基本信息:
- 专利标题： Variable gain amplifier
- 专利标题（中）：可变增益放大器
- 申请号：JP8312682 申请日：1982-05-19
- 公开(公告)号：JPS58200611A 公开(公告)日：1983-11-22
- 发明人： KOBAYASHI TERUO
- 申请人： Hitachi Ltd
- 专利权人： Hitachi Ltd
- 当前专利权人： Hitachi Ltd
- 优先权： JP8312682 1982-05-19
- 主分类号： H03G3/02
- IPC分类号： H03G3/02 ; H03G3/04
摘要：
PURPOSE:To set the gain freely and simply, by providing plural operating circuits multiplying a certain coefficient with an output signal, synthesizing the outputs of a selected operating circuit and feeding back the synthesized result to an input. CONSTITUTION:An output VO of an operational amplifier 3 to which an input signal Vi is applied, is supplied to operating circuits K1-Kn multiplying coefficients k1-kn via switches S1-Sn. Further, the output of each operating circuit is summed at an adder M and applied to an input of the amplifier 3 as a feedback signal Vf. The gain G of this circuit is G=VO/vi=1/(k1+k2+...+kn). Thus, the setting of the gain G is done by selecting the coefficients k1-kn with the plural switches S1-Sn. The switches S1-Sn are switched with an external signal in this way, allowing to set the gain freely and simply.
摘要（中）：
目的：通过提供将一定系数与输出信号相乘的多个操作电路，可以自由设置增益，合成所选择的操作电路的输出并将合成结果反馈给输入。 构成：施加有输入信号Vi的运算放大器3的输出VO经由开关S1-Sn向运算电路K1-Kn乘以系数k1-kn。 此外，每个操作电路的输出在加法器M相加，并作为反馈信号Vf加到放大器3的输入端。 该电路的增益G为G = VO / vi = 1 /（k1 + k2 + ... + kn）。 因此，通过用多个开关S1-Sn选择系数k1-kn来完成增益G的设定。 开关S1-Sn以这种方式用外部信号切换，允许自由地简单地设置增益。
公开/授权文献:
- JPS58185671U JPS58185671U - 公开/授权日：1983-12-09