Abstract: A circuit device includes a drive circuit which drives a vibrating reed; a detection circuit which outputs physical quantity information corresponding to the physical quantity, based on a detection signal according to a physical quantity that is output from the vibrating reed; and an arithmetic processing unit which performs arithmetic processing, based on the physical quantity information from the detection circuit and time interval information that is defined by a drive frequency of the drive circuit.

Abstract: An integrated circuit device includes: a first oscillation circuit that oscillates a first resonator to generate a first clock signal with a first clock frequency; a second oscillation circuit that oscillates a second oscillation element to generate a second clock signal with a second clock frequency that is different from the first clock frequency; and a time-to-digital conversion circuit that converts a time into a digital value using the first and second clock signals.

Abstract: A time-to-digital converter includes a clock signal generation circuit that generates a first cycle signal having a voltage level that monotonously increases or decreases in a cycle corresponding to the clock frequency of a reference clock signal and further generates a first clock signal based on a first signal and the first cycle signal, a clock signal generation circuit that generates a second cycle signal having a voltage level that monotonously increases or decreases in a cycle corresponding to the clock frequency of a reference clock signal and further generates a second clock signal based on a second signal and the second cycle signal, and a processing circuit that converts a time difference between the transition timing of the first signal and the transition timing of the second signal into a digital value based on the first and second clock signals.

Abstract: A time-to-digital converter includes a first oscillation circuit that starts oscillating at the transition timing of a first signal and generates a first clock signal having a first clock frequency, a second oscillation circuit that starts oscillating at the transition timing of a second signal and generates a second clock signal having a second clock frequency, a first adjustment circuit that adjusts the oscillation frequency of the first oscillation circuit based on a reference clock signal, a second adjustment circuit that adjusts the oscillation frequency of the second oscillation circuit based on the reference clock signal, and a processing circuit that converts the time difference between the transition timing of the first signal and the transition timing of the second signal into a digital value based on the first and second clock signals.

Abstract: A circuit device includes a detection circuit which outputs angular velocity information, based on a detection signal from an angular velocity sensor element; and an output unit which outputs rotation number information of fixed-point notation that is obtained based on the angular velocity information. The output unit can output an integer part of the rotation number information as an integer part of the fixed-point notation, and can output a decimal part of the rotation number information as a decimal part of the fixed-point notation.

Abstract: A detection device includes: a detection circuit that performs detection processing based on a signal from a physical quantity transducer and outputs detection data; an interface that has communication connection with an external device and outputs the detection data to the external device; and a processing circuit. The processing circuit outputs the detection data acquired from the detection circuit at a common acquisition timing common to at least one other detection device and the own detection device, to the interface in a data transmitting order of own detection device.

Abstract: A circuit device includes: a time-to-digital conversion circuit to which a first clock signal with a first clock frequency and a second clock signal with a second clock frequency different from the first clock frequency are input and that converts a time difference in transition timings of first and second signals into a digital value; and a synchronization circuit that synchronizes phases of the first and second clock signals. The time-to-digital conversion circuit calculates the digital value corresponding to the time difference by transitioning a signal level of the first signal based on the first clock signal after a phase synchronization timing of the first and second clock signals and compares the phase of the second clock signal to a phase of the second signal having a signal level is transitioned to correspond to the first signal.

Abstract: An integrated circuit device includes: a first oscillation circuit that oscillates a first resonator to generate a first clock signal with a first clock frequency; a second oscillation circuit that oscillates a second oscillation element to generate a second clock signal with a second clock frequency that is different from the first clock frequency; and a time-to-digital conversion circuit that converts a time into a digital value using the first and second clock signals.

Abstract: A physical quantity measurement apparatus includes a first resonator, a second oscillator, and an integrated circuit device. The integrated circuit device includes a first oscillation circuit that causes the first resonator to oscillate, and thus generate a first clock signal having a first clock frequency, a second oscillation circuit that causes the second oscillator to oscillate, and thus generate a second clock signal having a second clock frequency which is different from the first clock frequency, and a measurement unit that is provided with a time-to-digital conversion circuit which converts time into a digital value by using the first clock signal and the second clock signal.

