2 small magnification difference between the balanced output circuit

A balanced output mentioned, people tend to immediately think of the positive phase amplifier output terminal increases 0P amplifier as the inverting amplifier circuit, normal

and reversed phase output set to lose balance fH o in the DC circuit, although this method can be used, but as Tiao are wide -band signal, the inverting amplifier cup drift is a problem. Since this circuit. OP measures also zoom in and drift d is equal to the soil, so even if the input frequency of change seven phase distortion does not occur 4

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