Invention Grant
- Patent Title: Gain control amplification device
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Application No.: US15834199Application Date: 2017-12-07
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Publication No.: US10447223B2Publication Date: 2019-10-15
- Inventor: Masanori Kurimoto , Yuki Iwagami , Masamitsu Uchiyama
- Applicant: Mitsubishi Electric Corporation
- Applicant Address: JP Chiyoda-ku, Tokyo
- Assignee: Mitsubishi Electric Corporation
- Current Assignee: Mitsubishi Electric Corporation
- Current Assignee Address: JP Chiyoda-ku, Tokyo
- Agency: Sughrue Mion, PLLC
- Agent Richard C. Turner
- Priority: JP2017-113140 20170608
- Main IPC: H03F3/45
- IPC: H03F3/45 ; H03G3/30 ; H03G1/00

Abstract:
Provided is a gain control amplification device having a wide range and high accuracy and configured to adapt measurement target current to the input range of an A/D converter. The gain control amplification device includes: a plurality of differential amplifiers having different gains with respect to measurement target current or voltage; a threshold control circuit for comparing output of the differential amplifier with threshold voltage; a switch for selecting output of one of the plurality of differential amplifiers on the basis of output of the threshold control circuit; and an offset control circuit OF and an addition circuit for adding offset voltage to output of one of the differential amplifiers.
Public/Granted literature
- US20180358944A1 GAIN CONTROL AMPLIFICATION DEVICE Public/Granted day:2018-12-13
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