Comparator circuit
AssigneeRohm Co., Ltd.
InventorsAkio SASABE, Daiki YANAGISHIMA
Life of this patent
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Abstract
A comparator circuit includes a first comparator configured to receive input of an input signal and a comparison target signal to be compared with the input signal, a first output stage including an N-channel transistor having a control terminal to which a first control terminal voltage output from the first comparator is applied, and a first clamp unit configured to limit the first control terminal voltage to be not higher than a first predetermined voltage that is higher than a first threshold voltage of the N-channel transistor but is lower than a first high side voltage output as high level from the first comparator when the first control terminal voltage is not limited.
Claims13
A comparator circuit, comprising:
- a first comparator configured to receive input of an input signal and a comparison target signal to be compared with the input signal;
- a first output stage including an N-channel transistor having a control terminal to which a first control terminal voltage output from the first comparator is applied;
- and
- a first clamp unit configured to limit the first control terminal voltage to be not higher than a first predetermined voltage that is higher than a first threshold voltage of the N-channel transistor but is lower than a first high side voltage output as high level from the first comparator when the first control terminal voltage is not limited.
A comparator circuit, comprising:
- a second comparator configured to receive input of an input signal and a comparison target signal to be compared with the input signal;
- a second output stage including a P-channel transistor having a control terminal to which a second control terminal voltage output from the second comparator is applied;
- and
- a second clamp unit configured to limit the second control terminal voltage to be not lower than a second predetermined voltage that is lower than a third threshold voltage lower, by a second threshold voltage of the P-channel transistor, than a second high side voltage output as high level from the second comparator but is higher than a low level voltage output as low level from the second comparator when the second control terminal voltage is not limited.
Dependencies are inferred from the claim text.