Abstract: A detection device includes an interface unit that performs communication with a host device which is a master, and a storage unit that stores information on a data transmission order of its own detection device. Ina case where the host device designates a common address which has a plurality of detection devices as common destinations, and issues a read command, the interface unit transmits the detected data to the host device in the data transmission order.

Abstract: A circuit device includes a drive circuit that drives a physical quantity transducer, an FLL circuit that includes a frequency comparator and an oscillator, and generates a clock signal with a signal from the drive circuit as a reference clock signal, and a detection circuit that includes a circuit operated based on the clock signal, and performs detection processing on a detection signal from the physical quantity transducer.

Abstract: A circuit device includes a drive circuit that drives a physical quantity transducer, an FLL circuit that includes a frequency comparator and an oscillator, and generates a clock signal with a signal from the drive circuit as a reference clock signal, and a detection circuit that includes a circuit operated based on the clock signal, and performs detection processing on a detection signal from the physical quantity transducer.

Abstract: A circuit device includes a drive circuit which drives a vibrating reed; a detection circuit which outputs physical quantity information corresponding to the physical quantity, based on a detection signal according to a physical quantity that is output from the vibrating reed; and an arithmetic processing unit which performs arithmetic processing, based on the physical quantity information from the detection circuit and time interval information that is defined by a drive frequency of the drive circuit.

Abstract: A circuit device includes a detection circuit which outputs angular velocity information, based on a detection signal from an angular velocity sensor element; and an output unit which outputs rotation number information of fixed-point notation that is obtained based on the angular velocity information. The output unit can output an integer part of the rotation number information as an integer part of the fixed-point notation, and can output a decimal part of the rotation number information as a decimal part of the fixed-point notation.

Abstract: A detection device includes an interface unit that performs communication with a host device which is a master, and a storage unit that stores information on a data transmission order of its own detection device. Ina case where the host device designates a common address which has a plurality of detection devices as common destinations, and issues a read command, the interface unit transmits the detected data to the host device in the data transmission order.

Abstract: An engine has a crankshaft and a plurality of cylinders arranged in a row in a direction parallel to the crankshaft. Combustion in the cylinder adjacent to each end portion of the crankshaft to suppress bending strain of the crankshaft at said one end portion. The vibration control conditions of controlling combustion in the cylinders adjacent to the respective end portions of the crankshaft are set on the basis of properties of vibration of the engine and resonant frequencies at the respective end portions of the crankshaft and the conditions of combustion in the respective cylinders are controlled on the basis of the vibration control conditions set for the respective cylinders.

Abstract: An automatic sheet stack loading mechanism of a paper sheet feeding apparatus has a main lift for supporting a stack of sheets to be fed thereon. The main lift is incrementally moved upwardly to place the uppermost sheet of the stack at a predetermined height position with respect to a sheet separator disposed over the stack and operating to separate the sheets one by one from the stack. When the stack of sheets is consumed considerably, parallel horizontal spits are inserted under the stack from both transverse sides of the stack thereby to support the load of the stack and to enable the main lift to be lowered to receive a new stack of the sheets. The insertion of the spits in the transverse direction of the stack is advantageous in that the central portion of the sheets of the stack along the direction of feed of the sheets is maintained at constant height irrespective of downward deflection of the spits so that adjustment in position of the sheet separator is not required.

Abstract: A multi-layer type heat exchanger is formed by a row of parallel flat tubes each having tank portions spaced widthwise of the flat tube and disposed adjacent to one end thereof. Each tube defines therein a passage for a heat transfer fluid extending from one tank portion towards the other end of the tube and is then turned to the other tank portion. The flat tubes are stacked such that the tank portions are connected together in fluid-flow communication with each other. The portions of each adjacent pair of tubes excepting the tank portions are spaced apart to accommodate a corrugated fin. Each tube is formed by two press-worked core plates soldered together to form the passage in the tube. Two adjacent core plates of each adjacent pair of tubes have bent end portions extending to and engaged with each other or integrally connected together to support the other ends of the adjacent tubes in spaced relationship to accommodate the fin therebetween.