Semiconductor device and battery monitoring system
AssigneeLapis Semiconductor Co., Ltd.
InventorNaoaki Sugimura
Life of this patent
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Abstract
A semiconductor device includes: a boosting section configured to output a second voltage boosted from a first voltage; a voltage lowering section configured to output a lowered voltage that has been lowered from the second voltage by a predetermined voltage; a first buffer amp including a non-inverting input terminal connected to an output of the voltage lowering section; a second buffer amp including a non-inverting input terminal that is input with the first voltage; and a difference output section configured to output a voltage corresponding to a difference between output of the first buffer amp and output of the second buffer amp.
Claims8
A semiconductor device comprising:
- a boosting section configured to output a second voltage boosted from a first voltage;
- a voltage lowering section configured to output a lowered voltage that has been lowered from the second voltage by a predetermined voltage;
- a first buffer amp including a non-inverting input terminal connectable to an output of the voltage lowering section;
- a second buffer amp including a non-inverting input terminal that is connectable to the first voltage;
- and
- a difference output section configured to output a voltage corresponding to a difference between an output of the first buffer amp and an output of the second buffer amp,
- wherein the voltage lowering section includes a constant current source supplying a predetermined current, and a first resistor having one terminal connected to a power source line supplying the second voltage and another terminal connected to the constant current source, and
- the non-inverting input terminal of the first buffer amp is connectable to a node between the first resistor and the constant current source.
Dependencies are inferred from the claim text.