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. 15, 2021
Filed:
Mar. 17, 2020
Analog Devices International Unlimited Company, Limerick, IE;
Andrew J. Gardner, Santa Barbara, CA (US);
Heath Stewart, Santa Barbara, CA (US);
Gitesh Bhagwat, San Diego, CA (US);
Analog Devices International Unlimited Company, Limerick, IE;
Abstract
A PoDL system uses a gyrator for DC coupling of DC power from a PSE to a wire pair, and/or decoupling DC power from a wire pair for a PD. The gyrators obviate the use of discrete inductors for DC-coupling/decoupling and can be formed as an integrated circuit. The gyrators use a small integrated capacitor and invert and multiply the capacitor effect to emulate an inductor. The gyrators present a high impedance to AC current and a low impedance to DC current. Various gyrator designs, such as positive and negative polarity gyrators, and configurations are disclosed. Gyrators are described with analog current limit and power switch control, so multiple functions are integrated on the same IC chip.