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:
Sep. 08, 1998
Filed:
Oct. 21, 1996
Alan R Pearlman, Newton Highlands, MA (US);
Mini-Systems, Inc., N. Attleboro, MA (US);
Abstract
An isolation amplifier that transmits data to a receiver via a current loop, where the isolated portion of the circuit is powered by a photovoltaic array illuminated by a light source powered directly by the current loop. Optionally, the photovoltaic array is additionally illuminated by any excess power tapped from the current loop by the non-isolated portion of the circuit. Preferably, the light source is an array of light-emitting diodes. Preferably the photovoltaic array is an array of photocells sensitive to the same wavelengths emitted by the light-emitting diodes. Preferably, there are optical conductors connecting the LED's to the photocells.