Renesas Electronics Corporation

Dai Nippon Printing Co., Ltd.

Nec Electronics Corporation

Hideaki Koyama

Yasushi Sato

Akihide Murakami

A semiconductor device includes an analog front-end unit that performs analog front-end processing of a measurement signal input from a sensor, where circuit configuration and circuit characteristics for performing the analog front-end processing are changeable, and an MCU unit that converts the measurement signal after the analog front-end processing from analog to digital and sets circuit configuration and circuit characteristics to the analog front-end unit.

Semiconductor device and sensor system

An inverting negative voltage DC-DC power supply circuit comprises a first resistor having one end connected to an output terminal for converting a change in output voltage into a current. A zero-volt clamp circuit is connected to the other end of the first resistor and comprises a first and second transistor. A current mirror circuit comprises a third and fourth transistor and is connected to the zero-volt clamp circuit for causing a current of the same value as that of a current flowing in the zero-volt clamp circuit to flow. A second resistor is connected to the current mirror circuit for converting a change in current flowing from the zero-volt clamp circuit into a voltage.

Growing community of inventors

Kawasaki, Japan

Hideaki Koyama