Seiko Epson Corporation

Epson Toyocom Corporation

Shinji Nishio

Jun Watanabe

Hiroyuki Ogiso

Takahiro Kameta

Katsuro Yoneya

Masahiro Onuki

A physical quantity measurement device includes a physical quantity measurement sensor and a metal block that is a holding member that includes block surfaces that serve as a plurality of holding portions for holding the physical quantity measurement sensor, and the block surface has a groove formed in a region facing the physical quantity measurement sensor.

Physical quantity measurement device and electronic apparatus

A sensor includes a plurality of mounting boards with sensor components mounted on amounting surface, and a support member provided with fixation surfaces adapted to fix the plurality of mounting boards, the sensor components are disposed between the mounting boards and the support member, and the mounting boards are connected to each other with a connection member.

Sensor having a plurality of mounting boards on which sensor components are mounted, an electronic apparatus having the sensor, and a moving object having the sensor

A piezoelectric oscillator includes: a piezoelectric resonator element having a piezoelectric substrate and an excitation electrode formed on a surface of the piezoelectric substrate; a semiconductor circuit element provided with an oscillation circuit for oscillating the piezoelectric resonator element and having a first insulating film formed on a principal surface; a package for airtightly housing the semiconductor circuit element and the piezoelectric resonator element; and a protruding section having at least of a thin film circuit component formed on the first insulating film and connected to the oscillation circuit; and a second insulating film formed on the first insulating film and covering the thin film circuit component. In the oscillator, the piezoelectric resonator element is fixed to an upper surface of the protruding section.

Piezoelectric oscillator and transmitter

A surface acoustic wave device comprises a surface acoustic wave element, including: a piezoelectric substrate, a first interdigital transducer unit having a first interdigital transducer and a second interdigital transducer formed on the piezoelectric substrate, and a second interdigital transducer unit having a third interdigital transducer and a fourth interdigital transducer formed on the piezoelectric substrate; a first terminal electrically coupled to the first interdigital transducer; a second terminal electrically coupled to the second interdigital transducer; a first variable resistor electrically coupling the first terminal to the third interdigital transducer; a second variable resistor electrically coupling the first terminal to the fourth interdigital transducer; a third variable resistor electrically coupling the second terminal to the third interdigital transducer; and a fourth variable resistor electrically coupling the second terminal to the fourth interdigital transducer.

Surface acoustic wave device, transmitter, and transceiver

A clock shaping device includes a first clock signal selection portion that selects between a reception clock signal and a back-up clock signal based on a detected loss in the reception clock signal. A second clock signal selection portion selects between a clock signal received from the first clock signal selection portion and a clock signal received from a quartz crystal oscillation circuit based on a detected loss in the back-up clock signal. A voltage controlled oscillation circuit has a frequency that varies with a control voltage being supplied and outputs a feedback loop output signal. A phase comparison portion generates a phase difference signal based on a comparison between the feedback loop output signal and a clock signal outputted from the second clock signal selection portion. A loop filter smoothes the phase difference signal and outputs the phase difference signal in the form of the control voltage.

Growing community of inventors

Suwa, Japan

Shinji Nishio