Wordline driver with integrated voltage level shift function
First Claim
1. A wordline driver comprising:
- a first logic gate receiving a first clock signal and a decoder output signal and outputting a first wordline control signal, the first clock signal being received from a first timing control block operating at a first voltage level and the first logic gate operating at a second voltage level that is higher than the first voltage level; and
,a second logic gate receiving a second clock signal and the first wordline control signal and outputting a second wordline control signal, the second clock signal being inverted relative to the first clock signal and being output from a second timing control block operating at the first voltage level and the second logic gate operating at the second voltage level.
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Accused Products
Abstract
Disclosed is a wordline driver with an integrated voltage level shift function. This wordline driver receives a decoder output signal from a wordline address decoder operating at first voltage level. Based on the decoder output signal, it generates and outputs a wordline driving signal, which selectively activates or deactivates a selected wordline. To ensure that the selected wordline, when activated, is at a second voltage level that is higher than the first, the wordline driver uses a combination of clock signals received from multiple timing control blocks operating at the first voltage level and multiple logic gates operating the second voltage level. To ensure that this wordline driving signal remains low during power up when fluctuations occur due to the different voltage levels and, specifically, to ensure that the wordline driving signal only switches to high when it will be stable, the wordline driver can include a reset control block.
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Citations
20 Claims
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1. A wordline driver comprising:
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a first logic gate receiving a first clock signal and a decoder output signal and outputting a first wordline control signal, the first clock signal being received from a first timing control block operating at a first voltage level and the first logic gate operating at a second voltage level that is higher than the first voltage level; and
,a second logic gate receiving a second clock signal and the first wordline control signal and outputting a second wordline control signal, the second clock signal being inverted relative to the first clock signal and being output from a second timing control block operating at the first voltage level and the second logic gate operating at the second voltage level. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A wordline driver comprising:
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a first logic gate receiving a first clock signal and a decoder output signal and outputting a first wordline control signal, the first clock signal being received from a first timing control block that is electrically connected to a first voltage rail so as to operate at a first voltage level, and the first logic gate being electrically connected to a second voltage rail so as to operate at a second voltage level that is higher than the first voltage level; a second logic gate receiving a second clock signal and the first wordline control signal and outputting a second wordline control signal, the second clock signal being inverted relative to the first clock signal and being received from a second timing control block that is electrically connected to the first voltage rail so as to operate at the first voltage level, the second logic gate being electrically connected to the second voltage rail so as to operate at the second voltage level, and the second wordline control signal being used to generate a wordline driving signal for activation and deactivation of a selected wordline; and a reset control block electrically connected to the second voltage rail so as to operate at the second voltage level, the reset control block receiving the second wordline control signal and, based on the second wordline control signal, ensuring that the wordline driving signal remains low during power up. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A wordline driver comprising:
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a first logic gate receiving a first clock signal and a decoder output signal and outputting a first wordline control signal, the first clock signal being received from a first timing control block that is electrically connected to a first voltage rail so as to operate at a first voltage level and the first logic gate being electrically connected to a second voltage rail so as to operate at a second voltage level that is higher than the first voltage level; a second logic gate comprising a NOR gate receiving a second clock signal and the first wordline control signal and outputting a second wordline control signal, the second clock signal being inverted relative to the first clock signal and being received from a second timing control block that is electrically connected to the first voltage rail so as to operate at the first voltage level, the second logic gate being electrically connected to the second voltage rail so as to operate at the second voltage level, and the second wordline control signal being used to generate a wordline driving signal for activation and deactivation of a selected wordline; and a reset control block electrically connected to the second voltage rail so as to operate at the second voltage level, the reset control block receiving the second wordline control signal and, based on the second wordline control signal, ensuring that the wordline driving signal remains low during power up. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification