发明名称 |
RF variable gain amplifying device |
摘要 |
An RF variable gain amplifying device has an amplifying circuit, a switch element connected in parallel with the amplifying circuit, and a resistor connected in parallel with the amplifying circuit and with the switch element. The amplifying circuit does not operate when the switch element is in the ON state but operates when the switch element is in the OFF state. A potential at each of the input and output terminals of the switch element is lower when the switch element is in the ON state than when the switch element is in the OFF state.
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申请公布号 |
US6667657(B2) |
申请公布日期 |
2003.12.23 |
申请号 |
US20020074038 |
申请日期 |
2002.02.14 |
申请人 |
MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD. |
发明人 |
NAKATANI TOSHIFUMI;ITO JUNJI;IMANISHI IKUO |
分类号 |
H03G3/20;H03F3/72;H03G3/10;H03G3/30;(IPC1-7):H03F1/14 |
主分类号 |
H03G3/20 |
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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