Pulse width modulation output type sensor circuit
AssigneeDenso Corporation
InventorYukihiko Tanizawa
Life of this patent
Estimating the term…
Abstract
A sensor circuit includes an analog-to-digital converter, a control circuit, a calculation circuit, and a pulse width modulation converter. The analog-to-digital converter converts an electric signal associated with a detected physical quantity to sensor data by sampling the electric signal a predetermined sampling number times per a predetermined sampling section. The control circuit determines the sampling number based on a magnitude of the electric signal. The calculation circuit calculates an average value of all the sensor data per the sampling section. The pulse width modulation converter generates a pulse width modulation signal having a pulse width corresponding to the average value.
Claims7
A sensor circuit comprising:
- a physical quantity obtaining circuit configured to obtain a first physical quantity detected by a sensor element and configured to output a sensor signal indicative of the first physical quantity;
- a sampling number determination circuit configured to determine a sampling number based on the sensor signal;
- a sampling circuit configured to sample the sensor signal the sampling number times per a predetermined sampling section;
- a calculation circuit configured to calculate an average value of all the sampled sensor signals per the sampling section;
- a pulse width modulation conversion circuit configured to generate a pulse width modulation signal having a pulse width corresponding to the average value;
- and
- an output circuit configured to output the pulse width modulation signal.
Dependencies are inferred from the claim text.