Power driver control circuit for servo actuator
US4300080A · kind A · utility
12Cited by
4References
30Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Oct 22, 1979 |
| Grant date | Nov 10, 1981 |
| Priority date | — |
| Expiry date | Oct 22, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11B5/5552
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A power driver control circuit (38) provides control signals (44, 46, 48, 50, 52, 54) for switching transistors in a power driver (56) for an electromagnetic actuator (11) of the type used for controlling a servo head (12) in a closed loop servo system. The control circuit includes variable time delay circuits (70, 71) connected to threshold detectors (74, 84) so that dead zones can be created when the servo error signal changes polarity thereby isolating the switches and preventing switch burn-out.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.