发明名称 |
Automatic mixer apparatus |
摘要 |
An automatic mixer apparatus is described which comprises a plurality of channels each including a level detecting circuit, a comparator and a voltage control amplifier, a gain control circuit for controlling the gains of the voltage control amplifiers of the respective channels and a mixer circuit for mixing signals from the voltage control amplifiers. The level detecting circuit detects a level of an aural signal received at the corresponding channel and the comparator operates to compare the detected level from the detecting circuit and a reference level. When the detected level is higher than the reference level, the comparator outputs a comparison signal to the corresponding voltage control amplifier to turn on. The gain control circuit receives the comparison signals from the whole comparators and outputs a gain control signal to the respective voltage amplifiers whereby the gains thereof are controlled in accordance with the number of the comparison signals received at the gain control circuit.
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申请公布号 |
US5148491(A) |
申请公布日期 |
1992.09.15 |
申请号 |
US19900575243 |
申请日期 |
1990.08.30 |
申请人 |
TOA CORPORATION |
发明人 |
SAKAMOTO, SINJI;FURUKAWA, KENICHI |
分类号 |
H03G3/20;H04R3/00;H04R27/00 |
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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