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. 05, 1999
Filed:
Mar. 29, 1996
Applicant:
Inventors:
Ping Xu, Kirkland, WA (US);
John W Kizziar, Seattle, WA (US);
Assignee:
Cypress Semiconductor Corp., San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
H03K / ;
U.S. Cl.
CPC ...
327175 ; 327172 ; 327292 ; 327530 ; 371 61 ;
Abstract
The present invention provides an analog biased pre-driver and pad as well as a duty cycle adjustment cell prior to the pre-driver and pad. The pre-driver and pad may operate in either a 3 volt mode, a 5 volt mode or any voltage in between depending only on the power supply voltage present. No production configuration or post-production configuration is required. The present invention utilizes a special bias circuit to reduce the Vcc, temperature and other processing variations. A duty cycle cell produces a range of duty cycles when the circuit is operating between a 3 volt and 5 volt range.