Seiko Instruments Inc

Ablic Inc.

Chiba University

Yuji Wakabayashi

Satoshi Machida

Kiyofumi Muro

Toshiyuki Uchida

Tomohisa Endo

Ken Kitahara

A sensor device includes a detection electrode opposing an external electrode, and generating a voltage corresponding to a change in capacitance; a capacitive amplifier circuit having a first capacitor and a second capacitor, and configured to detect the voltage generated in the detection electrode, and output a detection signal obtained by amplifying the voltage generated in the detection electrode based on a capacitance ratio between the first capacitor and the second capacitor; a reset switch configured to reset the voltage of the detection electrode to a reference potential; a changeover switch configured to switch the capacitive amplifier circuit between a capacitive amplifier and a voltage follower; a second changeover switch configured to disconnect the first capacitor from the capacitive amplifier circuit; and a second reset switch configured to reset a voltage of the first capacitor to the reference potential.

Sensor device

A tunable external resonator laser is mode-hop-free for broadband and has a laser chip which emits light;

External resonator laser

Provided is a photodetector device for detecting light intensity based on a detection signal of a difference circuit, the photodetector device including: a first light receiving element which generates an electric charge based on incident light; a second light receiving element, which includes a light blocking part for blocking incident light and generates an electric charge being a reference; and a storage detection circuit for detecting that an output voltage of the first light receiving element or the second light receiving element has reached a predetermined potential and outputting the detection signal when the difference does not reach a predetermined value even though sufficient incident light is provided.

Photodetector device

Growing community of inventors

Chiba, Japan

Yuji Wakabayashi