Comparator circuit and signal comparison method
AssigneeSK hynix Inc.
InventorKi-Han Kim
Life of this patent
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Abstract
A comparator circuit includes a first comparator configured to store an offset during a first period, and to compare first and second input signals while compensating for the stored offset to generate a first comparison signal during a second period, a second comparator configured to compare the first and second input signals while compensating for an offset to generate a second comparison signal, and a compensation amount controller configured to control an offset compensation amount of the second comparator when the first and second comparison signals have different values.
Claims22
A comparator circuit comprising:
- a first comparator configured to store an offset during a first period and to compare first and second input signals while compensating for the stored offset to generate a first comparison signal during a second period;
- a second comparator configured to compare the first and second input signals while compensating for an offset to generate a second comparison signal;
- and
- a compensation amount controller configured to control an offset compensation amount of the second comparator when the first and second comparison signals have different values.
A comparator circuit comprising:
- a first comparator configured to determine the level of a first bias voltage during a first period and to generate a first comparison signal by comparing first and second input signals using the first bias voltage during a second period;
- a second comparator configured to generate a second comparison signal by comparing the first and second input signals using a second bias voltage;
- and
- a bias controller configured to control the level of the second bias voltage when the first and second comparison signals have different values.
A signal comparison method comprising:
- storing a first offset;
- comparing a first input signal and a second input signal with compensating for the stored first offset to generate a first comparison signal;
- comparing the first and second input signals while compensating for a second offset to generate a second comparison signal;
- and
- controlling a compensation amount of the second offset when the first and second comparison signals have different values.
Dependencies are inferred from the claim text.