Current to voltage converter and current to voltage conversion method
AssigneeNEC Electronics Corporation
InventorYuji Fujita
Life of this patent
Estimating the term…
Abstract
A current to voltage converter that includes a first voltage generator to generate a first voltage according to an input current. a reference voltage generator to output a first reference voltage which is higher than the first voltage, a second voltage generator to generate a second voltage which is lower than the first voltage and fluctuate with a delay in response to a fluctuation in the first voltage, a first comparing unit to compare the first reference voltage with the second voltage and select either the first reference voltage or the second voltage and a second comparing unit to compare the second reference voltage with the first voltage.
Claims20
A current to voltage converter, comprising:
- a first voltage generator to generate a first voltage according to an input current;
- a reference voltage generator to output a first reference voltage which is higher than the first voltage;
- a second voltage generator to generate a second voltage which is lower than the first voltage and fluctuate with a delay in response to a fluctuation in the first voltage;
- a first comparing unit to compare the first reference voltage with the second voltage and select either the first reference voltage or the second voltage;
- and
- a second comparing unit to compare a second reference voltage with the first voltage, said second reference voltage being selected as one of the first reference voltage and the second voltage.
A method for converting from current to voltage, the method comprising:
- generating a first voltage according to an input current;
- outputting a second voltage having a predetermined voltage difference with the first voltage and fluctuating with a delay in response to the first voltage;
- selecting either of a first reference voltage or the second voltage as a second reference voltage based on a first comparing result of the first reference voltage and the second voltage;
- and
- comparing the first voltage with the second reference voltage to output a voltage based on a second comparison result.
A current to voltage converter, comprising:
- a first voltage generator to generate a first voltage which is based on an input current;
- a reference voltage generator to output a first reference voltage which is based on an input voltage of the first voltage generator;
- a second voltage generator to generate a second voltage which is based on the first voltage and fluctuates with a delay in response to a fluctuation in the first voltage;
- a first comparing unit to compare the first reference voltage with the second voltage, and to select one of the first reference voltage and the second voltage;
- and
- a second comparing unit to compare a second reference voltage with the first voltage, said second reference voltage being selected from one of the first reference voltage and the second voltage.
Dependencies are inferred from the claim text.