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. 26, 1999
Filed:
Dec. 23, 1998
Shigeru Maruyama, Tokyo, JP;
NEC Corporation, Tokyo, JP;
Abstract
An output buffer circuit includes a pull-up section for connecting therethrough a source line Vcc and an impedance control terminal, a comparator for comparing the potential of the impedance control terminal against a potential of Vcc/2, an UP/DOWN counter for up- and down-counting clock pulses of a clock signal based on the result of the comparison, a D/A converter for converting an output from the UP/DOWN counter, an output section, connected between the source line Vcc and an output terminal, for receiving an input data signal to output an output data signal based on the input data signal. The output from the D/A converter controls both the ON-resistances of the pull-up section and the output section. The output impedance of the output buffer circuit is controlled based on the resistance of an external resistor connected between the impedance control terminal and ground.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile