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:
Mar. 15, 2011
Filed:
Mar. 23, 2009
Dong Zheng, San Jose, CA (US);
Robert L. Lyle, Jr., Raleigh, NC (US);
Barry Harvey, Los Altos, CA (US);
Brian V. North, Los Gatos, CA (US);
Dong Zheng, San Jose, CA (US);
Robert L. Lyle, Jr., Raleigh, NC (US);
Barry Harvey, Los Altos, CA (US);
Brian V. North, Los Gatos, CA (US);
Intersil Americas Inc., Milpitas, CA (US);
Abstract
An apparatus and method for controlling the operation of a utility device, such as a cold cathode fluorescent lamp that is powered in accordance with a pulse width modulation (PWM) signal, includes an analog sensor which monitors the utility device to derive an output signal representative of the PWM signal. An integrating analog-to-digital converter (ADC), which is coupled to the sensor and has its operation synchronized with an integral multiple of the period of the PWM signal, produces an output representative of an average of the output of the utility device.