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:
Aug. 03, 2004
Filed:
Jan. 13, 2002
Samuel W. Sheng, Los Gatos, CA (US);
Ivan C. Eng, Santa Clara, CA (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
A precision analog exponentiation circuit includes a precision analog exponentiation circuit includes a first transistor coupled to a reference current for generating a voltage at the first transistor, a second transistor coupled to the first transistor for generating an output current, a variable current source coupled to the first transistor and the second transistor for generating a sum of the reference current and the output current in response to a feedback signal, and a feedback amplifier coupled to the first transistor for generating the feedback signal wherein the variable current source maintains the voltage at the first transistor substantially equal to a reference voltage so that the output current is substantially equal to an exponential function of a control voltage coupled to the first transistor and the second transistor.