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:
Mar. 26, 2002
Filed:
Dec. 21, 1999
Applicant:
Inventors:
Robert J. Bosnyak, San Jose, CA (US);
José M. Cruz, Palo Alto, CA (US);
Assignee:
Sun Microsystems, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03K 1/704 ;
U.S. Cl.
CPC ...
H03K 1/704 ;
Abstract
An improved output driver for HSTL includes a bias control transistor to absorb current leaking through the base-collector capacitance of the drive transistor and maintain the base voltage on the drive transistor. The bias control transistor is biased by a series network coupled between a base of the bias control transistor and ground, which keeps the bias control transistor at a bias near its turn-on bias, with a feedback capacitor coupled between the output and the base of the bias control transistor to turn on the bias control transistor when the output rises.