADC DSL Systems, Inc., Eden Prairie, MN (US);
Abstract
A circuit that uses a bi-directional buffer as follows: First a tri-state output buffer is connected to a functional clock and a bi-directional port is connected to a test clock. The bi-directional buffer is configured to receive control signals to selectively block and unblock the tri-state output port connected to the functional clock. In addition, the bi-directional port connected to a test clock is connected to the internal logic of the device. When the tri-state output buffer connected to the functional clock is blocked, the test clock transmits a clock signal to the internal logic of the device. When the tri-state output buffer connected to the functional clock is unblocked, the functional clock transmits a clock signal to the internal logic of the device.