发明名称 |
Circuit for varying gain of preamplifier |
摘要 |
A gain switching circuit switches a conversion gain of a preamplifier that is configured with a series circuit formed with a first resistor and a first switching element and a series circuit formed with a second resistor and a second switching element respectively connected in parallel with a feedback resistor. The gain switching circuit includes a first operating unit that generates a first switching element operating signal for closing the first switching element within a first gain switching period, and a second operating unit that generates a second switching element operating signal for closing the second switching element within a second gain switching period.
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申请公布号 |
US7598479(B2) |
申请公布日期 |
2009.10.06 |
申请号 |
US20030566240 |
申请日期 |
2003.07.30 |
申请人 |
MITSUBISHI DENKI KABUSHIKI KAISHA |
发明人 |
NOGAMI MASAMICHI;NODA MASAKI;TAGAMI HITOYUKI;MOTOSHIMA KUNIAKI |
分类号 |
H03F3/08;H03G3/30;H04B10/158 |
主分类号 |
H03F3/08 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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