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:
Dec. 11, 2012
Filed:
Mar. 18, 2011
Gururaj Ghorpade, Bangalore, IN;
Theertham Srinivas, Bangalore, IN;
D V J Ravi Kumar, Bangalore, IN;
Mehmet Aslan, Sunnyvale, CA (US);
K. Krishna Mahesh, Bangalore, IN;
Gururaj Ghorpade, Bangalore, IN;
Theertham Srinivas, Bangalore, IN;
D V J Ravi Kumar, Bangalore, IN;
Mehmet Aslan, Sunnyvale, CA (US);
K. Krishna Mahesh, Bangalore, IN;
National Semiconductor Corporation, Santa Clara, CA (US);
Abstract
A rail-to-rail buffer receiving a differential input signal and generating a differential output signal includes first and second amplifier circuits configured in a pseudo differential buffer structure and first and second comparators coupled to compare the respective part of the differential input signal and a first voltage and to generate select signals. Each of the first and second amplifier circuits includes first and second complementary differential input stages and the first and second comparators generate respective select signals to turn on only one of the first or the second differential input stage in each amplifier circuit depending on a value of the respective part of the differential input signal. In operation, the first and second complementary differential input stages of each amplifier circuit not being turned on at the same time.