Physical Quantity Detection Circuit And Physical Quantity Detection Device

Original (Chinese)

A physical quantity detection circuit includes: a physical quantity detection signal output circuit that includes an amplifier circuit that amplifies a signal output from a physical quantity detection element, and outputs a physical quantity detection signal corresponding to a physical quantity; a failure diagnosis signal output circuit that outputs a failure diagnosis signal based on a signal output from at least one of a plurality of amplifiers included in the amplifier circuit; a failure diagnosis circuit that performs failure diagnosis based on the failure diagnosis signal and outputs a failure flag indicating a result of the failure diagnosis; a mask signal output circuit that compares a level of a signal output from each of the plurality of amplifiers with each of a plurality of set detection levels and outputs a mask signal based on a result of the comparison; and a disabling determination circuit that disables the failure flag based on the mask signal.