Abstract: A halogen-free resin composition is disclosed comprising a base polymer. In the halogen-free resin composition, the content of a compound including magnesium is equal to or less than 30 parts by mass relative to 100 parts by mass of the base polymer; and the content of a compound including calcium is equal to or less than 30 parts by mass relative to 100 parts by mass of the base polymer. The halogen-free resin composition has an oxygen index of 20 or more. Preferably, the halogen-free resin composition further includes a heavy metal deactivator. Preferably, the base polymer includes a polymer that has a melting point of 120° C.

Abstract: A circuit for a physical quantity detection device includes a drive unit that generates a drive signal that causes an vibrator to vibrate, a detection unit that detects a detection signal outputted from the vibrator based on the drive signal, a passive filter which has a filter characteristic in which a cutoff frequency is lower than a detuning frequency and a cutoff frequency band contains a frequency band higher than the cutoff frequency and to which a signal from the detection unit is inputted, and an amplification unit that amplifies a signal from the passive filter.

Abstract: A pressure sensor includes an insulator having a hollow portion; and a plurality of electrical conductors that have been disposed apart from each other along the inner surface facing the hollow portion of the insulator. The insulator comprises an insulating resin composition made of a material which does not need cross-linking, the plurality of electrical conductors comprise an electroconductive resin composition made of a material which does not need cross-linking, the insulating resin composition and the electroconductive resin composition comprise a process oil, and a mass percentage concentration of the process oil in the electroconductive resin composition is higher than a mass percentage concentration of the process oil in the insulating resin composition.

Abstract: A composite sensor includes a first sensor outputting a first sensor signal, a second sensor outputting a second sensor signal, a circuit board electrically connected to the first and second sensors, and a mount member having one surface on which the first and second sensors and the circuit board are disposed. The first and second sensors have respective input terminals to which respective input signals are inputted, and have respective output terminals from which the first and second sensor signals are outputted. When a virtual straight line passing respective centers of the first and second sensors parallel to an arrangement direction of the sensors is defined, the respective input terminals of the first and second sensors are disposed in one of two regions divided by the virtual line, and the respective output terminals of the first and second sensors are disposed in a remaining one of the two regions.

Abstract: A circuit device includes a control circuit that operates on the basis of a master clock signal, and an interface circuit that includes a register unit and transmits data on the basis of an external clock signal which is input from an external device. In addition, the register unit takes up error information of the master clock signal on the basis of the external clock signal and stores the taken-up error information. The interface circuit transmits the data, including the error information stored in the register unit.

Abstract: A failure determination circuit includes a switching circuit that receives a signal including an output voltage from a temperature sensor and a first reference voltage and outputs the signal in a time division manner, an A/D conversion circuit that A/D converts an output of the switching circuit, and a first determination circuit, and the first determination circuit determines a failure of the temperature sensor based on a signal based on a first digital signal obtained by A/D converting an output voltage from the temperature sensor by the A/D conversion circuit, a signal based on a second digital signal obtained by A/D converting the first reference voltage by the A/D conversion circuit, and temperature characteristics data based on a change in characteristics of the temperature sensor due to temperature and a change in characteristics of the first reference voltage due to temperature.

Abstract: A physical quantity detection circuit includes: a synchronous detection circuit that performs a synchronous detection process on a detection target signal based on a detection signal, the detection target signal including a physical quantity detection signal and a leakage signal from a physical quantity detection element, the physical quantity detection element vibrating based on a drive signal to generate the physical quantity detection signal corresponding to a magnitude of a physical quantity, and the leakage signal of vibrations based on the drive signal; and a phase shift circuit that switches a phase difference between the detection signal and the detection target signal, between a first phase difference and a second phase difference that differs from the first phase difference, so that at least part of the leakage signal is output through the synchronous detection process.

Abstract: A circuit device includes a differential input-to-single-ended output first amplifier, to an inversion input terminal of which, of first and second signals forming differential signals, the first signal is input and to a non-inversion input terminal of which the second signal is input, a differential input-to-single-ended output second amplifier, to a non-inversion input terminal of which the first signal is input and to an inversion input terminal of which the second signal is input, and a failure detection circuit that performs failure detection on the basis of an output signal of the first amplifier and an output signal of the second amplifier.

Abstract: [Problem] To provide: an electroconductive resin composition which can be produced at low cost and is suitable as a material for the electrical conductors of a pressure sensor; and a pressure sensor including electrical conductors constituted of the electroconductive resin composition. [Solution] The present invention provides a pressure sensor (1) which includes an insulator (10) having a hollow portion (13) and a plurality of electrical conductors (11) that have been disposed apart from each other along the inner surface facing the hollow portion (13) of the insulator (10), the plurality of electrical conductors (11) comprising an electroconductive resin composition that includes both a styrene-based thermoplastic elastomer and carbon.

Abstract: A circuit device includes a synchronization detection circuit which performs synchronization detection of a physical quantity signal of an input signal and outputs the physical quantity signal, and a filter unit. The synchronization detection circuit includes first and second detection circuits, and the filter unit includes first and second filters. In a first mode, the physical quantity signal from the first detection circuit is input to the first filter, and the undesired signal from the second detection circuit is input to the second filter. In a second mode, the physical quantity signal from the first detection circuit is input to the first filter and the second filter.

