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:
Jul. 11, 2017
Filed:
Feb. 12, 2016
Nxp B.v., Eindhoven, NL;
Sunil Kasanyal, Pithoragarh, IN;
Kiran Gopal, Bangalore, IN;
NXP B.V., Eindhoven, NL;
Abstract
There is described a driver circuit for a single wire protocol slave unit, the driver circuit comprising (a) at least one current mirror comprising a first transistor (MP, MN) and a second transistor (MP, MN), wherein the gate of both transistors is connected to a bias node (PBIAS, SBIAS), and wherein the second transistor is adapted to conduct a mirror current (I, IOUT) equal to a current (I, I) conducted by the first transistor multiplied by a predetermined factor, (b) a bias transistor (MP, MN) for selectively connecting and disconnecting the bias node to and from a predetermined potential (VDD, GND) in response to a control signal (ABUF, AN), and (c) a current boosting element for providing a boost current (IP, IP) to the bias node for a predetermined period of time when the control signal causes the bias transistor to disconnect the bias node from the predetermined potential. There is also described a universal integrated circuit card device comprising a driver circuit.