Patent ID: 7938329
Filing Date: 2011-05-10
Classification: G06K

Abstract:
1. A smart card device, comprising: a card body; a plurality of card contacts carried by the card body and adapted to be connected to a smart card reader when the card body is received within a smart card reader; a smart card integrated circuit comprising a processor carried by said card body and operably connected to said contacts and comprising at least one memory for storing a set of instructions relating to initiating and completing smart card transactions between the smart card device and a smart card host and further comprising a power circuit connected to a first contact and configured to draw power therefrom; and a biometric circuit carried by the card body and operable with said processor and used for verifying identity of a user for subsequent smart card device usage, and further comprising a biometric subsystem power circuit connected to a second contact and power is received through said second contact without drawing power from the first contact, wherein said smart card integrated circuit is configured to transmit an Answer to Reset signal that is used to determine a voltage required to power the biometric circuit.