发明名称 |
Gain control circuit |
摘要 |
A circuit for varying the gain of an amplifier circuit linearly in decibel by the use of a digital code signal varying linearly, wherein a resistance network to be connected between an amplifier having a fixed gain and an input or output portion for the amplification is connected and the gain of the amplifier as well as the values of resistance elements constituting the resistance network is set so that the transfer function of the amplifier circuit may become: <IMAGE> .
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申请公布号 |
US4292596(A) |
申请公布日期 |
1981.09.29 |
申请号 |
US19790066239 |
申请日期 |
1979.08.13 |
申请人 |
HITACHI, LTD. |
发明人 |
ISHIZUKA, KOHEI;KITA, YASUHIRO;MAEDA, NARIMICHI |
分类号 |
H03G3/02;H03G3/00;H03G3/12;(IPC1-7):H03G3/00 |
主分类号 |
H03G3/02 |
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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