Fujitsu Corporation

Fujitsu Microelectronics Limited

Hideaki Kondo

Masaru Sawada

Norio Murakami

Masahiro Nagakura

Syoichi Masui

Shigeyuki Kuroyanagi

A transmitting and receiving circuit includes a transmitting side amplifier circuit amplifying a transmission signal transmitted from an antenna, a receiving side amplifier circuit amplifying a reception signal received by the antenna and being electrically connected to the a transmitting side amplifier circuit, a first matching circuit matching the antenna and the transmitting side amplifier circuit, a second matching circuit matching the antenna and the receiving side amplifier circuit, a first current source circuit capable of controlling an operating state and setting a first connection point between the first matching circuit and an output terminal of the transmitting side amplifier circuit to a given voltage, and a second current source circuit capable of controlling an operating state and setting a second connection point between the second matching circuit and an input terminal of the receiving side amplifier circuit to a given voltage.

Transmitting and receiving circuit

A filter circuit includes a low-pass filter and a calibration circuit calibrating a frequency characteristic of the low-pass filter. The calibration circuit includes a negative feedback circuit and a control circuit.

filter circuit and semiconductor device

A geometric constraint memory processing section causes a data memory section to temporarily store geometric constraint conditions inputted by an input unit. A geometric constraint display data processing section creates geometric constraint display data from individual items of geometric constraint data read from this data memory section. An assembly processing unit shifts solid shape data created by a solid shape creating unit within a display space on the basis of the geometric constraint data and thus creates three-dimensional model display data. A display processing unit displays all the geometric constraint conditions in superposition on the three-dimensional model displayed by the three-dimensional model display data.

Growing community of inventors

Yokohama, Japan

Hideaki Kondo