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. 11, 2015
Filed:
Jun. 09, 2012
Cristiano Bazzani, Irvine, CA (US);
Fabio Gozzini, Newport Beach, CA (US);
Tao Chen, Irvine, CA (US);
Cristiano Bazzani, Irvine, CA (US);
Fabio Gozzini, Newport Beach, CA (US);
Tao Chen, Irvine, CA (US);
Mindspeed Technologies, Inc., Newport Beach, CA (US);
Abstract
A current driver circuit, for driving a light source, that provides high accuracy and reduced power consumption is disclosed. The driver includes a digital to analog converter configured to receive a digital value representing a light intensity and convert the digital value to an analog current signal. A current mirror is configured to receive the analog current signal and create a current mirror output which is larger than the analog current signal based on a ratio of the current mirror. This results in a modified analog current signal. A light source receives the modified analog current signal, and responsive thereto generate a light signal such that the light signal has an intensity controlled by the digital value. One or more amplifiers are also part of the current driver and configured to increase response time and accuracy.