Card reader with power efficient architecture that includes a power supply and a wake up circuit
First Claim
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1. A card reader, comprising:
- a housing;
a read head positioned in the housing, the read head configured to be coupled to a mobile device, the read head having a slot for swiping a magnetic stripe of a card, the read head configured to produce a first signal indicative of data stored on the magnetic stripe;
wake-up electronics configured to send a wake-up signal to a microcontroller to wake up device electronics of the card reader device from a sleep state to an active state in response to the magnetic stripe being swiped through the read head, the device electronics configured to, in the active state, receive the first signal from the read head and convert the first signal into a second signal;
a power supply coupled to the wake-up electronics and the microcontroller, wherein the microcontroller is configured to wake up the device electronics from the sleep state to the active state and the microcontroller further configured to power down the wake-up electronics when the device electronics transition to the active state and to power up the wake-up electronics when the device electronics return to the sleep state; and
an output jack adapted to be inserted in a port of the mobile device and to deliver through the output jack the second signal to the mobile device.
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Abstract
These and other objects of the present invention are achieved in a card reader with a read head positioned in a housing. The read head 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.
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Citations
29 Claims
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1. A card reader, comprising:
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a housing; a read head positioned in the housing, the read head configured to be coupled to a mobile device, the read head having a slot for swiping a magnetic stripe of a card, the read head configured to produce a first signal indicative of data stored on the magnetic stripe; wake-up electronics configured to send a wake-up signal to a microcontroller to wake up device electronics of the card reader device from a sleep state to an active state in response to the magnetic stripe being swiped through the read head, the device electronics configured to, in the active state, receive the first signal from the read head and convert the first signal into a second signal; a power supply coupled to the wake-up electronics and the microcontroller, wherein the microcontroller is configured to wake up the device electronics from the sleep state to the active state and the microcontroller further configured to power down the wake-up electronics when the device electronics transition to the active state and to power up the wake-up electronics when the device electronics return to the sleep state; and an output jack adapted to be inserted in a port of the mobile device and to deliver through the output jack the second signal 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, 29)
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24. A card reader, comprising:
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a housing; a read head positioned in the housing, the read head configured to be coupled to a mobile device, the read head having a slot for swiping a magnetic stripe of a card, the read head configured to produce a first signal indicative of data stored on the magnetic stripe; wake-up electronics configured to send a wake-up signal to a microcontroller to wake up device electronics of the card reader device from a sleep state to an active state in response to the magnetic stripe being swiped through the read head, the device electronics configured to, in the active state, receive the first signal from the read head and convert the first signal into a second signal, wherein the microcontroller is configured to wake up the device electronics from the sleep state to the active state and the microcontroller further configured to power down the wake-up electronics when the device electronics transition to the active state and to power up the wake-up electronics when the device electronics return to the sleep state; and wherein the second signal sent to the mobile device is at a frequency such that the second signal is an alternating current in relation to the port of the mobile device. - View Dependent Claims (25, 26)
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27. A card reader, comprising:
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a housing; a read head positioned in the housing, the read head configured to be coupled to a mobile device, the read head having a slot for swiping a magnetic stripe of a card, the read head configured to produce a first signal indicative of data stored on the magnetic stripe; wake-up electronics configured to send a wake-up signal to a microcontroller to wake up device electronics of the card reader device from a sleep state to an active state in response to the magnetic stripe being swiped through the read head, the device electronics configured to, in the active state, receive the first signal from the read head and convert the first signal into a second signal, wherein the microcontroller is configured to wake up the device electronics from the sleep state to the active state and the microcontroller further configured to power down the wake-up electronics when the device electronics transition to the active state and to power up the wake-up electronics when the device electronics return to the sleep state; and wherein the microcontroller has a non-volatile memory with a size of 2-8 kbytes, and RAM with a size 128-512 bytes.
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28. A card reader, comprising:
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a housing; a read head positioned in the housing, the read head configured to be coupled to a mobile device, the read head having a slot for swiping a magnetic stripe of a card, the read head configured to produce a first signal indicative of data stored on the magnetic stripe; wake-up electronics configured to send a wake-up signal to a microcontroller to wake up device electronics of the card reader device from a sleep state to an active state in response to the magnetic stripe being swiped through the read head, the device electronics configured to, in the active state, receive the first signal from the read head and convert the first signal into a second signal, wherein the microcontroller is configured to wake up the device electronics from the sleep state to the active state and the microcontroller further configured to power down the wake-up electronics when the device electronics transition to the active state and to power up the wake-up electronics when the device electronics return to the sleep state; and wherein the read head sends a signal to the mobile device at a constant baud rate.
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Specification