Driving circuit of a crossed-coil type instrument using digital data pulse production
US4928060A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 1, 1989 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Feb 1, 2009 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01P3/489
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A driving circuit for driving a crossed-coil type instrument used for reading a physical quantity in which a pair of windings surrounding a movable magnet carrying a pointer needle thereon are disposed to cross each other with a predetermined mechanical angle. The driving circuit comprises a digital data conversion circuit supplied with an electrical signal representing the physical quantity to be measured for producing a digital data representing the electrical signal, a pulse data producing circuit supplied with the digital data for producing a number of pulses in correspondence with the digital data, and a drive signal generating circuit supplied with the pulses for generating first and second analog drive signals therefrom. The driving signals are respectively supplied to the first and second windings for moving the magnet disposed in the first and second windings.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.