Physical quantity measurement apparatus
AssigneeAsahi Kasei Microdevices Corporation
InventorTomohiro YOSHIOKA
Life of this patent
Estimating the term…
Abstract
Provided is a physical quantity measurement apparatus, comprising: an element with a bridge resistor, which outputs an analog signal representing physical quantities to be measured according to a flow of a driving current; an AD converter which converts the analog signal output from the element into a digital signal; a current mirror circuit which duplicates the driving current flowing through the element as a duplicated current; and a generation circuit which generates a reference voltage in order to output the duplicated current to the AD converter by current-to-voltage conversion.
Claims10
A physical quantity measurement apparatus, comprising:
- an element with a bridge resistor, which outputs an analog signal representing physical quantities to be measured according to a flow of a driving current;
- an AD converter which converts the analog signal output from the element into a digital signal;
- a current mirror circuit which duplicates the driving current flowing through the element as a duplicated current;
- and
- a generation circuit which generates a reference voltage to be output to the AD converter by performing current-to-voltage conversion on the duplicated current.
A reference voltage generation apparatus comprising:
- an AD converter which converts an analog signal output from an element with a bridge resistor that outputs the analog signal representing physical quantities to be measured according to a flow of a driving current, into a digital signal;
- and
- a generation circuit which generates a reference voltage to be output to the AD converter, by performing current-to-voltage conversion on the duplicated current output from a current mirror circuit that duplicates the driving current flowing through the element as a duplicated current.
A sensor comprising:
- an element with a bridge resistor, which outputs an analog signal representing physical quantities to be measured according to a flow of a driving current;
- a current mirror circuit which duplicates the driving current flowing through the element as a duplicated current;
- and
- an output unit which outputs the duplicated current toward a generation circuit which generates a reference voltage to be output to the duplicated current by performing current-to-voltage conversion on the AD converter.
Dependencies are inferred from the claim text.