Circuit for driving electromagnetically-actuated displays

Details Circuit for driving electromagnetically-actuated displays Circuit for driving electromagnetically-actuated displays

1980-05-09

1982-04-06

Trafton, David L.

Communications: electrical

Land vehicle alarms or indicators

Internal alarm or indicator responsive to a condition of the...

340373, 340813, G09G 320

Patent

active

043238947

ABSTRACT:
A circuit to drive electromagnetically actuated displays. The circuit maintains a precise current level regardless of variations in supply voltage and drive coil resistance. The inductance of the drive coil is utilized to increase the efficiency of the current control.

REFERENCES:
patent: 4069480 (1978-01-01), Helwig
patent: 4178575 (1979-12-01), Ono
patent: 4250504 (1981-02-01), Eichelberger

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