Op amp's output signal and two input voltage signal proportional to the difference in the audio section are: output voltage = A0 (E1-E2), which, A0 is the low-frequency op amp open loop gain (eg 100dB, that is 100,000 times) , E1 is the input signal with the phase voltage, E2 is the inverting input

operational amplifier output signal and two input signal voltage difference between the paragraph is directly proportional to the audio output voltage=A : There are 0 (E E 2) 1 -0, in which the operational amplifiers, A low frequency of open loop gain (such as 100, i.e. 100,000 dB E 1 times), is the

　Transports the input electric potential which puts usually to request to be higher than negative supply some value, but is lower than positive electricity source some value.Transports after the special design puts may permit the input electric potential in from the negative supply to the positive e

　　Operational amplifier's output signal proportional to the voltage difference of two input signals, audio: output voltage =A0 (E1-E2), of which, A0 is the open-loop amplifier of low frequency gain (such as 100dB, is 100,000 times times), E1 is the end of the input signal voltage, E2 is the RP side

　　Operational amplifier's output signal proportional to the voltage difference of two input signals, audio: output voltage =A0 (E1-E2), of which, A0 is the open-loop amplifier of low frequency gain (such as 100dB, is 100,000 times times), E1 is the end of the input signal voltage, E2 is the RP side