1. A merchandise display security device for an article of merchandise comprising:
an alarm unit;
a first connector electrically coupled to the alarm unit and configured to releasably engage the article of merchandise; and
a second connector electrically coupled to the alarm unit, the second connector configured to releasably engage an original equipment manufacturer power supply cable such that the alarm unit is disposed between a source of electric power and the article of merchandise, and the original equipment manufacturer power supply cable is configured to provide power to both the alarm unit and the article of merchandise, and
wherein the alarm unit is configured to activate an alarm in the event that the first connector is removed from the article of merchandise and activate an alarm in the event that the second connector is removed from the original equipment manufacturer power supply cable.
2. The merchandise display security device according to claim 1, wherein the second connector is configured to releasably engage the original equipment manufacturer power supply cable.
3. The merchandise display security device according to claim 1, wherein the alarm unit comprises a body having an attachment side configured for attachment to the article of merchandise, the attachment side having a recess defined therein.
4. The merchandise display security device according to claim 3, wherein the second connector is inaccessible when the attachment side of the body is attached to the article of merchandise.
5. The merchandise display security device according to claim 3, wherein the second connector is disposed within the recess.
6. The merchandise display security device according to claim 3, wherein the recess is adapted to receive a portion of the original equipment manufacturer power supply cable therein.
7. The merchandise display security device according to claim 1, wherein each of the first connector and the second connector is a micro-USB connector.
8. The merchandise display security device according to claim 1, wherein the first connector is electrically coupled to a power adaptor cable at a first end thereof, and wherein a second end of the power adaptor cable is electrically coupled to the alarm unit.
9. The merchandise display security device according to claim 1, further comprising a lanyard electrically coupled to the alarm unit at a first end, and wherein the second connector is disposed at a second end of the lanyard.
10. The merchandise display security device of claim 9, wherein the lanyard is configured to releasably engage the original equipment manufacturer power supply cable at a location inaccessible to a customer.
11. The merchandise display security device according to claim 1, wherein the first and second connectors are the same type.
12. A method for securing an article of merchandise from theft, the method comprising:
providing an alarm unit comprising a first connector and a second connector each electrically coupled to the alarm unit;
coupling the article of merchandise to the first connector; and
coupling the second connector to an original equipment manufacturer power supply cable such that the alarm unit is disposed between a source of electric power and the article of merchandise, and the original equipment manufacturer power supply cable is configured to provide power to both the alarm unit and the article of merchandise,
wherein the alarm unit is configured to activate an alarm in the event that the first connector is removed from the article of merchandise and activate an alarm in the event that the second connector is removed from the original equipment manufacturer power supply cable.
13. The method according to claim 12, wherein coupling the second connector comprises releasably attaching the second connector to the original equipment manufacturer power supply cable.
14. The method according to claim 12, wherein the first connector is electrically coupled to a power adaptor cable at a first end thereof, and wherein coupling the first connector comprises coupling the power adapter cable to the article of merchandise via the first connector so as to couple the alarm unit to the article of merchandise.
15. The method according to claim 12, further comprising releasably engaging a lanyard to the original equipment manufacturer power supply cable via the second connector.
16. The method according to claim 15, wherein releasably engaging comprises releasably engaging the original equipment manufacturer power supply cable to the lanyard at a location inaccessible to a customer.
17. The method according to claim 12, further comprising attaching the article of merchandise to the alarm unit such that the second connector is inaccessible to a customer.
18. A merchandise display security device for an article of merchandise comprising:
an alarm unit configured to be attached to an article of merchandise;
a first connector electrically coupled to the alarm unit and configured to releasably engage the article of merchandise; and
a second connector electrically coupled to the alarm unit, the second connector configured to releasably engage an original equipment manufacturer power supply cable such that the alarm unit is disposed between a source of electric power and the article of merchandise, and the original equipment manufacturer power supply cable is configured to provide power to both the alarm unit and the article of merchandise, and
wherein the alarm unit is configured to activate an alarm in the event that the second connector is removed from the original equipment manufacturer power supply cable.
19. The merchandise display security device of claim 18, wherein the second connector is disposed on the alarm unit or disposed on an end of a lanyard attached to the alarm unit.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A method comprising:
increasing a threshold voltage range of a multilevel memory cell without using a negative voltage pump.
