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. 01, 1986
Filed:
Apr. 13, 1984
Ernst H Nordholt, Berkel en Rodenrijs, NL;
Leendert P de Jong, Reeuwijk, NL;
U.S. Philips Corporation, New York, NY (US);
Abstract
A transmitter employing a light-emitting diode as an output element, this element being included in series with a resistor in the output circuit of a difference amplifier the inverting input of which is coupled to the junction point of the diode and resistor, includes a network for compensating for the non-linear output power versus energizing current characteristic of the diode. This network comprises a field effect transistor (fet) biased to operate in the pre-pinch-off region and having its source-drain path connected to the diode. The source-drain path of the FET may shunt the diode and a further resistor in series therewith, or alternatively may be included in a feedback path to the inverting input of the amplifier.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile