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. 06, 1996
Filed:
Aug. 22, 1995
James R Kuo, Cupertino, CA (US);
National Semiconductor Corp., Santa Clara, CA (US);
Abstract
A temperature compensation circuit is disclosed that includes a first field-effect transistor (FET), a second FET, a resistor, and current generating circuitry. The second FET has a larger current conducting channel than the current conducting channel of the first FET, and the gate of the second FET is coupled to the gate of the first FET. The resistor is coupled between a first node that is common with the source of the first FET and a second node that is common with the source of the second FET. The current generating circuitry generates and maintains substantially equal drain currents in the first and second FETs. In an alternative embodiment, a positive temperature coefficient current generation stage that includes a first FET causes a first current conducted by the channel of the first FET to increase when temperature increases and decrease when temperature decreases, and a programmable current transfer and modification stage generates a third current that may be selectively programmed to be any one of a plurality of values that are linearly proportional to the first current conducted by the channel of the first FET.