Reference signal generation for magnetic random access memory devices
First Claim
Patent Images
1. A memory device comprising:
- a block of memory cells;
a first storage device for storing a logic ‘
1’
;
a second storage device for storing a logic ‘
0’
;
a sense amplifier; and
a circuit for generating a reference signal for the sense amplifier, the circuit generating the reference signal by combining outputs of the first and second storage devices.
2 Assignments
0 Petitions
Accused Products
Abstract
A Magnetic Random Access Memory (“MRAM”) device includes an array of memory cells. The device generates reference signals that can be used to determine the resistance states of each memory cell in the array, despite variations in resistance due to manufacturing tolerances and other factors such as temperature gradients across the array, electromagnetic interference and aging.
-
Citations
17 Claims
-
1. A memory device comprising:
-
a block of memory cells;
a first storage device for storing a logic ‘
1’
;
a second storage device for storing a logic ‘
0’
;
a sense amplifier; and
a circuit for generating a reference signal for the sense amplifier, the circuit generating the reference signal by combining outputs of the first and second storage devices. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
-
-
10. A memory device comprising:
-
a block of memory cells;
first and second reference cells for storing first and second logic states, respectively, the first and second reference cells being proximate the memory cells; and
a circuit for generating a reference signal during a read operation on selected memory cells in the block, the circuit generating the reference signal by combining outputs of the first and second reference cells. - View Dependent Claims (11, 12, 13, 14)
-
-
15. A memory device comprising:
-
a block of memory cells;
first and second storage devices for storing first and second logic states, respectively;
a third storage device for storing a logic value of a selected memory cell in the block; and
a circuit for generating a reference signal during a read operation, the circuit generating the reference signal by combining outputs of the first and second storage devices, and comparing the combined output to an output of the third storage device. - View Dependent Claims (16, 17)
-
Specification