Design features of a precision ac-dc converter

Abstract

With the avai lability today of high performance operation al a mplifie rs and r elated co mpone nts, it is poss ible to co ns truct an ins trume nt for ac-dc transfer work that meets t.he requlre~e nt s of a s tandards labora tory. Transformation of meas ured average a-c values Into doc .volt.age IS possIble wIth a predI ctable accuracy of 20 parts per million up to 1 kHz. PrecIsIon of opera tIOn IS assured from dc to 100 kHz.