Matsushita Electric Industrial Co., Ltd.

Youichi Okamoto

Akira Matsuzawa

Keiichi Kusumoto

Kenji Murata

Heiji Ikoma

Koji Oka

Junichi Naka

Daisuke Nomasaki

Yoshitsugu Inagaki

Hiroshi Sakura

When the performance of an A/D converter required by a system changes, power consumption of the overall system can be reduced. The resolution of an A/D converter is made variable by changing a current flowing through an amplifier by an external control signal that specifies the resolution. Thus, when the performance required by a system changes, it is possible to change the performance of the A/D converter and to prevent a performance overhead of the A/D converter. Consequently, power consumption of the A/D converter is reduced, and power consumption of the system as a whole is also reduced.

A/D converter, method of A/D conversion, and signal processing device

According to the present invention, a signal transmission circuit for receiving an input signal and outputting an output signal corresponding to the input signal is provided. The signal transmission circuit includes: a first capacitance; an electric charge supply section for supplying electric charge corresponding to the input signal to the first capacitance; a second capacitance; and a transfer section for transferring the electric charge from the first capacitance to the second capacitance. In the signal transmission circuit, the second capacitance is larger than the first capacitance.

Signal transmission circuit, signal transmission method A/D converter

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Osaka, Japan

Youichi Okamoto