Title:
アナログ入力信号処理回路
Document Type and Number:
Japanese Patent JP4354939
Kind Code:
B2
Abstract:
A signal voltage, which a variable analog signal source generates, is inputted to a microprocessor via a gain adjustment circuit, a switched capacitor filter circuit, and an analog comparison circuit. The microprocessor that cooperates with a program memory generates a control signal pulse train of a variable period and a variable duty. Filter characteristics are adjusted with a period of the control signal pulse trains CNTa and CNTb, and gain is adjusted with a pulse duty. Even if a comparison reference voltage of the analog adjustment circuit is a fixed value, it is possible to make virtual change and adjustment of a comparison reference voltage by adjusting a gain of the gain adjustment circuit. As a result, it is possible to provide an analog input signal processing circuit capable of individually adjusting input filter characteristics and input gain.
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| WO/2009/090883 | SAMPLING FILTER DEVICE |
| JPH05283614 | CAPACITOR STRUCTURE OF INTEGRATED CIRCUIT |
Inventors:
Koji Hashimoto
Tetsuji Watanabe
Manabu Yamashita
Tetsuji Watanabe
Manabu Yamashita
Application Number:
JP2005271853A
Publication Date:
October 28, 2009
Filing Date:
September 20, 2005
Export Citation:
Assignee:
Mitsubishi Electric Corporation
International Classes:
H03H19/00; F02D45/00; H03F3/70; H03G3/12; H03G9/00; H03M1/18
Domestic Patent References:
| JP6505805A |
Attorney, Agent or Firm:
Masuo Oiwa
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami