Pulse driver for flux gate magnetometer
US4447776A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 24, 1981 |
| Grant date | May 8, 1984 |
| Priority date | — |
| Expiry date | Apr 24, 2001 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01R33/04
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A driver circuit for a fluxgate magnetometer has a repetition rate controble independent of the magnetometer core winding inductances, and a current-ON interval terminated only by core saturation. In this manner, power consumption is greatly reduced as compared to prior magnetometers without sacrificing low-noise operation. Previous drivers operated in a free-running flyback mode at high pulse repetition rates. The present driver reduces the oscillator repetition rate, and power consumption, by the use of a control loop from the flyback oscillator which signals the end of a current pulse as the magnetometer core rebounds from the saturated state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.