Level shifter using coupling phenomenon
First Claim
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1. A level shifter comprising:
- a coupling unit for setting up a voltage level of a first node according to a voltage level of an input signal;
a first buffer for transferring an output signal by buffering a signal from the first node; and
a driving unit for receiving the input signal and the output signal and drive the first node.
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Abstract
A level shifter removes delay, which is generated at the time of transition of an input signal level, by adjusting a size of NMOS transistors to perform pull-down and pull-up operations. The level shifter includes a coupling unit for setting up a voltage level of a first node according to a voltage level of an input signal, a first buffer for transferring an output signal by buffering a signal from the first node, and a driving unit configured to receive the input signal and the output signal and drive the first node.
8 Citations
24 Claims
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1. A level shifter comprising:
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a coupling unit for setting up a voltage level of a first node according to a voltage level of an input signal; a first buffer for transferring an output signal by buffering a signal from the first node; and a driving unit for receiving the input signal and the output signal and drive the first node. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A level shifter comprising:
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a first buffer for buffering an input signal and transferring the buffered input signal to a first node; a coupling element connected between the first node and a second node and configured to maintain a constant voltage difference between the first node and the second node; a pull-down element for pull-down driving the second node in response to the input signal; a second buffer for outputting an output signal by buffering a signal from the second node; and a pull-up element for pull-up driving the second node in response to the output signal. - View Dependent Claims (11, 12, 13, 14)
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15. A level shifter comprising:
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a first buffer for buffering an input signal and transferring the buffered input signal to a first node; a coupling element connected between the first node and a second node and configured to maintain a constant voltage difference between the first node and the second node; a pull-up element for pull-up driving the second node in response to the input signal; a second buffer for outputting an output signal by buffering a signal from the second node; and a pull-down element for pull-up driving the second node in response to the output signal. - View Dependent Claims (16, 17, 18, 19)
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20. A level shifter comprising:
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a set-up unit for setting up a voltage level of a first node according to an input signal; a first buffer for transferring an output signal by buffering a signal from the first node; and a pull-up element for pull-up driving the first node in response to the output signal. - View Dependent Claims (21, 22, 23, 24)
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Specification