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:
Oct. 21, 2003
Filed:
Feb. 19, 2002
William W. Wiles, Jr., Melbourne, FL (US);
Texas Advanced Optoelectric Solutions, Inc., Plano, TX (US);
Abstract
A light to frequency converter includes a temperature coefficient generator, a programmable gain amplifier, and a current controlled oscillator having at least one photodiode configured to receive incident light, the at least one photodiode configured for generating a photodiode control current. The temperature coefficient generator outputs a bandgap reference voltage with temperature coefficient compensation (VBG_TC) in response to a bandgap reference voltage (VBG). The programmable gain amplifier is responsive to the bandgap reference voltage with temperature coefficient compensation (VBG_TC) for outputting an oscillator reference voltage (VREF). Lastly, the current controlled oscillator further includes a switching capacitor configured to provide a feedback current, the current controlled oscillator responsive to the oscillator reference voltage (VREF), the photodiode control current, and the feedback current for producing an output signal having a frequency proportional to an intensity of the incident light, wherein the bandgap reference voltage with temperature coefficient compensation modifies a temperature coefficient of the switched capacitor feedback current to match a temperature coefficient of the photodiode control current. According to another embodiment, the light to frequency converter operates with the use of a bandgap voltage generator, the bandgap generator not including temperature coefficient compensation.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile