Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural active motor elements
Patent
1989-02-01
1990-05-22
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural active motor elements
324144, 324146, 324166, 324160, G01R 1136, G01P 348
Patent
active
049280600
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.
REFERENCES:
patent: 3946311 (1976-03-01), Baker et al.
patent: 4230984 (1980-10-01), Taylor
patent: 4556885 (1985-12-01), Kurosawa
patent: 4827209 (1989-05-01), Tanaka et al.
Eisenzopf Reinhard J.
Harvey Jack B.
Jeco Company, Ltd.
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