POWER SUPPLY CIRCUIT

摘要

This power supply circuit has: a first electrical amplifier for amplifying an input signal; a high-pass filter for removing frequency components lower than a first cut-off frequency set beforehand on the basis of the output signal of the first electrical amplifier; a current detector for detecting a current value of the output signal of the first electrical amplifier; a combined signal generation circuit for combining the input signal with the output signal of the current detector; a second electrical amplifier for amplifying the output signal of the combined signal generation circuit; a low-pass filter for removing frequency components higher than a second cut-off frequency set beforehand on the basis of the output signal of the second electrical amplifier; and a signal output terminal which combines the currents of the output signal of the high-pass filter and the output signal of the low-pass filter to output thereof.