Abstract： |
The invention relates to one audio earphone amplifier in electron sound technique field, which comprises front appendix buffer circuit, core power drive circuit, source direct current servo circuit, wherein, the audio input signals pass through level part, first integration computation amplifier, resistance RR2, first integration amplifier LM4766, resistance RoR1 and earphone socket; the resistance RR5 are over resistance RoR1 and LM4766 reverse phase end; LM4766 reverse phase input end is connected to earth resistance RR3; the resistance RR7 are over connection point and second integration amplifier NE5532 input end. |
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