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. 26, 2002
Filed:
Mar. 23, 2001
Ralf Schneider, München, DE;
Stephan Schröder, München, DE;
Infineon Technologies AG, Munich, DE;
Abstract
An integrated circuit includes a terminal supplying a digital signal, a controllable driver circuit connected to the terminal and outputting the digital signal, and a comparator device. An actuating circuit actuates the driver circuit as a function of a clock signal. The comparator device compares the timing of signal transitions of the clock signal with transitions of the digital signal. The comparator has a first comparator input for receiving the clock signal and a second comparator input connected to the driver output for receiving the digital signal. The comparator device outputs an output signal having a first state if a signal transition of the clock signal at the first input takes place before a signal transition of the digital signal at the second input, and outputs a second state if the clock signal transition takes place after digital signal transition. In a test mode, the invention compares the clock and digital signal timings with a high degree of accuracy.