Motorola Corporation

National Semiconductor Corporation

Iwasaki Electric Co., Ltd.

Dainippon Plastics Co., Ltd.

Tadashi Sakurai

Masahiro Kojima

Yoshio Kishima

Yasuo Yoshida

Hirofumi Kinugasa

William H Gross

Tadashi Kakinuma

Prior to weathering test for samples, of example, plastic, fiber, or paint, the samples are exposed to ultraviolet ray radiation emitted from high pressure metal halide vapor discharge lamp at an energy level capable of deteriorating the samples in a short time, while maintaining the samples at a temperature which can not be a cause of the deterioration. According to the deterioration level, samples to be subjected to the weathering evaluation test are selected.

Apparatus for accelerated weather-testing of a sample using a metal

A first converter which includes a switching element operating on a comparatively lower threshold voltage and generating a first output voltage, a second converter which includes a switching element operating on a threshold voltage higher than that of the first conversion unit and generating a second output voltage higher than the first output voltage, and a level shift circuit which provides the switching signal for activating the switching element of the second converter in accordance with generation of the first output voltage.

DC/DC converter

An operational power amplifier having a bootstrap power output stage is designed to provide maximum dynamic range over a wide range of supply voltages. A control circuit in the form of a switched current mirror is added to the amplifier biasing circuit. At supply voltage higher than a predetermined threshold, the amplifier bias is adjusted to provide one half of this voltage at the output terminal. For supply voltages less than the threshold value, the output voltage is made less than half supply voltage.

Low voltage op amp bias optimizer

Growing community of inventors

Tokyo, Japan

Tadashi Sakurai