公开(公告)号：US20210041508A1

公开(公告)日：2021-02-11

申请号：US17079653

申请日：2020-10-26

Applicant: DENSO CORPORATION

Inventor： Hirokazu SADAMATSU ,  Shinichiro NAKATA ,  Makoto OISHI

IPC: G01R31/52 ,  H03F3/45 ,  H03M1/64

Abstract: A resolver signal processing circuit for amplifying two phase signals output from a resolver includes first and second amplifier circuits configured to adjust an input in-phase voltage range to output an intended voltage even when a short-circuit arises in the resolver. The resolver signal processing circuit further includes first and second short-circuit detection circuits configured to detect the short-circuit arising in the resolver and short-circuits in first and second signal input paths from the resolver to the first and the second amplifier circuits, respectively, and first and second voltage adjusting units configured to adjust input in-phase voltage ranges of the first and second amplifier circuits when the first and second short-circuit detection circuits detect short-circuits, respectively. The first and second amplifier circuits are configured to adjust the input in-phase voltage ranges, respectively.