Card reader with power efficient architecture that includes a wake-up circuit
First Claim
Patent Images
1. A card reader, comprising:
- a housing;
a card slot positioned within the housing, the card slot comprising a read head configured to be coupled to a mobile device, wherein the read head is configured to read data on a magnetic stripe of a card and produce a raw magnetic signal indicative of data stored on the magnetic stripe;
a power supply coupled to a microcontroller;
an output jack adapted to be inserted in a port of the mobile device and deliver an output jack signal to the mobile device; and
device electronics comprising a control unit, a pathway system, and a fake load, and wherein the pathway subsystem is configured to direct a signal path to the fake load and prevent the mobile device from detecting a disconnect with the card reader during a power cycle of the card reader, and wherein the control unit is configured to set a status bit if a voltage is detected on the fake load indicating the card reader is still connected to the mobile device.
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Abstract
A card reader is provided with a read head with a slot and is configured to be coupled to a mobile device and has a slot for swiping a magnetic stripe of a card. The read head reads data on the magnetic stripe and produces a raw magnetic signal indicative of data stored on the magnetic stripe. A power supply is coupled to wake-up electronics and a microcontroller. An output jack is adapted to be inserted in a port of the mobile device and deliver an output jack signal to the mobile device. The wake-up electronics is powered by a microphone bias of a mobile device.
318 Citations
30 Claims
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1. A card reader, comprising:
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a housing; a card slot positioned within the housing, the card slot comprising a read head configured to be coupled to a mobile device, wherein the read head is configured to read data on a magnetic stripe of a card and produce a raw magnetic signal indicative of data stored on the magnetic stripe; a power supply coupled to a microcontroller; an output jack adapted to be inserted in a port of the mobile device and deliver an output jack signal to the mobile device; and device electronics comprising a control unit, a pathway system, and a fake load, and wherein the pathway subsystem is configured to direct a signal path to the fake load and prevent the mobile device from detecting a disconnect with the card reader during a power cycle of the card reader, and wherein the control unit is configured to set a status bit if a voltage is detected on the fake load indicating the card reader is still connected to the mobile device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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Specification