Mitsumi Electric Company Ltd.

Yoichi Sakaue

Takahiko Nishiyama

An optical scanning device includes an optical scanner including a mirror that includes a light reflection surface, a driving source that causes the mirror to rotate around a rotation axis passing through the center of the light reflection surface in response to a driving signal, and a piezoelectric sensor that outputs a sensor signal corresponding to a rotational angle of the mirror around the rotation axis; and an impedance conversion circuit that receives the sensor signal from the piezoelectric sensor, performs impedance conversion on the received sensor signal, and outputs the impedance-converted sensor signal.

Optical scanning device and head-up display

A digital and analog reception apparatus includes a first mixer (MIX1) which converts up a reception signal having an input frequency fa inputted into an input terminal IN and a second mixer (MIX2) which converts down a first intermediate frequency fc of a signal outputted from the first mixer (MIX1) by using a second local frequency fd and a second intermediate frequency fe. The apparatus is also provided with a phase-locked loop (PLL), an automatic frequency controller (AFC) which comprises a second local oscillator and a low frequency band pass filter unit LPF adjusts a second local frequency fd, and a microcomputer discriminates an analog/digital distinction of the reception signal having the input frequency fa. Upon receiving an analog signal, the digital and analog reception apparatus deactivates a low-pass filter unit LPF, thereby having an AFC signal control a second local oscillator. On the other hand, upon reception of a digital signal, the phase-locked loop (PLL) and the low-pass filter unit LPF control the second local oscillator.

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Tokyo, Japan

Yoichi Sakaue