Abstract: An amplification circuit of the present invention includes a first MOS transistor having a gate to which a first input terminal for inputting a positive logic input signal or a reference potential is connected and a drain to which a first load is connected, a second MOS transistor having a gate to which a second input terminal for inputting a negative logic input signal, which composes differential input signals with the positive logic signal, or the reference potential is connected and a drain to which an output terminal and a second load are connected, and pairing up with the first MOS transistor, and a current source to which sources of the first and second MOS transistors are connected, for supplying a constant current when the difference in voltage between the first and second input terminals is in a predetermined range, and varying the current to be supplied when the difference in voltage is beyond the predetermined range.

Abstract: An amplification circuit of the present invention includes a first MOS transistor having a gate to which a first input terminal for inputting a positive logic input signal or a reference potential is connected and a drain to which a first load is connected, a second MOS transistor having a gate to which a second input terminal for inputting a negative logic input signal, which composes differential input signals with the positive logic signal, or the reference potential is connected and a drain to which an output terminal and a second load are connected, and pairing up with the first MOS transistor, and a current source to which sources of the first and second MOS transistors are connected, for supplying a constant current when the difference in voltage between the first and second input terminals is in a predetermined range, and varying the current to be supplied when the difference in voltage is beyond the predetermined range.