Stephen P Terry

US Patent:

7514998, Apr 7, 2009

Filed:

Dec 7, 2006

Appl. No.:

11/636365

Inventors:

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

Assignee:

California Institute of Technology - Pasadena CA

International Classification:

H03F 3/45
H01L 35/00
G05F 3/02

US Classification:

330256, 327513, 327539

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.