Abstract: A circuit device includes a detection circuit to which first and second detection signals forming differential signals are input from a physical quantity transducer and a diagnosis circuit. The detection circuit includes first and second charge/voltage conversion circuits. The diagnosis circuit includes a first capacitor which is provided between a first node and a first input node to which the first detection signal is input and a second capacitor which is provided between the first node and a second input node to which the second detection signal is input and has a different capacitor value from the first capacitor. In a diagnosis mode, a diagnosis signal is input to the first node.

Abstract: [Problem] To provide: an electroconductive resin composition which can be produced at low cost and is suitable as a material for the electrical conductors of a pressure sensor; and a pressure sensor including electrical conductors constituted of the electroconductive resin composition. [Solution] The present invention provides a pressure sensor (1) which includes an insulator (10) having a hollow portion (13) and a plurality of electrical conductors (11) that have been disposed apart from each other along the inner surface facing the hollow portion (13) of the insulator (10), the plurality of electrical conductors (11) comprising an electroconductive resin composition that includes both a styrene-based thermoplastic elastomer and carbon.

Abstract: A composite sensor includes a first sensor outputting a first sensor signal, a second sensor outputting a second sensor signal, a circuit board electrically connected to the first and second sensors, and a mount member having one surface on which the first and second sensors and the circuit board are disposed. The first and second sensors have respective input terminals to which respective input signals are inputted, and have respective output terminals from which the first and second sensor signals are outputted. When a virtual straight line passing respective centers of the first and second sensors parallel to an arrangement direction of the sensors is defined, the respective input terminals of the first and second sensors are disposed in one of two regions divided by the virtual line, and the respective output terminals of the first and second sensors are disposed in a remaining one of the two regions.

Abstract: A circuit for a physical quantity detection device includes a drive unit that generates a drive signal that causes an vibrator to vibrate, a detection unit that detects a detection signal outputted from the vibrator based on the drive signal, a passive filter which has a filter characteristic in which a cutoff frequency is lower than a detuning frequency and a cutoff frequency band contains a frequency band higher than the cutoff frequency and to which a signal from the detection unit is inputted, and an amplification unit that amplifies a signal from the passive filter.

Abstract: A circuit for a physical quantity detection device includes a drive unit that generates a drive signal that causes an vibrator to vibrate, a detection unit that detects a detection signal outputted from the vibrator based on the drive signal, a passive filter which has a filter characteristic in which a cutoff frequency is lower than a detuning frequency and a cutoff frequency band contains a frequency band higher than the cutoff frequency and to which a signal from the detection unit is inputted, and an amplification unit that amplifies a signal from the passive filter.

Abstract: A circuit device includes a control circuit that operates on the basis of a master clock signal, and an interface circuit that includes a register unit and transmits data on the basis of an external clock signal which is input from an external device. In addition, the register unit takes up error information of the master clock signal on the basis of the external clock signal and stores the taken-up error information. The interface circuit transmits the data, including the error information stored in the register unit.

Abstract: A serial communication circuit includes a receiving unit configured to serially receive input data including a command and a synchronization identification code that is different from the command and a determining unit configured to receive the synchronization identification code from the receiving unit and when the synchronization identification code coincides with a slave selection value, to instruct a start of response processing based on the command.

Abstract: A physical quantity detection circuit includes: a synchronous detection circuit that performs a synchronous detection process on a detection target signal based on a detection signal, the detection target signal including a physical quantity detection signal and a leakage signal from a physical quantity detection element, the physical quantity detection element vibrating based on a drive signal to generate the physical quantity detection signal corresponding to a magnitude of a physical quantity, and the leakage signal of vibrations based on the drive signal; and a phase shift circuit that switches a phase difference between the detection signal and the detection target signal, between a first phase difference and a second phase difference that differs from the first phase difference, so that at least part of the leakage signal is output through the synchronous detection process.

Abstract: [Problem] To provide: an electroconductive resin composition which can be produced at low cost and is suitable as a material for the electrical conductors of a pressure sensor; and a pressure sensor including electrical conductors constituted of the electroconductive resin composition. [Solution] The present invention provides a pressure sensor (1) which includes an insulator (10) having a hollow portion (13) and a plurality of electrical conductors (11) that have been disposed apart from each other along the inner surface facing the hollow portion (13) of the insulator (10), the plurality of electrical conductors (11) comprising an electroconductive resin composition that includes both a styrene-based thermoplastic elastomer and carbon.

Abstract: A circuit device includes a synchronization detection circuit which performs synchronization detection of a physical quantity signal of an input signal and outputs the physical quantity signal, and a filter unit. The synchronization detection circuit includes first and second detection circuits, and the filter unit includes first and second filters. In a first mode, the physical quantity signal from the first detection circuit is input to the first filter, and the undesired signal from the second detection circuit is input to the second filter. In a second mode, the physical quantity signal from the first detection circuit is input to the first filter and the second filter.