发明名称 |
Semiconductor Integrated Circuit and Radio Communication Terminal Including the Same |
摘要 |
A semiconductor integrated circuit includes an operational amplifier that amplifies a voltage difference between an input voltage supplied to an inverting input terminal and a reference voltage supplied to a non-inverting input terminal and outputs an amplified signal, a feedback resistor that performs negative feedback of the amplified signal to the inverting input terminal of the operational amplifier, and a variable resistor unit that sets a current path with a first resistance value in accordance with a control signal between an external input terminal and the inverting input terminal of the operational amplifier, and sets a first alternative path with a second resistance value in accordance with the control signal between a node on the current path and a reference voltage terminal to which the reference voltage is supplied. |
申请公布号 |
US2016006477(A1) |
申请公布日期 |
2016.01.07 |
申请号 |
US201514857615 |
申请日期 |
2015.09.17 |
申请人 |
Renesas Electronics Corporation |
发明人 |
Igarashi Yutaka;Katsube Yusaku |
分类号 |
H04B1/707;H03F3/45;H03F3/19 |
主分类号 |
H04B1/707 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
Tokyo JP |