Core Engineering Inc.

Motorola Corporation

Georg A Mussenden

Mauricio Bendeck

Alif Khawand

A point of sale device () establishes a short range secure radio link () with a wireless payment device () to complete a transaction. The point of sale device transmits the transaction information to the wireless payment device () so the a user of the wireless payment device can approve the transaction (). Upon approving the transaction, the wireless payment device transmits payment information to the point of sale device (). The point of sale device uses the payment information to contact the appropriate payment source () to record the transaction. Upon the payment source confirming the transaction, the brand of the financial institution, card associations, and affinity groups acting as the payment source is announced so as to be observable by those in the vicinity of the point of sale device.

Payment brand announcement at a wireless payment point of sale device

A current magnitude sensing circuit for detecting a malfunction of a DC brushless fan. The current magnitude sensing circuit detects drops in the current magnitude in windings of a fan motor. Depending on the frequency of the current drops in the fan current, the current magnitude sensing circuit outputs either a high or a low voltage signal. The current magnitude sensing circuit operates by charging a capacitor beyond a certain voltage and thereby providing a high fan fail output signal when a fan is spinning too slowly for proper cooling of a device. Another capacitor is charged at a different time constant for setting the fan fail output of the current magnitude circuit low for indicating that the fan is spinning sufficiently fast.

Current magnitude sensing circuit

A surge suppression circuit for gradually charging a capacitance of a device being hot plugged into a system, such as a disk drive being hot plugged into a RAID system. Without reliance on a permanently turned-on series element, such as a pass transistor, the surge suppression circuit uses a trigger circuit in combination with either a current limiting circuit or a slew rate control circuit. The current limiting circuit relies on a current sensing resistor in combination with a transistor that turns on when a voltage reaches a certain level across the current sensing resistor. The slew rate control circuit relies on a feedback mechanism that includes a capacitor and a resistor for maintaining a substantially constant rate of charging the capacitance of the device being hot plugged.

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Boca Raton, FL, United States of America

Georg A Mussenden