Niigata Seimitsu Co., Ltd.

Toyota Jidosha Kabushiki Kaisha

Kabushiki Kaisha Toyota Jidoshokki

Okuno Chemical Industries Co., Ltd.

Isami Kato

Hiroshi Miyagi

Toshihisa Shimo

Kyoko Kumagai

Takeshi Bessho

Manabu Osamura

Takeaki Maeda

A production method of an electroless plating material of the present invention is a method for the production of an electroless plating material that has a surface to be plated by electroless plating, and includes an ozone treatment step in which a material body that is made of a resin is brought into contact with a solution that contains ozone to form a modified layer in a surface of the material body, and a superficial layer removal step in which, after the ozone treatment step, the surface of the material body is irradiated with ultraviolet rays to remove a superficial layer of the modified layer.

Method for production of electroless plating material

The oscillating unitgenerates a signal having a frequency of n*f, i.e., n times a target frequency f. The control voltage generation circuitcompares the phase difference between a divided signal of a signal generated in the oscillating unitand the reference signal, and outputs a DC control voltage according to the phase difference to the oscillating unit, thereby controlling an oscillation frequency. The divider circuitconverts a signal generated in the oscillating unitto the target frequency f, by dividing the aforementioned signal into n equal units. By setting the oscillation frequency of the oscillating unit at n times the target frequency, the inductance and the capacitors can be formed on a semiconductor integrated circuit board.

Oscillator circuit

An object of the present invention is to provide a receiver, a digital-analog converter and a tuning circuit in which temperature compensating components can be formed on a semiconductor substrate while reducing component costs. An FM receiveris constituted by including an antenna, a high frequency receiving circuit, a local oscillator, two digital-analog converters (DACs), a control section, a mixing circuit, an intermediate frequency amplification circuit, a detection circuit, a low frequency amplification circuitand the speaker. The DACshave a predetermined temperature coefficient, of which output voltage is changed in accordance with ambient temperature. When a characteristic of VCOis changed with variations of ambient temperature so as to cause a control voltage applied to the VCOto be changed, output voltages of the DACsare also changed similarly.

Receiver, digital-analog converter and tuning circuit

Receiver digital-analog converter and tuning circuit

Growing community of inventors

Kariya, Japan

Isami Kato