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. 20, 2009
Filed:
Jan. 12, 2006
Vaishnav Srinivas, San Diego, CA (US);
Vivek Mohan, San Diego, CA (US);
Vaishnav Srinivas, San Diego, CA (US);
Vivek Mohan, San Diego, CA (US);
QUALCOMM, Incorporated, San Diego, CA (US);
Abstract
A digital output driver includes a pre-driver and a driver that may be implemented with thin-oxide FETs. The pre-driver generates first and second digital signals based on a digital input signal. The first digital signal has a first voltage range determined by a first (e.g., pad) supply voltage and an intermediate voltage. The second digital signal has a second voltage range determined by a second (e.g., core) supply voltage and circuit ground. The driver receives the first and second digital signals and provides a digital output signal having a third voltage range determined by the first supply voltage and circuit ground. The pre-driver may include a latch and a latch driver. The latch stores the current logic value for the digital input signal. The latch driver writes the logic value to the latch. The latch driver is enabled for a short time duration to write the logic value and is turned off afterward.