| 摘要 |
PROBLEM TO BE SOLVED: To expand the operation range of in-phase input in a comparatively simple configuration by respectively connecting one and the other input terminals through a DC shift circuit to one and the other input terminals of plural error amplifiers and mutually connecting the output terminals of these plural error amplifiers. SOLUTION: This circuit is provided with (n) pieces of error amplifiers 101 -10n . Then, input terminals 1a and 1b on one side and the other side to supply signals are respectively connected through DC shift circuits 121 -12n and 141 -14n to the input terminals of these (n) pieces of error amplifiers 101 -10n on one side and the other side. At the same time, the output terminals of these (n) pieces of error amplifiers 101 -10n are parallelly connected so as to lead out output terminals 11a and 11b. Thus, the operation range of the in-phase input to this error amplifier becomes the sum of operation ranges of in-phase input to these (n) pieces of error amplifiers 101 -10n and the wide operation range of in-phase input can be achieved. |
