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:
Apr. 07, 2009
Filed:
Dec. 07, 2006
Mohammad Mojarradi, La Canada, CA (US);
Greg Levanas, Costa Mesa, CA (US);
Yuan Chen, Pasadena, CA (US);
Raymond S. Cozy, Altadena, CA (US);
Robert Greenwell, Knoxville, TN (US);
Stephen Terry, Knoxville, TN (US);
Benjamin J. Blalock, Knoxville, TN (US);
Mohammad Mojarradi, La Canada, CA (US);
Greg Levanas, Costa Mesa, CA (US);
Yuan Chen, Pasadena, CA (US);
Raymond S. Cozy, Altadena, CA (US);
Robert Greenwell, Knoxville, TN (US);
Stephen Terry, Knoxville, TN (US);
Benjamin J. Blalock, Knoxville, TN (US);
California Institute of Technology, Pasadena, CA (US);
Abstract
The present invention relates to a reference current circuit. The reference circuit comprises a low-level current bias circuit, a voltage proportional-to-absolute temperature generator for creating a proportional-to-absolute temperature voltage (VPTAT), and a MOSFET-based constant-IC regulator circuit. The MOSFET-based constant-IC regulator circuit includes a constant-IC input and constant-IC output. The constant-IC input is electrically connected with the VPTAT generator such that the voltage proportional-to-absolute temperature is the input into the constant-IC regulator circuit. Thus the constant-IC output maintains the constant-IC ratio across any temperature range.