Row decoder circuit for use in non-volatile memory device
View Patent ↗The invention disclosed herein is a non-volatile memory device. The non-volatile memory device comprises: a first transistor connected between a first voltage and a control node, and controlled by a second voltage; a second transistor connected between the first voltage and the control node, and controlled by a third voltage, and a word line driver for driving a word line in responsive to a voltage of the control node. The second voltage is set to a ground voltage during an erase operation. The third voltage is set to a power voltage during the erase operation.
1. A row decoder circuit for use in a non-volatile memory device capable of operating in read, program, and erase modes, comprising:
a first transistor connected between a first voltage and a control node, and controlled by a second voltage;
a second transistor connected between the first voltage and the control node, and controlled by a third voltage; and
a word line driver for driving a word line responsive to a voltage of the control node,
wherein during an erase operation, the second voltage is set to a ground voltage and the third voltage is set to a power voltage.
2. The row decoder circuit of claim 1 , wherein the third voltage is set to the ground voltage during residual operations except the erase operation.
3. The row decoder circuit of claim 1 , further comprising a switch for connecting the control node to one of the ground voltage and the power voltage responsive to selection signals during read and program operations.
4. The row decoder circuit of claim 3 , wherein the switch comprises a first switch transistor connected in series with a second switch transistor.
5. The row decoder circuit of claim 1 , wherein the first transistor is a PMOS transistor, and the second transistor is a NMOS transistor.
6. The row decoder circuit of claim 1 , wherein the first voltage is set to a ground voltage, 10V, and 5V during the erase operation, the program operation, and the read operation, respectively.
7. The row decoder circuit of claim 1 , wherein the second voltage is set to a ground voltage during the read operation, and wherein the second voltage is set to a voltage lower than the first voltage during the program operation.
8. A method of operating a row decoder circuit for use in a non-volatile memory device, comprising:
controlling a first transistor, the first transistor connected between a first voltage and a control node, by a second voltage;
controlling a second transistor, the second connected between the first voltage and the control node, by a third voltage;
driving a word line responsive to a voltage of the control node;
setting the second voltage to a ground voltage during a read operation; and
setting the second voltage to a voltage lower than the first voltage during a program operation.
9. The method of claim 8 , during an erase operation, comprising:
setting the second voltage to a ground voltage; and
setting the third voltage to a power voltage.
10. The method of claim 8 , during read and program operations, comprising:
connecting the control node to one of the ground voltage and the power voltage responsive to selection signals.
11. The method of claim 8 , comprising:
setting the third voltage to the ground voltage during residual operations except the erase operation.
12. The method of claim 8 , comprising setting the first voltage to a ground voltage, 10V, and 5V during an erase operation, a program operation, and a read operation, respectively.
13. A row decoder circuit for use in a non-volatile memory device capable of operating in read, program, and erase modes, comprising:
a first PMOS transistor connected between a first voltage and a control node, and controlled by a second voltage;
a second NMOS transistor connected between the first voltage and the control node, and controlled by a third voltage; and
a word line driver for driving a word line responsive to a voltage of the control node.
14. The row decoder circuit of claim 13 , wherein during an erase operation, the second voltage is set to a ground voltage and the third voltage is set to a power voltage.
15. The row decoder circuit of claim 13 , wherein the third voltage is set to the ground voltage during residual operations except the erase operation.
16. The row decoder circuit of claim 13 , further comprising a switch for connecting the control node to one of the ground voltage and the power voltage responsive to selection signals during read and program operations.
17. The row decoder circuit of claim 16 , wherein the switch comprises a first switch transistor connected in series with a second switch transistor.
18. The row decoder circuit of claim 13 , wherein the first voltage is set to a ground voltage, 10V, and 5V during the erase operation, the program operation, and the read operation, respectively.
19. The row decoder circuit of claim 13 , wherein the second voltage is set to a ground voltage during the read operation, and wherein the second voltage is set to a voltage lower than the first voltage during the program operation.