The invention discloses a single-end input double-end output amplifier circuit and signal disposing circuit, which comprises the following parts: amplifier to amplify the input signal, input end to receive the input signal and first output end, single-end input double-end output conversion circuit to converse the amplified signal to differential signal, first transistor to receive the amplified signal, first grid to couple the first output end, first first pole to couple the second output end, first second pole to couple the first node, second transistor with second grid to couple the second first pole of third output end, second second pole to couple the first node, second capacitance coupled between the second output end and second grid, first resistance coupled between the second output end and power source, second resistance coupled between the third output end and voltage source, current source coupled between the first node and ground point.