Sensor device including high-resolution analog to digital converter
AssigneeElectronics and Telecommunications Research Institute
InventorJi Man Park
Life of this patent
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Abstract
Provided is a sensor device including: a sensor unit converting a voltage of a periodically switched capacitor into a pulse signal by referring to a clock signal to provide the pulse signal as a first sensing signal; and a high-resolution analog to digital converter (ADC) amplifying a period of the first sensing signal 2n times (n is an integer), amplifying a period of the clock signal 2n−1 times, and generating a second sensing signal where a switching time of the capacitor is removed by removing the amplified clock signal from the amplified first sensing signal.
Claims20
A sensor device comprising:
- a sensor unit converting a voltage of a periodically switched capacitor into a pulse signal by referring to a clock signal to provide the pulse signal as a first sensing signal;
- and
- a high-resolution analog to digital converter (ADC) amplifying a period of the first sensing signal 2n times (n is an integer), amplifying a period of the clock signal 2n−1 times, and generating a second sensing signal where a switching time of the capacitor is removed by removing the amplified clock signal from the amplified first sensing signal.
A sensor device comprising:
- a first sensor unit periodically charging and discharging a first capacitor by referring to a clock signal and converting a voltage of the first capacitor into a pulse signal to provide the pulse signal as a first sensing signal;
- a second sensor unit periodically charging and discharging a second capacitor by referring to the clock signal and converting a voltage of the second capacitor into a pulse signal to provide the pulse signal as a second sensing signal;
- a first high-resolution analog to digital converter (ADC) amplifying a pulse width of the first sensing signal specific times;
- a second high-resolution ADC amplifying a pulse width of the second sensing signal the specific times;
- a first counter converting an output of the first high-resolution ADC as first sensing data;
- a second counter converting an output of the second high-resolution ADC as second sensing data;
- and
- a subtractor removing common mode data of the first sensing data and the second sensing data.
A sensor device comprising:
- a sensor unit periodically charging and discharging a capacitor by referring to a clock signal and converting a voltage of the capacitor into a pulse signal to provide the pulse signal as a first sensing signal;
- and
- a micro control unit performing a high-resolution analog to digital conversion function to amplify a pulse width of the first sensing signal target times, amplify a pulse width of the clock signal the half of the target times, and remove a component corresponding to a discharging time of the capacitor voltage by removing a pulse width of the half-target-times amplified clock signal from the target times amplified first sensing signal to output a removal result as a second sensing signal.
Dependencies are inferred from the claim text.