Level shifter using coupling phenomenon
AssigneeHynix Semiconductor Inc.
InventorSaeng Hwan Kim
Life of this patent
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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.
Claims24
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.
A level shifter comprising:
- 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.
A level shifter comprising:
- 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.
A level shifter comprising:
- 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.
Dependencies are inferred from the claim text.