AMPLIFIER CIRCUIT, AMPLIFICATION METHOD, AND METHOD OF ADJUSTING SUPPLY VOLTAGE

PROBLEM TO BE SOLVED: To improve reproducibility of amplified signal waveforms in amplification of input signals having waveforms, where a first interval at which signal values vary within variation ranges limited by one limiting value of upper and lower limits, and a second interval other than the first interval appear repeatedly. SOLUTION: An amplifier circuit 1 includes: a waveform deformation section 10 for changing the signal value of the second interval T2 to decrease a difference between signal strength of a DC component of the input signal and the limiting values (VL, VU) within the variation range of the signal value of the first interval T1; a DC component removal section C1 for removing the DC component of the input signal deformed by the waveform deformation section 10; and an amplification section 20 for amplifying the input signal from which the DC component is removed. COPYRIGHT: (C)2011,JPO&INPIT