Denso Corporation

Mikio Sugiki

Hiroshi Okada

Hajime Ito

Yasuaki Makino

Takashi Katsumata

Masaki Takashima

Takao Tsuruhara

Yuji Kutsuna

A miniaturized sensor such as a micro-accelerometer includes a sensor chip having a sensor element mounted thereon, with the sensor element being oriented with its central axes passing through the corners of the sensor chip. The corners of the sensor element are thereby located substantially apart from the corners of the sensor chip, so that bending deformation which displaces corners of the sensor chip is substantially prevented from causing displacement of corners of the sensor element. Detection inaccuracy resulting from such displacement can thereby be prevented or reduced.

Sensor apparatus for detecting variations in a dynamic quantity while suppressing detection deviations that are caused by bending deformation of a sensor chip

Detecting the rotational direction of a rotor is feasible by allowing a constant current source to supply a constant current flowing from an electric potential supply line to the earth in response to a turning-on action of a switch. Accordingly, detecting both the rotational speed and the rotational direction of the rotor is feasible by using three wiring cables of a power source line, an earth line, and a signal line outputting a pulse signal in accordance with the rotation of the gear. Using such a one-stage voltage adjustment enables the detection signal processing circuit to reduce electric power consumption compared with a system requiring a two-stage voltage adjustment.

Detection signal processing circuit and detection signal processing apparatus for a rotation sensor

The gyro sensor uses a clock signal as a timing signal or synchronous signal for reading various data stored in a built-in memory for its yaw rate sensing operation. The gyro sensor is configured to use, as such a clock signal, the self-excited oscillation signal being applied to the vibrator of the gyro sensor as a vibrator drive signal.

Gyro sensor

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Toyokawa, Japan

Mikio Sugiki