2. The method of claim 1 including applying a positive voltage to read the cell.
3. The method of claim 2 including applying a boost voltage to an output of a sense amplifier.
4. The method of claim 2 including pre-charging a bitline.
5. The method of claim 1 including applying a voltage to said cell using a buffer.
6. The method of claim 5 including correcting for a non-ideal characteristics of said buffer.
7. The method of claim 6 including subtracting a voltage on a source of the selected cell from a source reference voltage to create a difference.
8. The method of claim 7 including adding the difference to a reference voltage applied to said buffer.
9. The method of claim 1 including providing a bitline voltage generator to create a reference voltage applied to a sense amplifier.
10. The method of claim 9 including developing a current in said generator that is equal to a bitline clamp voltage applied to said generator divided by a first resistance in said generator, said reference voltage to said sense amplifier being equal to the bitline clamp reference voltage times a ratio of a second resistance to said first resistance plus a source voltage on said cell.
11. An apparatus comprising:
a multilevel memory cell having a source, drain, and gate; and
a bias circuit to apply a positive voltage to the source of said cell during reading.
12. The apparatus of claim 11 including a buffer to supply a word line voltage to the gate of said cell.
13. The apparatus of claim 12 including a subtracter coupled to the source of said cell, said subtracter to subtract a source reference voltage from said source voltage and to apply the difference to an adder, said adder coupled to said buffer.
14. The apparatus of claim 11 including a circuit to correct for non-ideal characteristics of a buffer coupled to the gate of said multilevel cell.
15. The apparatus of claim 11 including a sense amplifier coupled to the drain of said cell, said sense amplifier having an output coupled through a capacitor to a boost voltage, said boost voltage applied to a bitline when reading a cell on said bitline.
16. The apparatus of claim 15 including an inverter coupled to said capacitor, said boost voltage being sufficient to enable said inverter to switch when the cell is conducting even with said positive voltage applied to its source.
17. The apparatus of claim 11 including a bitline clamp generator coupled to said sense amplifier, said sense amplifier being a cascode transistor.
18. The apparatus of claim 17, said bitline clamp generator to supply a reference voltage to the gate of said cascode transistor that is equal to a ratio of resistances of resistors in said bitline clamp generator times a reference voltage applied to said bitline clamp generator plus the source voltage on said cell.
19. A method comprising:
reading a multilevel cell using a sense amplifier; and
applying a boost voltage to an output of said sense amplifier to enable an inverter coupled to said sense amplifier to shift, a source of a selected cell being biased so that without said boost voltage, the inverter will not switch when reading a conducting cell.
20. The method of claim 19 including applying a voltage to a gate of the cell using a buffer and correcting for a non-ideal characteristic of said buffer.
21. The method of claim 20 including subtracting a voltage on the source of a selected cell from a source reference voltage to create a difference and adding the difference to a reference voltage applied to said buffer.
22. The method of claim 19 including providing a bitline voltage generator to create a reference voltage applied to said sense amplifier.
23. The method of claim 22 including developing a current in said generator that is equal to a bitline clamp voltage applied to said generator divided by a first resistance in said generator, said reference voltage to said sense amplifier being equal to the bitline clamp reference voltage times a ratio of a second resistance to said first resistance plus the source voltage on said cell.
24. An apparatus comprising:
a non-volatile memory cell having a gate, source, and drain;
a buffer coupled to the gate of said cell; and
a circuit coupled to said cell and said buffer to correct for a non-ideal characteristic of said buffer.
25. The apparatus of claim 24, said circuit including a subtracter coupled to said source, said subtracter to subtract a source reference voltage from said source voltage and to apply the difference to an adder, said adder coupled to the input of said buffer.
26. The apparatus of claim 25, said drain coupled to a bitline, said bitline coupled to a cascode transistor.
27. The apparatus of claim 26 including a capacitor coupled to the sense amplifier output, said sense amplifier output coupled to a boost voltage, said sense amplifier coupled to an inverter, said boost voltage to switch said inverter when said cell is conducting.
28. The apparatus of claim 24 wherein said cell is a flash cell.
29. The apparatus of claim 28 wherein said cell is a NAND flash cell.
30. The apparatus of claim 24 wherein said cell is a phase change memory cell.