公开(公告)号：DE3367059D1

公开(公告)日：1986-11-20

申请号：DE3367059

申请日：1983-06-30

Applicant: IBM ,  IBM FRANCE

Inventor： FERRY MICHEL ,  TREHIN JACQUES LOUIS

IPC: G05F1/46 ,  H04M19/00

Abstract: A circuit for supplying direct current to a line (a, b) from a battery via two supply resistors (RA, RB). Part of the current supplied by the battery flows in a secondary path including a resistor (R4) and a transistor (16), and is maintained at a constant value. A symmetrical and differential resistance bridge connected between the supply resistors and the line detects the transverse alternating current flowing into the battery, and means (15) are provided to cause the transistor to generate a negative-feedback alternating current whose value is adjusted to cancel said transverse alternating current.

公开(公告)号：FR2352448A1

公开(公告)日：1977-12-16

申请号：FR7616128

申请日：1976-05-21

Applicant: IBM FRANCE

Inventor： FERRY MICHEL ,  REYNES DANIEL

IPC: H01H47/32 ,  H01F7/18 ,  H01L27/07 ,  H03K17/0814 ,  H03K17/10 ,  H03K17/64 ,  H03K17/08