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灵巧的小型耳机放大电路

发布时间:2018-04-04  查看:697


如图为灵巧的小型耳机放大电路。该电路中MAX4410运放芯片体积小巧,亿芯网电子技术交流 - 电子工程师的天堂 - ICBuy http://www.icbuy.com http://tec.icbuy.com PGEgaHJlZj0iaHR0cDovL3RlYy5pY2J1eS5jb20vIiB0YXJnZXQ9Il9ibGFuayI+5Lq/6Iqv572R55S15a2Q5oqA5pyv5Lqk5rWBPC9hPiAtIDxhIGhyZWY9Imh0dHA6Ly90ZWMuaWNidXkuY29tLyIgdGFyZ2V0PSJfYmxhbmsiPueUteWtkOW3peeoi+W4iOeahOWkqeWggjwvYT4gLSA8YSBocmVmPSJodHRwOi8vdGVjLmljYnV5LmNvbS8iIHRhcmdldD0iX2JsYW5rIj5JQ0J1eTwvYT4gICBodHRwOi8vd3d3LmljYnV5LmNvbSAgaHR0cDovL3RlYy5pY2J1eS5jb20gOG9oNExlQkRacDVSckVJN0U0d3I=而且芯片内部设计有电源供给泵,亿芯网电子技术交流 - 电子工程师的天堂 - ICBuy http://www.icbuy.com http://tec.icbuy.com PGEgaHJlZj0iaHR0cDovL3RlYy5pY2J1eS5jb20vIiB0YXJnZXQ9Il9ibGFuayI+5Lq/6Iqv572R55S15a2Q5oqA5pyv5Lqk5rWBPC9hPiAtIDxhIGhyZWY9Imh0dHA6Ly90ZWMuaWNidXkuY29tLyIgdGFyZ2V0PSJfYmxhbmsiPueUteWtkOW3peeoi+W4iOeahOWkqeWggjwvYT4gLSA8YSBocmVmPSJodHRwOi8vdGVjLmljYnV5LmNvbS8iIHRhcmdldD0iX2JsYW5rIj5JQ0J1eTwvYT4gICBodHRwOi8vd3d3LmljYnV5LmNvbSAgaHR0cDovL3RlYy5pY2J1eS5jb20gOG9oNExlQkRacDVSckVJN0U0d3I=可以解决低供电电源带来的种种问题。两路立体声每个声道均可以借助断开跳线JP1和2独立关断。正常工作时JP1和JP2与电源相连。如果两个声道同时关断。则供给泵就自动切断。这时电流消耗仅有6uA左右,亿芯网电子技术交流 - 电子工程师的天堂 - ICBuy http://www.icbuy.com http://tec.icbuy.com PGEgaHJlZj0iaHR0cDovL3RlYy5pY2J1eS5jb20vIiB0YXJnZXQ9Il9ibGFuayI+5Lq/6Iqv572R55S15a2Q5oqA5pyv5Lqk5rWBPC9hPiAtIDxhIGhyZWY9Imh0dHA6Ly90ZWMuaWNidXkuY29tLyIgdGFyZ2V0PSJfYmxhbmsiPueUteWtkOW3peeoi+W4iOeahOWkqeWggjwvYT4gLSA8YSBocmVmPSJodHRwOi8vdGVjLmljYnV5LmNvbS8iIHRhcmdldD0iX2JsYW5rIj5JQ0J1eTwvYT4gICBodHRwOi8vd3d3LmljYnV5LmNvbSAgaHR0cDovL3RlYy5pY2J1eS5jb20gOG9oNExlQkRacDVSckVJN0U0d3I=非常省电。MAX4410芯片内部有热保护和短路保护双重功能。放大器配置成反相运放模式,亿芯网电子技术交流 - 电子工程师的天堂 - ICBuy http://www.icbuy.com http://tec.icbuy.com PGEgaHJlZj0iaHR0cDovL3RlYy5pY2J1eS5jb20vIiB0YXJnZXQ9Il9ibGFuayI+5Lq/6Iqv572R55S15a2Q5oqA5pyv5Lqk5rWBPC9hPiAtIDxhIGhyZWY9Imh0dHA6Ly90ZWMuaWNidXkuY29tLyIgdGFyZ2V0PSJfYmxhbmsiPueUteWtkOW3peeoi+W4iOeahOWkqeWggjwvYT4gLSA8YSBocmVmPSJodHRwOi8vdGVjLmljYnV5LmNvbS8iIHRhcmdldD0iX2JsYW5rIj5JQ0J1eTwvYT4gICBodHRwOi8vd3d3LmljYnV5LmNvbSAgaHR0cDovL3RlYy5pY2J1eS5jb20gOG9oNExlQkRacDVSckVJN0U0d3I=增益由R3/R1或R4/R2决定,亿芯网电子技术交流 - 电子工程师的天堂 - ICBuy http://www.icbuy.com http://tec.icbuy.com PGEgaHJlZj0iaHR0cDovL3RlYy5pY2J1eS5jb20vIiB0YXJnZXQ9Il9ibGFuayI+5Lq/6Iqv572R55S15a2Q5oqA5pyv5Lqk5rWBPC9hPiAtIDxhIGhyZWY9Imh0dHA6Ly90ZWMuaWNidXkuY29tLyIgdGFyZ2V0PSJfYmxhbmsiPueUteWtkOW3peeoi+W4iOeahOWkqeWggjwvYT4gLSA8YSBocmVmPSJodHRwOi8vdGVjLmljYnV5LmNvbS8iIHRhcmdldD0iX2JsYW5rIj5JQ0J1eTwvYT4gICBodHRwOi8vd3d3LmljYnV5LmNvbSAgaHR0cDovL3RlYy5pY2J1eS5jb20gOG9oNExlQkRacDVSckVJN0U0d3I=输入阻抗则取决于R1和R2。C1和C2主要用来阻隔来自两个输入端的可能的剩余直流成分。





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