公开(公告)号：DE3382467D1

公开(公告)日：1992-01-16

申请号：DE3382467

申请日：1983-03-25

Applicant: IBM

Inventor： ANDERSON TODD BARRY ,  GLASER THOMAS WILLIAM ,  NEESZ JOHN JACOB

IPC: G11B21/08 ,  G11B5/55 ,  G11B5/58

公开(公告)号：DE3369779D1

公开(公告)日：1987-03-12

申请号：DE3369779

申请日：1983-04-08

Applicant: IBM

Inventor： NEESZ JOHN JACOB

IPC: G05D13/62 ,  G05B21/02 ,  H02P7/29 ,  H02P29/00 ,  H02P5/00

Abstract: The circuit provides damping for digitally controlled devices where the provision of power pulses in response to sensing a given device parameter may result in a regularity of pulses that causes a resonant condition with a frequency that interferes with other device functions or induces error conditions. The circuit shown randomizes to a motor by random gating of a sequence of commands retained in a shift register (31). Random gating from the shift register positions occurs through the use of a counter (33) driven by an oscillator, independent of other device functions and clocking circuits, in conjunction with an enabling circuit from a random digitized data source that enables or disables counter advance by the oscillator.