公开(公告)号：US11764779B2

公开(公告)日：2023-09-19

申请号：US17893980

申请日：2022-08-23

申请人： BEIJING ORIENT INSTITUTE OF MEASUREMENT AND TEST

发明人： Xiaoding Huang ,  Yazhen Tong ,  Jianzhen Cai ,  Zhongwei Wang ,  Pan Pan ,  Yi Sun ,  Shuqiang Wang ,  Jiaolan Yu ,  Qianjuan Wang ,  Jingjing Li ,  Xuwei Hou

IPC分类号： G05F1/46 ,  H01C1/16 ,  H01F27/42 ,  H03H11/28 ,  H03K17/92

CPC分类号： H03K17/92 ,  G05F1/46 ,  H01C1/16 ,  H01F27/42 ,  H03H11/28

摘要： A four-terminal-pair AC quantum resistance dissemination bridge and related methods are provided. The bridge includes: a supply transformer IVD1, a Kelvin branch A1, a Wagner branch A0, the first and second current sources A2, A3, an injection inductive voltage divider A4, a ratio transformer IVD2, the first and second four-terminal AC resistor connection points Z1, Z2, chokes H, and null indicators D. An isolated inductive winding LO is wound along the ratio transformer IVD2 and supplies excitation current to primary winding of injection inductive voltage divider A4 to avoid the mutual influence among various balance networks and rapid balance of the bridge can be realized. By changing turn ratio of primary winding L3 and secondary winding L4 of the second inductive voltage divider T2, the phase shift can be realized through only one set of capacitors for imaginary part error compensation, the bridge with multiple frequency points can be obtained.