A physical quantity detection circuit includes: a detection signal generation circuit generating a detection signal, based on an output signal from a physical quantity detection element; an analog/digital converter circuit converting the detection signal into a first digital signal and converting a test signal into a second digital signal; a test signal generation circuit generating the test signal; and a malfunction diagnosis circuit diagnosing a malfunction of the analog/digital converter circuit, based on the second digital signal. A full-scale voltage of the analog/digital converter circuit is selected from among a plurality of voltages having different magnitudes, according to a power supply voltage. The test signal includes an upper limit value test signal, a lower limit value test signal, and a first intermediate value test signal. The test signal generation circuit performs resistive voltage division of the full-scale voltage and thus generates the first intermediate value test signal.
Physical Quantity Detection Circuit, Physical Quantity Sensor, Electronic Apparatus, Vehicle, And Method For Malfunction Diagnosis On Physical Quantity Sensor
2020-12-31
Patent
Elektronische Ressource
Englisch
Europäisches Patentamt | 2023
|Europäisches Patentamt | 2018
|Physical quantity sensor, physical quantity sensor device, electronic apparatus, and vehicle
Europäisches Patentamt | 2020
|PHYSICAL QUANTITY SENSOR, PHYSICAL QUANTITY SENSOR DEVICE, ELECTRONIC APPARATUS, AND VEHICLE
Europäisches Patentamt | 2018
|Europäisches Patentamt | 2020
|