Input circuit and method
AssigneeSamsung Electronics Co., Ltd.
InventorIn-Chul Jeong
Life of this patent
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Abstract
We describe an input circuit and method. The input circuit includes a variable reference level generator that increases a level of a reference signal in proportion to a time when an input signal transits from a low level to a high level and decreases the level of the reference signal in proportion to a time when the input signal transits from a high level to a low level. An analyzer compares the level of the input signal with the level of the reference signal, determines the level of the input signal, and outputs a signal based on the comparison. The input circuit and method widen the minimum difference between the input and reference signal to facilitate analysis of the input signal.
Claims18
An input circuit comprising:
- a variable reference level generator that increases a level of a reference signal in proportion to lapse of time when an input signal transits from a low level to a high level and decreases the level of the reference signal in proportion to lapse of time when the input signal transits from a high level to a low level;
- and
- an analyzer that compares the level of the input signal with the level of the reference signal, determines the level of the input signal, and outputs an output signal based on the result of the determination.
A method comprising:
- generating a variable voltage reference signal;
- comparing an input signal with the variable voltage reference signal;
- and
- generating an output signal responsive to the comparing.
Dependencies are inferred from the claim text.