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:
Jun. 18, 2002
Filed:
Oct. 27, 2000
Parviz Ghaseminejad, Framingham, MA (US);
PowerSmart, Inc., Needham, MA (US);
Abstract
An opto-isolator circuit for providing isolation between a bi-directional, I2C transmission line and a pair of single-direction transmission lines. The opto-isolator circuit includes a bi-directional port for receiving data from, and providing data to, the bi-directional transmission line. The circuit further includes an output path that has (i) a first buffer for receiving outgoing data from the bi-directional port, (ii) a first opto-isolator for receiving the outgoing data from an output of the first buffer, and (iii) a second buffer for receiving the outgoing data from an output of the first opto-isolator and providing the outgoing data to an output port. The circuit also includes an input path, that has (i) a third buffer for receiving incoming data from an input port, (ii) a second opto-isolator for receiving the incoming data from an output of the third buffer, and (iii) a fourth buffer for receiving the incoming data from an output of the second opto-isolator. The fourth buffer provides the incoming data to the bi-directional port such that characteristics of the incoming data are compatible with I2C characteristics.