发明名称 |
Power amplifying device for driving loudspeakers |
摘要 |
A power amplifier device comprising first and second output terminals connected to a loudspeaker, and a power amplifier having a non-inverting input supplied with an audio signal, an output connected to the first output terminal and an inverting input. The second output terminal is grounded through a first resistor and connected to an input of an inverting amplifier having a gain of -1. An output of the inverting amplifier is connected to the inverting input of the power amplifier through a second resistor. The output of the power amplifier is connected to its inverting input through a third resistor. The ratio of the third resistor to the second resistor is selected to be larger than 1 whereby the output impedance of the power amplifier device as seen from the first and second output terminals is made to be negative.
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申请公布号 |
US4223273(A) |
申请公布日期 |
1980.09.16 |
申请号 |
US19780957211 |
申请日期 |
1978.11.03 |
申请人 |
NIPPON GAKKI SEIZO KABUSHIKI KAISHA |
发明人 |
YOKOYAMA, KENJI |
分类号 |
H03F1/34;H03F1/56;H03F3/20;(IPC1-7):H03F1/34 |
主分类号 |
H03F1/34 |
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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